Index: imaps-frontend/node_modules/clean-css/lib/optimizer/clone.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/clone.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/clone.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,33 @@
+var wrapSingle = require('./wrap-for-optimizing').single;
+
+var Token = require('../tokenizer/token');
+
+function deep(property) {
+  var cloned = shallow(property);
+  for (var i = property.components.length - 1; i >= 0; i--) {
+    var component = shallow(property.components[i]);
+    component.value = property.components[i].value.slice(0);
+    cloned.components.unshift(component);
+  }
+
+  cloned.dirty = true;
+  cloned.value = property.value.slice(0);
+
+  return cloned;
+}
+
+function shallow(property) {
+  var cloned = wrapSingle([
+    Token.PROPERTY,
+    [Token.PROPERTY_NAME, property.name]
+  ]);
+  cloned.important = property.important;
+  cloned.hack = property.hack;
+  cloned.unused = false;
+  return cloned;
+}
+
+module.exports = {
+  deep: deep,
+  shallow: shallow
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/configuration.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/configuration.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/configuration.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,1640 @@
+// Contains the interpretation of CSS properties, as used by the property optimizer
+
+var breakUp = require('./configuration/break-up');
+var canOverride = require('./configuration/can-override');
+var restore = require('./configuration/restore');
+
+var propertyOptimizers = require('./level-1/property-optimizers');
+var valueOptimizers = require('./level-1/value-optimizers');
+
+var override = require('../utils/override');
+
+// Properties to process
+// Extend this object in order to add support for more properties in the optimizer.
+//
+// Each key in this object represents a CSS property and should be an object.
+// Such an object contains properties that describe how the represented CSS property should be handled.
+// Possible options:
+//
+// * components: array (Only specify for shorthand properties.)
+//   Contains the names of the granular properties this shorthand compacts.
+//
+// * canOverride: function
+//   Returns whether two tokens of this property can be merged with each other.
+//   This property has no meaning for shorthands.
+//
+// * defaultValue: string
+//   Specifies the default value of the property according to the CSS standard.
+//   For shorthand, this is used when every component is set to its default value, therefore it should be the shortest possible default value of all the components.
+//
+// * shortestValue: string
+//   Specifies the shortest possible value the property can possibly have.
+//   (Falls back to defaultValue if unspecified.)
+//
+// * breakUp: function (Only specify for shorthand properties.)
+//   Breaks the shorthand up to its components.
+//
+// * restore: function (Only specify for shorthand properties.)
+//   Puts the shorthand together from its components.
+//
+var configuration = {
+  animation: {
+    canOverride: canOverride.generic.components([
+      canOverride.generic.time,
+      canOverride.generic.timingFunction,
+      canOverride.generic.time,
+      canOverride.property.animationIterationCount,
+      canOverride.property.animationDirection,
+      canOverride.property.animationFillMode,
+      canOverride.property.animationPlayState,
+      canOverride.property.animationName
+    ]),
+    components: [
+      'animation-duration',
+      'animation-timing-function',
+      'animation-delay',
+      'animation-iteration-count',
+      'animation-direction',
+      'animation-fill-mode',
+      'animation-play-state',
+      'animation-name'
+    ],
+    breakUp: breakUp.multiplex(breakUp.animation),
+    defaultValue: 'none',
+    restore: restore.multiplex(restore.withoutDefaults),
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.textQuotes,
+      valueOptimizers.time,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-delay': {
+    canOverride: canOverride.generic.time,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: '0s',
+    intoMultiplexMode: 'real',
+    valueOptimizers: [
+      valueOptimizers.time,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-direction': {
+    canOverride: canOverride.property.animationDirection,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: 'normal',
+    intoMultiplexMode: 'real',
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-duration': {
+    canOverride: canOverride.generic.time,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: '0s',
+    intoMultiplexMode: 'real',
+    keepUnlessDefault: 'animation-delay',
+    valueOptimizers: [
+      valueOptimizers.time,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-fill-mode': {
+    canOverride: canOverride.property.animationFillMode,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: 'none',
+    intoMultiplexMode: 'real',
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-iteration-count': {
+    canOverride: canOverride.property.animationIterationCount,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: '1',
+    intoMultiplexMode: 'real',
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-name': {
+    canOverride: canOverride.property.animationName,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: 'none',
+    intoMultiplexMode: 'real',
+    valueOptimizers: [
+      valueOptimizers.textQuotes
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-play-state': {
+    canOverride: canOverride.property.animationPlayState,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: 'running',
+    intoMultiplexMode: 'real',
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'animation-timing-function': {
+    canOverride: canOverride.generic.timingFunction,
+    componentOf: [
+      'animation'
+    ],
+    defaultValue: 'ease',
+    intoMultiplexMode: 'real',
+    vendorPrefixes: [
+      '-moz-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  background: {
+    canOverride: canOverride.generic.components([
+      canOverride.generic.image,
+      canOverride.property.backgroundPosition,
+      canOverride.property.backgroundSize,
+      canOverride.property.backgroundRepeat,
+      canOverride.property.backgroundAttachment,
+      canOverride.property.backgroundOrigin,
+      canOverride.property.backgroundClip,
+      canOverride.generic.color
+    ]),
+    components: [
+      'background-image',
+      'background-position',
+      'background-size',
+      'background-repeat',
+      'background-attachment',
+      'background-origin',
+      'background-clip',
+      'background-color'
+    ],
+    breakUp: breakUp.multiplex(breakUp.background),
+    defaultValue: '0 0',
+    propertyOptimizer: propertyOptimizers.background,
+    restore: restore.multiplex(restore.background),
+    shortestValue: '0',
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.urlWhiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.zero,
+      valueOptimizers.color,
+      valueOptimizers.urlPrefix,
+      valueOptimizers.urlQuotes
+    ]
+  },
+  'background-attachment': {
+    canOverride: canOverride.property.backgroundAttachment,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: 'scroll',
+    intoMultiplexMode: 'real'
+  },
+  'background-clip': {
+    canOverride: canOverride.property.backgroundClip,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: 'border-box',
+    intoMultiplexMode: 'real',
+    shortestValue: 'border-box'
+  },
+  'background-color': {
+    canOverride: canOverride.generic.color,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: 'transparent',
+    intoMultiplexMode: 'real', // otherwise real color will turn into default since color appears in last multiplex only
+    multiplexLastOnly: true,
+    nonMergeableValue: 'none',
+    shortestValue: 'red',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'background-image': {
+    canOverride: canOverride.generic.image,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: 'none',
+    intoMultiplexMode: 'default',
+    valueOptimizers: [
+      valueOptimizers.urlWhiteSpace,
+      valueOptimizers.urlPrefix,
+      valueOptimizers.urlQuotes,
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero,
+      valueOptimizers.color
+    ]
+  },
+  'background-origin': {
+    canOverride: canOverride.property.backgroundOrigin,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: 'padding-box',
+    intoMultiplexMode: 'real',
+    shortestValue: 'border-box'
+  },
+  'background-position': {
+    canOverride: canOverride.property.backgroundPosition,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: ['0', '0'],
+    doubleValues: true,
+    intoMultiplexMode: 'real',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'background-repeat': {
+    canOverride: canOverride.property.backgroundRepeat,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: ['repeat'],
+    doubleValues: true,
+    intoMultiplexMode: 'real'
+  },
+  'background-size': {
+    canOverride: canOverride.property.backgroundSize,
+    componentOf: [
+      'background'
+    ],
+    defaultValue: ['auto'],
+    doubleValues: true,
+    intoMultiplexMode: 'real',
+    shortestValue: '0 0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  bottom: {
+    canOverride: canOverride.property.bottom,
+    defaultValue: 'auto',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  border: {
+    breakUp: breakUp.border,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.property.borderStyle,
+      canOverride.generic.color
+    ]),
+    components: [
+      'border-width',
+      'border-style',
+      'border-color'
+    ],
+    defaultValue: 'none',
+    overridesShorthands: [
+      'border-bottom',
+      'border-left',
+      'border-right',
+      'border-top'
+    ],
+    restore: restore.withoutDefaults,
+    shorthand: true,
+    shorthandComponents: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.zero,
+      valueOptimizers.color
+    ]
+  },
+  'border-bottom': {
+    breakUp: breakUp.border,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.property.borderStyle,
+      canOverride.generic.color
+    ]),
+    components: [
+      'border-bottom-width',
+      'border-bottom-style',
+      'border-bottom-color'
+    ],
+    defaultValue: 'none',
+    restore: restore.withoutDefaults,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.zero,
+      valueOptimizers.color
+    ]
+  },
+  'border-bottom-color': {
+    canOverride: canOverride.generic.color,
+    componentOf: [
+      'border-bottom',
+      'border-color'
+    ],
+    defaultValue: 'none',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'border-bottom-left-radius': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-radius'
+    ],
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.borderRadius,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-'
+    ]
+  },
+  'border-bottom-right-radius': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-radius'
+    ],
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.borderRadius,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-'
+    ]
+  },
+  'border-bottom-style': {
+    canOverride: canOverride.property.borderStyle,
+    componentOf: [
+      'border-bottom',
+      'border-style'
+    ],
+    defaultValue: 'none'
+  },
+  'border-bottom-width': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-bottom',
+      'border-width'
+    ],
+    defaultValue: 'medium',
+    oppositeTo: 'border-top-width',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'border-collapse': {
+    canOverride: canOverride.property.borderCollapse,
+    defaultValue: 'separate'
+  },
+  'border-color': {
+    breakUp: breakUp.fourValues,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.color,
+      canOverride.generic.color,
+      canOverride.generic.color,
+      canOverride.generic.color
+    ]),
+    componentOf: [
+      'border'
+    ],
+    components: [
+      'border-top-color',
+      'border-right-color',
+      'border-bottom-color',
+      'border-left-color'
+    ],
+    defaultValue: 'none',
+    restore: restore.fourValues,
+    shortestValue: 'red',
+    shorthand: true,
+    singleTypeComponents: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'border-left': {
+    breakUp: breakUp.border,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.property.borderStyle,
+      canOverride.generic.color
+    ]),
+    components: [
+      'border-left-width',
+      'border-left-style',
+      'border-left-color'
+    ],
+    defaultValue: 'none',
+    restore: restore.withoutDefaults,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.zero,
+      valueOptimizers.color
+    ]
+  },
+  'border-left-color': {
+    canOverride: canOverride.generic.color,
+    componentOf: [
+      'border-color',
+      'border-left'
+    ],
+    defaultValue: 'none',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'border-left-style': {
+    canOverride: canOverride.property.borderStyle,
+    componentOf: [
+      'border-left',
+      'border-style'
+    ],
+    defaultValue: 'none'
+  },
+  'border-left-width': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-left',
+      'border-width'
+    ],
+    defaultValue: 'medium',
+    oppositeTo: 'border-right-width',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'border-radius': {
+    breakUp: breakUp.borderRadius,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit
+    ]),
+    components: [
+      'border-top-left-radius',
+      'border-top-right-radius',
+      'border-bottom-right-radius',
+      'border-bottom-left-radius'
+    ],
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.borderRadius,
+    restore: restore.borderRadius,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-'
+    ]
+  },
+  'border-right': {
+    breakUp: breakUp.border,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.property.borderStyle,
+      canOverride.generic.color
+    ]),
+    components: [
+      'border-right-width',
+      'border-right-style',
+      'border-right-color'
+    ],
+    defaultValue: 'none',
+    restore: restore.withoutDefaults,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'border-right-color': {
+    canOverride: canOverride.generic.color,
+    componentOf: [
+      'border-color',
+      'border-right'
+    ],
+    defaultValue: 'none',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'border-right-style': {
+    canOverride: canOverride.property.borderStyle,
+    componentOf: [
+      'border-right',
+      'border-style'
+    ],
+    defaultValue: 'none'
+  },
+  'border-right-width': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-right',
+      'border-width'
+    ],
+    defaultValue: 'medium',
+    oppositeTo: 'border-left-width',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'border-style': {
+    breakUp: breakUp.fourValues,
+    canOverride: canOverride.generic.components([
+      canOverride.property.borderStyle,
+      canOverride.property.borderStyle,
+      canOverride.property.borderStyle,
+      canOverride.property.borderStyle
+    ]),
+    componentOf: [
+      'border'
+    ],
+    components: [
+      'border-top-style',
+      'border-right-style',
+      'border-bottom-style',
+      'border-left-style'
+    ],
+    defaultValue: 'none',
+    restore: restore.fourValues,
+    shorthand: true,
+    singleTypeComponents: true
+  },
+  'border-top': {
+    breakUp: breakUp.border,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.property.borderStyle,
+      canOverride.generic.color
+    ]),
+    components: [
+      'border-top-width',
+      'border-top-style',
+      'border-top-color'
+    ],
+    defaultValue: 'none',
+    restore: restore.withoutDefaults,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.zero,
+      valueOptimizers.color,
+      valueOptimizers.unit
+    ]
+  },
+  'border-top-color': {
+    canOverride: canOverride.generic.color,
+    componentOf: [
+      'border-color',
+      'border-top'
+    ],
+    defaultValue: 'none',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'border-top-left-radius': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-radius'
+    ],
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.borderRadius,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-'
+    ]
+  },
+  'border-top-right-radius': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-radius'
+    ],
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.borderRadius,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-o-'
+    ]
+  },
+  'border-top-style': {
+    canOverride: canOverride.property.borderStyle,
+    componentOf: [
+      'border-style',
+      'border-top'
+    ],
+    defaultValue: 'none'
+  },
+  'border-top-width': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'border-top',
+      'border-width'
+    ],
+    defaultValue: 'medium',
+    oppositeTo: 'border-bottom-width',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'border-width': {
+    breakUp: breakUp.fourValues,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit
+    ]),
+    componentOf: [
+      'border'
+    ],
+    components: [
+      'border-top-width',
+      'border-right-width',
+      'border-bottom-width',
+      'border-left-width'
+    ],
+    defaultValue: 'medium',
+    restore: restore.fourValues,
+    shortestValue: '0',
+    shorthand: true,
+    singleTypeComponents: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'box-shadow': {
+    propertyOptimizer: propertyOptimizers.boxShadow,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero,
+      valueOptimizers.color
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-ms-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  clear: {
+    canOverride: canOverride.property.clear,
+    defaultValue: 'none'
+  },
+  clip: {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  color: {
+    canOverride: canOverride.generic.color,
+    defaultValue: 'transparent',
+    shortestValue: 'red',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'column-gap': {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  cursor: {
+    canOverride: canOverride.property.cursor,
+    defaultValue: 'auto'
+  },
+  display: { canOverride: canOverride.property.display },
+  filter: {
+    propertyOptimizer: propertyOptimizers.filter,
+    valueOptimizers: [
+      valueOptimizers.fraction
+    ]
+  },
+  float: {
+    canOverride: canOverride.property.float,
+    defaultValue: 'none'
+  },
+  font: {
+    breakUp: breakUp.font,
+    canOverride: canOverride.generic.components([
+      canOverride.property.fontStyle,
+      canOverride.property.fontVariant,
+      canOverride.property.fontWeight,
+      canOverride.property.fontStretch,
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.property.fontFamily
+    ]),
+    components: [
+      'font-style',
+      'font-variant',
+      'font-weight',
+      'font-stretch',
+      'font-size',
+      'line-height',
+      'font-family'
+    ],
+    restore: restore.font,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.textQuotes
+    ]
+  },
+  'font-family': {
+    canOverride: canOverride.property.fontFamily,
+    defaultValue: 'user|agent|specific',
+    valueOptimizers: [
+      valueOptimizers.textQuotes
+    ]
+  },
+  'font-size': {
+    canOverride: canOverride.generic.unit,
+    defaultValue: 'medium',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.fraction
+    ]
+  },
+  'font-stretch': {
+    canOverride: canOverride.property.fontStretch,
+    defaultValue: 'normal'
+  },
+  'font-style': {
+    canOverride: canOverride.property.fontStyle,
+    defaultValue: 'normal'
+  },
+  'font-variant': {
+    canOverride: canOverride.property.fontVariant,
+    defaultValue: 'normal'
+  },
+  'font-weight': {
+    canOverride: canOverride.property.fontWeight,
+    defaultValue: 'normal',
+    propertyOptimizer: propertyOptimizers.fontWeight,
+    shortestValue: '400'
+  },
+  gap: {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  height: {
+    canOverride: canOverride.generic.unit,
+    defaultValue: 'auto',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  left: {
+    canOverride: canOverride.property.left,
+    defaultValue: 'auto',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'letter-spacing': {
+    valueOptimizers: [
+      valueOptimizers.fraction,
+      valueOptimizers.zero
+    ]
+  },
+  'line-height': {
+    canOverride: canOverride.generic.unitOrNumber,
+    defaultValue: 'normal',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.fraction,
+      valueOptimizers.zero
+    ]
+  },
+  'list-style': {
+    canOverride: canOverride.generic.components([
+      canOverride.property.listStyleType,
+      canOverride.property.listStylePosition,
+      canOverride.property.listStyleImage
+    ]),
+    components: [
+      'list-style-type',
+      'list-style-position',
+      'list-style-image'
+    ],
+    breakUp: breakUp.listStyle,
+    restore: restore.withoutDefaults,
+    defaultValue: 'outside', // can't use 'disc' because that'd override default 'decimal' for <ol>
+    shortestValue: 'none',
+    shorthand: true
+  },
+  'list-style-image': {
+    canOverride: canOverride.generic.image,
+    componentOf: [
+      'list-style'
+    ],
+    defaultValue: 'none'
+  },
+  'list-style-position': {
+    canOverride: canOverride.property.listStylePosition,
+    componentOf: [
+      'list-style'
+    ],
+    defaultValue: 'outside',
+    shortestValue: 'inside'
+  },
+  'list-style-type': {
+    canOverride: canOverride.property.listStyleType,
+    componentOf: [
+      'list-style'
+    ],
+    // NOTE: we can't tell the real default value here, it's 'disc' for <ul> and 'decimal' for <ol>
+    // this is a hack, but it doesn't matter because this value will be either overridden or
+    // it will disappear at the final step anyway
+    defaultValue: 'decimal|disc',
+    shortestValue: 'none'
+  },
+  margin: {
+    breakUp: breakUp.fourValues,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit
+    ]),
+    components: [
+      'margin-top',
+      'margin-right',
+      'margin-bottom',
+      'margin-left'
+    ],
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.margin,
+    restore: restore.fourValues,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'margin-bottom': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'margin'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'margin-top',
+    propertyOptimizer: propertyOptimizers.margin,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'margin-inline-end': {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'margin-inline-start': {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'margin-left': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'margin'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'margin-right',
+    propertyOptimizer: propertyOptimizers.margin,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'margin-right': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'margin'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'margin-left',
+    propertyOptimizer: propertyOptimizers.margin,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'margin-top': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'margin'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'margin-bottom',
+    propertyOptimizer: propertyOptimizers.margin,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'max-height': {
+    canOverride: canOverride.generic.unit,
+    defaultValue: 'none',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'max-width': {
+    canOverride: canOverride.generic.unit,
+    defaultValue: 'none',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'min-height': {
+    canOverride: canOverride.generic.unit,
+    defaultValue: '0',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'min-width': {
+    canOverride: canOverride.generic.unit,
+    defaultValue: '0',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  opacity: {
+    valueOptimizers: [
+      valueOptimizers.fraction,
+      valueOptimizers.precision
+    ]
+  },
+  outline: {
+    canOverride: canOverride.generic.components([
+      canOverride.generic.color,
+      canOverride.property.outlineStyle,
+      canOverride.generic.unit
+    ]),
+    components: [
+      'outline-color',
+      'outline-style',
+      'outline-width'
+    ],
+    breakUp: breakUp.outline,
+    restore: restore.withoutDefaults,
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.outline,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'outline-color': {
+    canOverride: canOverride.generic.color,
+    componentOf: [
+      'outline'
+    ],
+    defaultValue: 'invert',
+    shortestValue: 'red',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.color
+    ]
+  },
+  'outline-style': {
+    canOverride: canOverride.property.outlineStyle,
+    componentOf: [
+      'outline'
+    ],
+    defaultValue: 'none'
+  },
+  'outline-width': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'outline'
+    ],
+    defaultValue: 'medium',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  overflow: {
+    canOverride: canOverride.property.overflow,
+    defaultValue: 'visible'
+  },
+  'overflow-x': {
+    canOverride: canOverride.property.overflow,
+    defaultValue: 'visible'
+  },
+  'overflow-y': {
+    canOverride: canOverride.property.overflow,
+    defaultValue: 'visible'
+  },
+  padding: {
+    breakUp: breakUp.fourValues,
+    canOverride: canOverride.generic.components([
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit,
+      canOverride.generic.unit
+    ]),
+    components: [
+      'padding-top',
+      'padding-right',
+      'padding-bottom',
+      'padding-left'
+    ],
+    defaultValue: '0',
+    propertyOptimizer: propertyOptimizers.padding,
+    restore: restore.fourValues,
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'padding-bottom': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'padding'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'padding-top',
+    propertyOptimizer: propertyOptimizers.padding,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'padding-left': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'padding'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'padding-right',
+    propertyOptimizer: propertyOptimizers.padding,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'padding-right': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'padding'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'padding-left',
+    propertyOptimizer: propertyOptimizers.padding,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'padding-top': {
+    canOverride: canOverride.generic.unit,
+    componentOf: [
+      'padding'
+    ],
+    defaultValue: '0',
+    oppositeTo: 'padding-bottom',
+    propertyOptimizer: propertyOptimizers.padding,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  position: {
+    canOverride: canOverride.property.position,
+    defaultValue: 'static'
+  },
+  right: {
+    canOverride: canOverride.property.right,
+    defaultValue: 'auto',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'row-gap': {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  src: {
+    valueOptimizers: [
+      valueOptimizers.urlWhiteSpace,
+      valueOptimizers.urlPrefix,
+      valueOptimizers.urlQuotes
+    ]
+  },
+  'stroke-width': {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'text-align': {
+    canOverride: canOverride.property.textAlign,
+    // NOTE: we can't tell the real default value here, as it depends on default text direction
+    // this is a hack, but it doesn't matter because this value will be either overridden or
+    // it will disappear anyway
+    defaultValue: 'left|right'
+  },
+  'text-decoration': {
+    canOverride: canOverride.property.textDecoration,
+    defaultValue: 'none'
+  },
+  'text-indent': {
+    canOverride: canOverride.property.textOverflow,
+    defaultValue: 'none',
+    valueOptimizers: [
+      valueOptimizers.fraction,
+      valueOptimizers.zero
+    ]
+  },
+  'text-overflow': {
+    canOverride: canOverride.property.textOverflow,
+    defaultValue: 'none'
+  },
+  'text-shadow': {
+    canOverride: canOverride.property.textShadow,
+    defaultValue: 'none',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.zero,
+      valueOptimizers.color
+    ]
+  },
+  top: {
+    canOverride: canOverride.property.top,
+    defaultValue: 'auto',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  transform: {
+    canOverride: canOverride.property.transform,
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.degrees,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-ms-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  transition: {
+    breakUp: breakUp.multiplex(breakUp.transition),
+    canOverride: canOverride.generic.components([
+      canOverride.property.transitionProperty,
+      canOverride.generic.time,
+      canOverride.generic.timingFunction,
+      canOverride.generic.time
+    ]),
+    components: [
+      'transition-property',
+      'transition-duration',
+      'transition-timing-function',
+      'transition-delay'
+    ],
+    defaultValue: 'none',
+    restore: restore.multiplex(restore.withoutDefaults),
+    shorthand: true,
+    valueOptimizers: [
+      valueOptimizers.time,
+      valueOptimizers.fraction
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-ms-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'transition-delay': {
+    canOverride: canOverride.generic.time,
+    componentOf: [
+      'transition'
+    ],
+    defaultValue: '0s',
+    intoMultiplexMode: 'real',
+    valueOptimizers: [
+      valueOptimizers.time
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-ms-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'transition-duration': {
+    canOverride: canOverride.generic.time,
+    componentOf: [
+      'transition'
+    ],
+    defaultValue: '0s',
+    intoMultiplexMode: 'real',
+    keepUnlessDefault: 'transition-delay',
+    valueOptimizers: [
+      valueOptimizers.time,
+      valueOptimizers.fraction
+    ],
+    vendorPrefixes: [
+      '-moz-',
+      '-ms-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'transition-property': {
+    canOverride: canOverride.generic.propertyName,
+    componentOf: [
+      'transition'
+    ],
+    defaultValue: 'all',
+    intoMultiplexMode: 'placeholder',
+    placeholderValue: '_', // it's a short value that won't match any property and still be a valid `transition-property`
+    vendorPrefixes: [
+      '-moz-',
+      '-ms-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'transition-timing-function': {
+    canOverride: canOverride.generic.timingFunction,
+    componentOf: [
+      'transition'
+    ],
+    defaultValue: 'ease',
+    intoMultiplexMode: 'real',
+    vendorPrefixes: [
+      '-moz-',
+      '-ms-',
+      '-o-',
+      '-webkit-'
+    ]
+  },
+  'vertical-align': {
+    canOverride: canOverride.property.verticalAlign,
+    defaultValue: 'baseline',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  visibility: {
+    canOverride: canOverride.property.visibility,
+    defaultValue: 'visible'
+  },
+  '-webkit-tap-highlight-color': {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.color
+    ]
+  },
+  '-webkit-margin-end': {
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'white-space': {
+    canOverride: canOverride.property.whiteSpace,
+    defaultValue: 'normal'
+  },
+  width: {
+    canOverride: canOverride.generic.unit,
+    defaultValue: 'auto',
+    shortestValue: '0',
+    valueOptimizers: [
+      valueOptimizers.whiteSpace,
+      valueOptimizers.fraction,
+      valueOptimizers.precision,
+      valueOptimizers.unit,
+      valueOptimizers.zero
+    ]
+  },
+  'z-index': {
+    canOverride: canOverride.property.zIndex,
+    defaultValue: 'auto'
+  }
+};
+
+// generate vendor-prefixed configuration
+var vendorPrefixedConfiguration = {};
+
+function cloneDescriptor(propertyName, prefix) {
+  var clonedDescriptor = override(configuration[propertyName], {});
+
+  if ('componentOf' in clonedDescriptor) {
+    clonedDescriptor.componentOf = clonedDescriptor.componentOf.map(function(shorthandName) {
+      return prefix + shorthandName;
+    });
+  }
+
+  if ('components' in clonedDescriptor) {
+    clonedDescriptor.components = clonedDescriptor.components.map(function(longhandName) {
+      return prefix + longhandName;
+    });
+  }
+
+  if ('keepUnlessDefault' in clonedDescriptor) {
+    clonedDescriptor.keepUnlessDefault = prefix + clonedDescriptor.keepUnlessDefault;
+  }
+
+  return clonedDescriptor;
+}
+
+for (var propertyName in configuration) {
+  var descriptor = configuration[propertyName];
+
+  if (!('vendorPrefixes' in descriptor)) {
+    continue;
+  }
+
+  for (var i = 0; i < descriptor.vendorPrefixes.length; i++) {
+    var prefix = descriptor.vendorPrefixes[i];
+    var clonedDescriptor = cloneDescriptor(propertyName, prefix);
+    delete clonedDescriptor.vendorPrefixes;
+
+    vendorPrefixedConfiguration[prefix + propertyName] = clonedDescriptor;
+  }
+
+  delete descriptor.vendorPrefixes;
+}
+
+module.exports = override(configuration, vendorPrefixedConfiguration);
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/break-up.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/break-up.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/break-up.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,656 @@
+var InvalidPropertyError = require('../invalid-property-error');
+
+var wrapSingle = require('../wrap-for-optimizing').single;
+
+var Token = require('../../tokenizer/token');
+var Marker = require('../../tokenizer/marker');
+
+var formatPosition = require('../../utils/format-position');
+
+function _anyIsInherit(values) {
+  var i, l;
+
+  for (i = 0, l = values.length; i < l; i++) {
+    if (values[i][1] == 'inherit') {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function _colorFilter(validator) {
+  return function(value) {
+    return value[1] == 'invert' || validator.isColor(value[1]) || validator.isPrefixed(value[1]);
+  };
+}
+
+function _styleFilter(validator) {
+  return function(value) {
+    return value[1] != 'inherit' && validator.isStyleKeyword(value[1]) && !validator.isColorFunction(value[1]);
+  };
+}
+
+function _wrapDefault(name, property, configuration) {
+  var descriptor = configuration[name];
+  if (descriptor.doubleValues && descriptor.defaultValue.length == 2) {
+    return wrapSingle([
+      Token.PROPERTY,
+      [Token.PROPERTY_NAME, name],
+      [Token.PROPERTY_VALUE, descriptor.defaultValue[0]],
+      [Token.PROPERTY_VALUE, descriptor.defaultValue[1]]
+    ]);
+  } if (descriptor.doubleValues && descriptor.defaultValue.length == 1) {
+    return wrapSingle([
+      Token.PROPERTY,
+      [Token.PROPERTY_NAME, name],
+      [Token.PROPERTY_VALUE, descriptor.defaultValue[0]]
+    ]);
+  }
+  return wrapSingle([
+    Token.PROPERTY,
+    [Token.PROPERTY_NAME, name],
+    [Token.PROPERTY_VALUE, descriptor.defaultValue]
+  ]);
+}
+
+function _widthFilter(validator) {
+  return function(value) {
+    return value[1] != 'inherit'
+      && (validator.isWidth(value[1]) || validator.isUnit(value[1]) || validator.isDynamicUnit(value[1]))
+      && !validator.isStyleKeyword(value[1])
+      && !validator.isColorFunction(value[1]);
+  };
+}
+
+function animation(property, configuration, validator) {
+  var duration = _wrapDefault(property.name + '-duration', property, configuration);
+  var timing = _wrapDefault(property.name + '-timing-function', property, configuration);
+  var delay = _wrapDefault(property.name + '-delay', property, configuration);
+  var iteration = _wrapDefault(property.name + '-iteration-count', property, configuration);
+  var direction = _wrapDefault(property.name + '-direction', property, configuration);
+  var fill = _wrapDefault(property.name + '-fill-mode', property, configuration);
+  var play = _wrapDefault(property.name + '-play-state', property, configuration);
+  var name = _wrapDefault(property.name + '-name', property, configuration);
+  var components = [duration, timing, delay, iteration, direction, fill, play, name];
+  var values = property.value;
+  var value;
+  var durationSet = false;
+  var timingSet = false;
+  var delaySet = false;
+  var iterationSet = false;
+  var directionSet = false;
+  var fillSet = false;
+  var playSet = false;
+  var nameSet = false;
+  var i;
+  var l;
+
+  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
+    // eslint-disable-next-line max-len
+    duration.value = timing.value = delay.value = iteration.value = direction.value = fill.value = play.value = name.value = property.value;
+    return components;
+  }
+
+  if (values.length > 1 && _anyIsInherit(values)) {
+    throw new InvalidPropertyError('Invalid animation values at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  for (i = 0, l = values.length; i < l; i++) {
+    value = values[i];
+
+    if (validator.isTime(value[1]) && !durationSet) {
+      duration.value = [value];
+      durationSet = true;
+    } else if (validator.isTime(value[1]) && !delaySet) {
+      delay.value = [value];
+      delaySet = true;
+    } else if ((validator.isGlobal(value[1]) || validator.isTimingFunction(value[1])) && !timingSet) {
+      timing.value = [value];
+      timingSet = true;
+    } else if ((validator.isAnimationIterationCountKeyword(value[1])
+      || validator.isPositiveNumber(value[1]))
+      && !iterationSet) {
+      iteration.value = [value];
+      iterationSet = true;
+    } else if (validator.isAnimationDirectionKeyword(value[1]) && !directionSet) {
+      direction.value = [value];
+      directionSet = true;
+    } else if (validator.isAnimationFillModeKeyword(value[1]) && !fillSet) {
+      fill.value = [value];
+      fillSet = true;
+    } else if (validator.isAnimationPlayStateKeyword(value[1]) && !playSet) {
+      play.value = [value];
+      playSet = true;
+    } else if ((validator.isAnimationNameKeyword(value[1]) || validator.isIdentifier(value[1])) && !nameSet) {
+      name.value = [value];
+      nameSet = true;
+    } else {
+      throw new InvalidPropertyError('Invalid animation value at ' + formatPosition(value[2][0]) + '. Ignoring.');
+    }
+  }
+
+  return components;
+}
+
+function background(property, configuration, validator) {
+  var image = _wrapDefault('background-image', property, configuration);
+  var position = _wrapDefault('background-position', property, configuration);
+  var size = _wrapDefault('background-size', property, configuration);
+  var repeat = _wrapDefault('background-repeat', property, configuration);
+  var attachment = _wrapDefault('background-attachment', property, configuration);
+  var origin = _wrapDefault('background-origin', property, configuration);
+  var clip = _wrapDefault('background-clip', property, configuration);
+  var color = _wrapDefault('background-color', property, configuration);
+  var components = [image, position, size, repeat, attachment, origin, clip, color];
+  var values = property.value;
+
+  var positionSet = false;
+  var clipSet = false;
+  var originSet = false;
+  var repeatSet = false;
+
+  var anyValueSet = false;
+
+  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
+    // NOTE: 'inherit' is not a valid value for background-attachment
+    color.value = image.value = repeat.value = position.value = size.value = origin.value = clip.value = property.value;
+    return components;
+  }
+
+  if (property.value.length == 1 && property.value[0][1] == '0 0') {
+    return components;
+  }
+
+  for (var i = values.length - 1; i >= 0; i--) {
+    var value = values[i];
+
+    if (validator.isBackgroundAttachmentKeyword(value[1])) {
+      attachment.value = [value];
+      anyValueSet = true;
+    } else if (validator.isBackgroundClipKeyword(value[1]) || validator.isBackgroundOriginKeyword(value[1])) {
+      if (clipSet) {
+        origin.value = [value];
+        originSet = true;
+      } else {
+        clip.value = [value];
+        clipSet = true;
+      }
+      anyValueSet = true;
+    } else if (validator.isBackgroundRepeatKeyword(value[1])) {
+      if (repeatSet) {
+        repeat.value.unshift(value);
+      } else {
+        repeat.value = [value];
+        repeatSet = true;
+      }
+      anyValueSet = true;
+    } else if (validator.isBackgroundPositionKeyword(value[1])
+    || validator.isBackgroundSizeKeyword(value[1])
+    || validator.isUnit(value[1])
+    || validator.isDynamicUnit(value[1])) {
+      if (i > 0) {
+        var previousValue = values[i - 1];
+
+        if (previousValue[1] == Marker.FORWARD_SLASH) {
+          size.value = [value];
+        } else if (i > 1 && values[i - 2][1] == Marker.FORWARD_SLASH) {
+          size.value = [previousValue, value];
+          i -= 2;
+        } else {
+          if (!positionSet) { position.value = []; }
+
+          position.value.unshift(value);
+          positionSet = true;
+        }
+      } else {
+        if (!positionSet) { position.value = []; }
+
+        position.value.unshift(value);
+        positionSet = true;
+      }
+      anyValueSet = true;
+    } else if ((color.value[0][1] == configuration[color.name].defaultValue || color.value[0][1] == 'none') && (validator.isColor(value[1]) || validator.isPrefixed(value[1]))) {
+      color.value = [value];
+      anyValueSet = true;
+    } else if (validator.isUrl(value[1]) || validator.isFunction(value[1])) {
+      image.value = [value];
+      anyValueSet = true;
+    }
+  }
+
+  if (clipSet && !originSet) { origin.value = clip.value.slice(0); }
+
+  if (!anyValueSet) {
+    throw new InvalidPropertyError('Invalid background value at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  return components;
+}
+
+function borderRadius(property, configuration) {
+  var values = property.value;
+  var splitAt = -1;
+
+  for (var i = 0, l = values.length; i < l; i++) {
+    if (values[i][1] == Marker.FORWARD_SLASH) {
+      splitAt = i;
+      break;
+    }
+  }
+
+  if (splitAt === 0 || splitAt === values.length - 1) {
+    throw new InvalidPropertyError('Invalid border-radius value at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  var target = _wrapDefault(property.name, property, configuration);
+  target.value = splitAt > -1
+    ? values.slice(0, splitAt)
+    : values.slice(0);
+  target.components = fourValues(target, configuration);
+
+  var remainder = _wrapDefault(property.name, property, configuration);
+  remainder.value = splitAt > -1
+    ? values.slice(splitAt + 1)
+    : values.slice(0);
+  remainder.components = fourValues(remainder, configuration);
+
+  for (var j = 0; j < 4; j++) {
+    target.components[j].multiplex = true;
+    target.components[j].value = target.components[j].value.concat(remainder.components[j].value);
+  }
+
+  return target.components;
+}
+
+function font(property, configuration, validator) {
+  var style = _wrapDefault('font-style', property, configuration);
+  var variant = _wrapDefault('font-variant', property, configuration);
+  var weight = _wrapDefault('font-weight', property, configuration);
+  var stretch = _wrapDefault('font-stretch', property, configuration);
+  var size = _wrapDefault('font-size', property, configuration);
+  var height = _wrapDefault('line-height', property, configuration);
+  var family = _wrapDefault('font-family', property, configuration);
+  var components = [style, variant, weight, stretch, size, height, family];
+  var values = property.value;
+  var fuzzyMatched = 4; // style, variant, weight, and stretch
+  var index = 0;
+  var isStretchSet = false;
+  var isStretchValid;
+  var isStyleSet = false;
+  var isStyleValid;
+  var isVariantSet = false;
+  var isVariantValid;
+  var isWeightSet = false;
+  var isWeightValid;
+  var appendableFamilyName = false;
+
+  if (!values[index]) {
+    throw new InvalidPropertyError('Missing font values at ' + formatPosition(property.all[property.position][1][2][0]) + '. Ignoring.');
+  }
+
+  if (values.length == 1 && values[0][1] == 'inherit') {
+    style.value = variant.value = weight.value = stretch.value = size.value = height.value = family.value = values;
+    return components;
+  }
+
+  if (values.length == 1
+    && (validator.isFontKeyword(values[0][1])
+    || validator.isGlobal(values[0][1])
+    || validator.isPrefixed(values[0][1]))
+  ) {
+    values[0][1] = Marker.INTERNAL + values[0][1];
+    style.value = variant.value = weight.value = stretch.value = size.value = height.value = family.value = values;
+    return components;
+  }
+
+  if (values.length < 2 || !_anyIsFontSize(values, validator) || !_anyIsFontFamily(values, validator)) {
+    throw new InvalidPropertyError('Invalid font values at ' + formatPosition(property.all[property.position][1][2][0]) + '. Ignoring.');
+  }
+
+  if (values.length > 1 && _anyIsInherit(values)) {
+    throw new InvalidPropertyError('Invalid font values at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  // fuzzy match style, variant, weight, and stretch on first elements
+  while (index < fuzzyMatched) {
+    isStretchValid = validator.isFontStretchKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
+    isStyleValid = validator.isFontStyleKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
+    isVariantValid = validator.isFontVariantKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
+    isWeightValid = validator.isFontWeightKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
+
+    if (isStyleValid && !isStyleSet) {
+      style.value = [values[index]];
+      isStyleSet = true;
+    } else if (isVariantValid && !isVariantSet) {
+      variant.value = [values[index]];
+      isVariantSet = true;
+    } else if (isWeightValid && !isWeightSet) {
+      weight.value = [values[index]];
+      isWeightSet = true;
+    } else if (isStretchValid && !isStretchSet) {
+      stretch.value = [values[index]];
+      isStretchSet = true;
+    } else if (isStyleValid
+      && isStyleSet
+      || isVariantValid
+      && isVariantSet
+      || isWeightValid
+      && isWeightSet
+      || isStretchValid
+      && isStretchSet) {
+      throw new InvalidPropertyError('Invalid font style / variant / weight / stretch value at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+    } else {
+      break;
+    }
+
+    index++;
+  }
+
+  // now comes font-size ...
+  if (validator.isFontSizeKeyword(values[index][1])
+    || validator.isUnit(values[index][1])
+    && !validator.isDynamicUnit(values[index][1])) {
+    size.value = [values[index]];
+    index++;
+  } else {
+    throw new InvalidPropertyError('Missing font size at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  if (!values[index]) {
+    throw new InvalidPropertyError('Missing font family at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  // ... and perhaps line-height
+  if (values[index]
+    && values[index][1] == Marker.FORWARD_SLASH
+    && values[index + 1]
+    && (validator.isLineHeightKeyword(values[index + 1][1])
+    || validator.isUnit(values[index + 1][1])
+    || validator.isNumber(values[index + 1][1]))) {
+    height.value = [values[index + 1]];
+    index++;
+    index++;
+  }
+
+  // ... and whatever comes next is font-family
+  family.value = [];
+
+  while (values[index]) {
+    if (values[index][1] == Marker.COMMA) {
+      appendableFamilyName = false;
+    } else {
+      if (appendableFamilyName) {
+        family.value[family.value.length - 1][1] += Marker.SPACE + values[index][1];
+      } else {
+        family.value.push(values[index]);
+      }
+
+      appendableFamilyName = true;
+    }
+
+    index++;
+  }
+
+  if (family.value.length === 0) {
+    throw new InvalidPropertyError('Missing font family at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  return components;
+}
+
+function _anyIsFontSize(values, validator) {
+  var value;
+  var i, l;
+
+  for (i = 0, l = values.length; i < l; i++) {
+    value = values[i];
+
+    if (validator.isFontSizeKeyword(value[1])
+      || validator.isUnit(value[1])
+      && !validator.isDynamicUnit(value[1])
+      || validator.isFunction(value[1])) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function _anyIsFontFamily(values, validator) {
+  var value;
+  var i, l;
+
+  for (i = 0, l = values.length; i < l; i++) {
+    value = values[i];
+
+    if (validator.isIdentifier(value[1]) || validator.isQuotedText(value[1])) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function fourValues(property, configuration) {
+  var componentNames = configuration[property.name].components;
+  var components = [];
+  var value = property.value;
+
+  if (value.length < 1) { return []; }
+
+  if (value.length < 2) { value[1] = value[0].slice(0); }
+  if (value.length < 3) { value[2] = value[0].slice(0); }
+  if (value.length < 4) { value[3] = value[1].slice(0); }
+
+  for (var i = componentNames.length - 1; i >= 0; i--) {
+    var component = wrapSingle([
+      Token.PROPERTY,
+      [Token.PROPERTY_NAME, componentNames[i]]
+    ]);
+    component.value = [value[i]];
+    components.unshift(component);
+  }
+
+  return components;
+}
+
+function multiplex(splitWith) {
+  return function(property, configuration, validator) {
+    var splitsAt = [];
+    var values = property.value;
+    var i, j, l, m;
+
+    // find split commas
+    for (i = 0, l = values.length; i < l; i++) {
+      if (values[i][1] == ',') { splitsAt.push(i); }
+    }
+
+    if (splitsAt.length === 0) { return splitWith(property, configuration, validator); }
+
+    var splitComponents = [];
+
+    // split over commas, and into components
+    for (i = 0, l = splitsAt.length; i <= l; i++) {
+      var from = i === 0 ? 0 : splitsAt[i - 1] + 1;
+      var to = i < l ? splitsAt[i] : values.length;
+
+      var _property = _wrapDefault(property.name, property, configuration);
+      _property.value = values.slice(from, to);
+
+      if (_property.value.length > 0) {
+        splitComponents.push(splitWith(_property, configuration, validator));
+      }
+    }
+
+    var components = splitComponents[0];
+
+    // group component values from each split
+    for (i = 0, l = components.length; i < l; i++) {
+      components[i].multiplex = true;
+
+      for (j = 1, m = splitComponents.length; j < m; j++) {
+        components[i].value.push([Token.PROPERTY_VALUE, Marker.COMMA]);
+        Array.prototype.push.apply(components[i].value, splitComponents[j][i].value);
+      }
+    }
+
+    return components;
+  };
+}
+
+function listStyle(property, configuration, validator) {
+  var type = _wrapDefault('list-style-type', property, configuration);
+  var position = _wrapDefault('list-style-position', property, configuration);
+  var image = _wrapDefault('list-style-image', property, configuration);
+  var components = [type, position, image];
+
+  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
+    type.value = position.value = image.value = [property.value[0]];
+    return components;
+  }
+
+  var values = property.value.slice(0);
+  var total = values.length;
+  var index = 0;
+
+  // `image` first...
+  for (index = 0, total = values.length; index < total; index++) {
+    if (validator.isUrl(values[index][1]) || values[index][1] == '0') {
+      image.value = [values[index]];
+      values.splice(index, 1);
+      break;
+    }
+  }
+
+  // ... then `position`
+  for (index = 0, total = values.length; index < total; index++) {
+    if (validator.isListStylePositionKeyword(values[index][1])) {
+      position.value = [values[index]];
+      values.splice(index, 1);
+      break;
+    }
+  }
+
+  // ... and what's left is a `type`
+  if (values.length > 0 && (validator.isListStyleTypeKeyword(values[0][1]) || validator.isIdentifier(values[0][1]))) {
+    type.value = [values[0]];
+  }
+
+  return components;
+}
+
+function transition(property, configuration, validator) {
+  var prop = _wrapDefault(property.name + '-property', property, configuration);
+  var duration = _wrapDefault(property.name + '-duration', property, configuration);
+  var timing = _wrapDefault(property.name + '-timing-function', property, configuration);
+  var delay = _wrapDefault(property.name + '-delay', property, configuration);
+  var components = [prop, duration, timing, delay];
+  var values = property.value;
+  var value;
+  var durationSet = false;
+  var delaySet = false;
+  var propSet = false;
+  var timingSet = false;
+  var i;
+  var l;
+
+  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
+    prop.value = duration.value = timing.value = delay.value = property.value;
+    return components;
+  }
+
+  if (values.length > 1 && _anyIsInherit(values)) {
+    throw new InvalidPropertyError('Invalid animation values at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
+  }
+
+  for (i = 0, l = values.length; i < l; i++) {
+    value = values[i];
+
+    if (validator.isTime(value[1]) && !durationSet) {
+      duration.value = [value];
+      durationSet = true;
+    } else if (validator.isTime(value[1]) && !delaySet) {
+      delay.value = [value];
+      delaySet = true;
+    } else if ((validator.isGlobal(value[1]) || validator.isTimingFunction(value[1])) && !timingSet) {
+      timing.value = [value];
+      timingSet = true;
+    } else if (validator.isIdentifier(value[1]) && !propSet) {
+      prop.value = [value];
+      propSet = true;
+    } else {
+      throw new InvalidPropertyError('Invalid animation value at ' + formatPosition(value[2][0]) + '. Ignoring.');
+    }
+  }
+
+  return components;
+}
+
+function widthStyleColor(property, configuration, validator) {
+  var descriptor = configuration[property.name];
+  var components = [
+    _wrapDefault(descriptor.components[0], property, configuration),
+    _wrapDefault(descriptor.components[1], property, configuration),
+    _wrapDefault(descriptor.components[2], property, configuration)
+  ];
+  var color, style, width;
+
+  for (var i = 0; i < 3; i++) {
+    var component = components[i];
+
+    if (component.name.indexOf('color') > 0) { color = component; } else if (component.name.indexOf('style') > 0) { style = component; } else { width = component; }
+  }
+
+  if ((property.value.length == 1 && property.value[0][1] == 'inherit')
+      || (property.value.length == 3 && property.value[0][1] == 'inherit' && property.value[1][1] == 'inherit' && property.value[2][1] == 'inherit')) {
+    color.value = style.value = width.value = [property.value[0]];
+    return components;
+  }
+
+  var values = property.value.slice(0);
+  var match, matches;
+
+  // NOTE: usually users don't follow the required order of parts in this shorthand,
+  // so we'll try to parse it caring as little about order as possible
+
+  if (values.length > 0) {
+    matches = values.filter(_widthFilter(validator));
+    match = matches.length > 1 && (matches[0][1] == 'none' || matches[0][1] == 'auto') ? matches[1] : matches[0];
+    if (match) {
+      width.value = [match];
+      values.splice(values.indexOf(match), 1);
+    }
+  }
+
+  if (values.length > 0) {
+    match = values.filter(_styleFilter(validator))[0];
+    if (match) {
+      style.value = [match];
+      values.splice(values.indexOf(match), 1);
+    }
+  }
+
+  if (values.length > 0) {
+    match = values.filter(_colorFilter(validator))[0];
+    if (match) {
+      color.value = [match];
+      values.splice(values.indexOf(match), 1);
+    }
+  }
+
+  return components;
+}
+
+module.exports = {
+  animation: animation,
+  background: background,
+  border: widthStyleColor,
+  borderRadius: borderRadius,
+  font: font,
+  fourValues: fourValues,
+  listStyle: listStyle,
+  multiplex: multiplex,
+  outline: widthStyleColor,
+  transition: transition
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/can-override.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/can-override.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/can-override.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,314 @@
+var understandable = require('./properties/understandable');
+
+function animationIterationCount(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true)
+    && !(validator.isAnimationIterationCountKeyword(value2) || validator.isPositiveNumber(value2))) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  }
+
+  return validator.isAnimationIterationCountKeyword(value2) || validator.isPositiveNumber(value2);
+}
+
+function animationName(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true)
+    && !(validator.isAnimationNameKeyword(value2) || validator.isIdentifier(value2))) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  }
+
+  return validator.isAnimationNameKeyword(value2) || validator.isIdentifier(value2);
+}
+
+function areSameFunction(validator, value1, value2) {
+  if (!validator.isFunction(value1) || !validator.isFunction(value2)) {
+    return false;
+  }
+
+  var function1Name = value1.substring(0, value1.indexOf('('));
+  var function2Name = value2.substring(0, value2.indexOf('('));
+
+  var function1Value = value1.substring(function1Name.length + 1, value1.length - 1);
+  var function2Value = value2.substring(function2Name.length + 1, value2.length - 1);
+
+  if (validator.isFunction(function1Value) || validator.isFunction(function2Value)) {
+    return function1Name === function2Name && areSameFunction(validator, function1Value, function2Value);
+  }
+  return function1Name === function2Name;
+}
+
+function backgroundPosition(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true)
+    && !(validator.isBackgroundPositionKeyword(value2) || validator.isGlobal(value2))) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  } if (validator.isBackgroundPositionKeyword(value2) || validator.isGlobal(value2)) {
+    return true;
+  }
+
+  return unit(validator, value1, value2);
+}
+
+function backgroundSize(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true)
+    && !(validator.isBackgroundSizeKeyword(value2) || validator.isGlobal(value2))) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  } if (validator.isBackgroundSizeKeyword(value2) || validator.isGlobal(value2)) {
+    return true;
+  }
+
+  return unit(validator, value1, value2);
+}
+
+function color(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true) && !validator.isColor(value2)) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  } if (!validator.colorOpacity && (validator.isRgbColor(value1) || validator.isHslColor(value1))) {
+    return false;
+  } if (!validator.colorOpacity && (validator.isRgbColor(value2) || validator.isHslColor(value2))) {
+    return false;
+  } if (!validator.colorHexAlpha && (validator.isHexAlphaColor(value1) || validator.isHexAlphaColor(value2))) {
+    return false;
+  } if (validator.isColor(value1) && validator.isColor(value2)) {
+    return true;
+  }
+
+  return sameFunctionOrValue(validator, value1, value2);
+}
+
+function components(overrideCheckers) {
+  return function(validator, value1, value2, position) {
+    return overrideCheckers[position](validator, value1, value2);
+  };
+}
+
+function fontFamily(validator, value1, value2) {
+  return understandable(validator, value1, value2, 0, true);
+}
+
+function image(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true) && !validator.isImage(value2)) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  } if (validator.isImage(value2)) {
+    return true;
+  } if (validator.isImage(value1)) {
+    return false;
+  }
+
+  return sameFunctionOrValue(validator, value1, value2);
+}
+
+function keyword(propertyName) {
+  return function(validator, value1, value2) {
+    if (!understandable(validator, value1, value2, 0, true) && !validator.isKeyword(propertyName)(value2)) {
+      return false;
+    } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+      return true;
+    }
+
+    return validator.isKeyword(propertyName)(value2);
+  };
+}
+
+function keywordWithGlobal(propertyName) {
+  return function(validator, value1, value2) {
+    if (!understandable(validator, value1, value2, 0, true)
+      && !(validator.isKeyword(propertyName)(value2) || validator.isGlobal(value2))) {
+      return false;
+    } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+      return true;
+    }
+
+    return validator.isKeyword(propertyName)(value2) || validator.isGlobal(value2);
+  };
+}
+
+function propertyName(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true) && !validator.isIdentifier(value2)) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  }
+
+  return validator.isIdentifier(value2);
+}
+
+function sameFunctionOrValue(validator, value1, value2) {
+  return areSameFunction(validator, value1, value2)
+    ? true
+    : value1 === value2;
+}
+
+function textShadow(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true)
+    && !(validator.isUnit(value2)
+    || validator.isColor(value2)
+    || validator.isGlobal(value2))) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  }
+
+  return validator.isUnit(value2) || validator.isColor(value2) || validator.isGlobal(value2);
+}
+
+function time(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true) && !validator.isTime(value2)) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  } if (validator.isTime(value1) && !validator.isTime(value2)) {
+    return false;
+  } if (validator.isTime(value2)) {
+    return true;
+  } if (validator.isTime(value1)) {
+    return false;
+  } if (validator.isFunction(value1)
+    && !validator.isPrefixed(value1)
+    && validator.isFunction(value2)
+    && !validator.isPrefixed(value2)) {
+    return true;
+  }
+
+  return sameFunctionOrValue(validator, value1, value2);
+}
+
+function timingFunction(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true)
+    && !(validator.isTimingFunction(value2) || validator.isGlobal(value2))) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  }
+
+  return validator.isTimingFunction(value2) || validator.isGlobal(value2);
+}
+
+function unit(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true) && !validator.isUnit(value2)) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  } if (validator.isUnit(value1) && !validator.isUnit(value2)) {
+    return false;
+  } if (validator.isUnit(value2)) {
+    return true;
+  } if (validator.isUnit(value1)) {
+    return false;
+  } if (validator.isFunction(value1)
+    && !validator.isPrefixed(value1)
+    && validator.isFunction(value2)
+    && !validator.isPrefixed(value2)) {
+    return true;
+  }
+
+  return sameFunctionOrValue(validator, value1, value2);
+}
+
+function unitOrKeywordWithGlobal(propertyName) {
+  var byKeyword = keywordWithGlobal(propertyName);
+
+  return function(validator, value1, value2) {
+    return unit(validator, value1, value2) || byKeyword(validator, value1, value2);
+  };
+}
+
+function unitOrNumber(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true)
+    && !(validator.isUnit(value2)
+    || validator.isNumber(value2))) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  } if ((validator.isUnit(value1)
+    || validator.isNumber(value1))
+    && !(validator.isUnit(value2)
+    || validator.isNumber(value2))) {
+    return false;
+  } if (validator.isUnit(value2) || validator.isNumber(value2)) {
+    return true;
+  } if (validator.isUnit(value1) || validator.isNumber(value1)) {
+    return false;
+  } if (validator.isFunction(value1)
+    && !validator.isPrefixed(value1)
+    && validator.isFunction(value2)
+    && !validator.isPrefixed(value2)) {
+    return true;
+  }
+
+  return sameFunctionOrValue(validator, value1, value2);
+}
+
+function zIndex(validator, value1, value2) {
+  if (!understandable(validator, value1, value2, 0, true) && !validator.isZIndex(value2)) {
+    return false;
+  } if (validator.isVariable(value1) && validator.isVariable(value2)) {
+    return true;
+  }
+
+  return validator.isZIndex(value2);
+}
+
+module.exports = {
+  generic: {
+    color: color,
+    components: components,
+    image: image,
+    propertyName: propertyName,
+    time: time,
+    timingFunction: timingFunction,
+    unit: unit,
+    unitOrNumber: unitOrNumber
+  },
+  property: {
+    animationDirection: keywordWithGlobal('animation-direction'),
+    animationFillMode: keyword('animation-fill-mode'),
+    animationIterationCount: animationIterationCount,
+    animationName: animationName,
+    animationPlayState: keywordWithGlobal('animation-play-state'),
+    backgroundAttachment: keyword('background-attachment'),
+    backgroundClip: keywordWithGlobal('background-clip'),
+    backgroundOrigin: keyword('background-origin'),
+    backgroundPosition: backgroundPosition,
+    backgroundRepeat: keyword('background-repeat'),
+    backgroundSize: backgroundSize,
+    bottom: unitOrKeywordWithGlobal('bottom'),
+    borderCollapse: keyword('border-collapse'),
+    borderStyle: keywordWithGlobal('*-style'),
+    clear: keywordWithGlobal('clear'),
+    cursor: keywordWithGlobal('cursor'),
+    display: keywordWithGlobal('display'),
+    float: keywordWithGlobal('float'),
+    left: unitOrKeywordWithGlobal('left'),
+    fontFamily: fontFamily,
+    fontStretch: keywordWithGlobal('font-stretch'),
+    fontStyle: keywordWithGlobal('font-style'),
+    fontVariant: keywordWithGlobal('font-variant'),
+    fontWeight: keywordWithGlobal('font-weight'),
+    listStyleType: keywordWithGlobal('list-style-type'),
+    listStylePosition: keywordWithGlobal('list-style-position'),
+    outlineStyle: keywordWithGlobal('*-style'),
+    overflow: keywordWithGlobal('overflow'),
+    position: keywordWithGlobal('position'),
+    right: unitOrKeywordWithGlobal('right'),
+    textAlign: keywordWithGlobal('text-align'),
+    textDecoration: keywordWithGlobal('text-decoration'),
+    textOverflow: keywordWithGlobal('text-overflow'),
+    textShadow: textShadow,
+    top: unitOrKeywordWithGlobal('top'),
+    transform: sameFunctionOrValue,
+    verticalAlign: unitOrKeywordWithGlobal('vertical-align'),
+    visibility: keywordWithGlobal('visibility'),
+    whiteSpace: keywordWithGlobal('white-space'),
+    zIndex: zIndex
+  }
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/properties/understandable.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/properties/understandable.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/properties/understandable.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,15 @@
+var sameVendorPrefixes = require('../../vendor-prefixes').same;
+
+function understandable(validator, value1, value2, _position, isPaired) {
+  if (!sameVendorPrefixes(value1, value2)) {
+    return false;
+  }
+
+  if (isPaired && validator.isVariable(value1) !== validator.isVariable(value2)) {
+    return false;
+  }
+
+  return true;
+}
+
+module.exports = understandable;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/restore.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/restore.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/configuration/restore.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,294 @@
+var shallowClone = require('../clone').shallow;
+
+var Token = require('../../tokenizer/token');
+var Marker = require('../../tokenizer/marker');
+
+function isInheritOnly(values) {
+  for (var i = 0, l = values.length; i < l; i++) {
+    var value = values[i][1];
+
+    if (value != 'inherit' && value != Marker.COMMA && value != Marker.FORWARD_SLASH) { return false; }
+  }
+
+  return true;
+}
+
+function background(property, configuration, lastInMultiplex) {
+  var components = property.components;
+  var restored = [];
+  var needsOne, needsBoth;
+
+  function restoreValue(component) {
+    Array.prototype.unshift.apply(restored, component.value);
+  }
+
+  function isDefaultValue(component) {
+    var descriptor = configuration[component.name];
+
+    if (descriptor.doubleValues && descriptor.defaultValue.length == 1) {
+      return component.value[0][1] == descriptor.defaultValue[0]
+        && (component.value[1]
+          ? component.value[1][1] == descriptor.defaultValue[0]
+          : true);
+    } if (descriptor.doubleValues && descriptor.defaultValue.length != 1) {
+      return component.value[0][1] == descriptor.defaultValue[0]
+      && ((component.value[1] ? component.value[1][1] : component.value[0][1])
+        == descriptor.defaultValue[1]);
+    }
+    return component.value[0][1] == descriptor.defaultValue;
+  }
+
+  for (var i = components.length - 1; i >= 0; i--) {
+    var component = components[i];
+    var isDefault = isDefaultValue(component);
+
+    if (component.name == 'background-clip') {
+      var originComponent = components[i - 1];
+      var isOriginDefault = isDefaultValue(originComponent);
+
+      needsOne = component.value[0][1] == originComponent.value[0][1];
+
+      needsBoth = !needsOne && (
+        (isOriginDefault && !isDefault)
+        || (!isOriginDefault && !isDefault)
+        || (!isOriginDefault && isDefault && component.value[0][1] != originComponent.value[0][1]));
+
+      if (needsOne) {
+        restoreValue(originComponent);
+      } else if (needsBoth) {
+        restoreValue(component);
+        restoreValue(originComponent);
+      }
+
+      i--;
+    } else if (component.name == 'background-size') {
+      var positionComponent = components[i - 1];
+      var isPositionDefault = isDefaultValue(positionComponent);
+
+      needsOne = !isPositionDefault && isDefault;
+
+      needsBoth = !needsOne
+        && (isPositionDefault && !isDefault || !isPositionDefault && !isDefault);
+
+      if (needsOne) {
+        restoreValue(positionComponent);
+      } else if (needsBoth) {
+        restoreValue(component);
+        restored.unshift([Token.PROPERTY_VALUE, Marker.FORWARD_SLASH]);
+        restoreValue(positionComponent);
+      } else if (positionComponent.value.length == 1) {
+        restoreValue(positionComponent);
+      }
+
+      i--;
+    } else {
+      if (isDefault || configuration[component.name].multiplexLastOnly && !lastInMultiplex) { continue; }
+
+      restoreValue(component);
+    }
+  }
+
+  if (restored.length === 0 && property.value.length == 1 && property.value[0][1] == '0') { restored.push(property.value[0]); }
+
+  if (restored.length === 0) { restored.push([Token.PROPERTY_VALUE, configuration[property.name].defaultValue]); }
+
+  if (isInheritOnly(restored)) { return [restored[0]]; }
+
+  return restored;
+}
+
+function borderRadius(property) {
+  if (property.multiplex) {
+    var horizontal = shallowClone(property);
+    var vertical = shallowClone(property);
+
+    for (var i = 0; i < 4; i++) {
+      var component = property.components[i];
+
+      var horizontalComponent = shallowClone(property);
+      horizontalComponent.value = [component.value[0]];
+      horizontal.components.push(horizontalComponent);
+
+      var verticalComponent = shallowClone(property);
+      // FIXME: only shorthand compactor (see breakup#borderRadius) knows that border radius
+      // longhands have two values, whereas tokenizer does not care about populating 2nd value
+      // if it's missing, hence this fallback
+      verticalComponent.value = [component.value[1] || component.value[0]];
+      vertical.components.push(verticalComponent);
+    }
+
+    var horizontalValues = fourValues(horizontal);
+    var verticalValues = fourValues(vertical);
+
+    if (horizontalValues.length == verticalValues.length
+        && horizontalValues[0][1] == verticalValues[0][1]
+        && (horizontalValues.length > 1 ? horizontalValues[1][1] == verticalValues[1][1] : true)
+        && (horizontalValues.length > 2 ? horizontalValues[2][1] == verticalValues[2][1] : true)
+        && (horizontalValues.length > 3 ? horizontalValues[3][1] == verticalValues[3][1] : true)) {
+      return horizontalValues;
+    }
+    return horizontalValues.concat([[Token.PROPERTY_VALUE, Marker.FORWARD_SLASH]]).concat(verticalValues);
+  }
+  return fourValues(property);
+}
+
+function font(property, configuration) {
+  var components = property.components;
+  var restored = [];
+  var component;
+  var componentIndex = 0;
+  var fontFamilyIndex = 0;
+
+  if (property.value[0][1].indexOf(Marker.INTERNAL) === 0) {
+    property.value[0][1] = property.value[0][1].substring(Marker.INTERNAL.length);
+    return property.value;
+  }
+
+  // first four components are optional
+  while (componentIndex < 4) {
+    component = components[componentIndex];
+
+    if (component.value[0][1] != configuration[component.name].defaultValue) {
+      Array.prototype.push.apply(restored, component.value);
+    }
+
+    componentIndex++;
+  }
+
+  // then comes font-size
+  Array.prototype.push.apply(restored, components[componentIndex].value);
+  componentIndex++;
+
+  // then may come line-height
+  if (components[componentIndex].value[0][1] != configuration[components[componentIndex].name].defaultValue) {
+    Array.prototype.push.apply(restored, [[Token.PROPERTY_VALUE, Marker.FORWARD_SLASH]]);
+    Array.prototype.push.apply(restored, components[componentIndex].value);
+  }
+
+  componentIndex++;
+
+  // then comes font-family
+  while (components[componentIndex].value[fontFamilyIndex]) {
+    restored.push(components[componentIndex].value[fontFamilyIndex]);
+
+    if (components[componentIndex].value[fontFamilyIndex + 1]) {
+      restored.push([Token.PROPERTY_VALUE, Marker.COMMA]);
+    }
+
+    fontFamilyIndex++;
+  }
+
+  if (isInheritOnly(restored)) {
+    return [restored[0]];
+  }
+
+  return restored;
+}
+
+function fourValues(property) {
+  var components = property.components;
+  var value1 = components[0].value[0];
+  var value2 = components[1].value[0];
+  var value3 = components[2].value[0];
+  var value4 = components[3].value[0];
+
+  if (value1[1] == value2[1] && value1[1] == value3[1] && value1[1] == value4[1]) {
+    return [value1];
+  } if (value1[1] == value3[1] && value2[1] == value4[1]) {
+    return [value1, value2];
+  } if (value2[1] == value4[1]) {
+    return [value1, value2, value3];
+  }
+  return [value1, value2, value3, value4];
+}
+
+function multiplex(restoreWith) {
+  return function(property, configuration) {
+    if (!property.multiplex) { return restoreWith(property, configuration, true); }
+
+    var multiplexSize = 0;
+    var restored = [];
+    var componentMultiplexSoFar = {};
+    var i, l;
+
+    // At this point we don't know what's the multiplex size, e.g. how many background layers are there
+    for (i = 0, l = property.components[0].value.length; i < l; i++) {
+      if (property.components[0].value[i][1] == Marker.COMMA) { multiplexSize++; }
+    }
+
+    for (i = 0; i <= multiplexSize; i++) {
+      var _property = shallowClone(property);
+
+      // We split multiplex into parts and restore them one by one
+      for (var j = 0, m = property.components.length; j < m; j++) {
+        var componentToClone = property.components[j];
+        var _component = shallowClone(componentToClone);
+        _property.components.push(_component);
+
+        // The trick is some properties has more than one value, so we iterate over values looking for
+        // a multiplex separator - a comma
+        for (var k = componentMultiplexSoFar[_component.name] || 0, n = componentToClone.value.length; k < n; k++) {
+          if (componentToClone.value[k][1] == Marker.COMMA) {
+            componentMultiplexSoFar[_component.name] = k + 1;
+            break;
+          }
+
+          _component.value.push(componentToClone.value[k]);
+        }
+      }
+
+      // No we can restore shorthand value
+      var lastInMultiplex = i == multiplexSize;
+      var _restored = restoreWith(_property, configuration, lastInMultiplex);
+      Array.prototype.push.apply(restored, _restored);
+
+      if (i < multiplexSize) { restored.push([Token.PROPERTY_VALUE, Marker.COMMA]); }
+    }
+
+    return restored;
+  };
+}
+
+function withoutDefaults(property, configuration) {
+  var components = property.components;
+  var restored = [];
+
+  for (var i = components.length - 1; i >= 0; i--) {
+    var component = components[i];
+    var descriptor = configuration[component.name];
+
+    if (component.value[0][1] != descriptor.defaultValue || ('keepUnlessDefault' in descriptor) && !isDefault(components, configuration, descriptor.keepUnlessDefault)) {
+      restored.unshift(component.value[0]);
+    }
+  }
+
+  if (restored.length === 0) { restored.push([Token.PROPERTY_VALUE, configuration[property.name].defaultValue]); }
+
+  if (isInheritOnly(restored)) { return [restored[0]]; }
+
+  return restored;
+}
+
+function isDefault(components, configuration, propertyName) {
+  var component;
+  var i, l;
+
+  for (i = 0, l = components.length; i < l; i++) {
+    component = components[i];
+
+    if (component.name == propertyName && component.value[0][1] == configuration[propertyName].defaultValue) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+module.exports = {
+  background: background,
+  borderRadius: borderRadius,
+  font: font,
+  fourValues: fourValues,
+  multiplex: multiplex,
+  withoutDefaults: withoutDefaults
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/hack.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/hack.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/hack.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,8 @@
+var Hack = {
+  ASTERISK: 'asterisk',
+  BANG: 'bang',
+  BACKSLASH: 'backslash',
+  UNDERSCORE: 'underscore'
+};
+
+module.exports = Hack;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/invalid-property-error.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/invalid-property-error.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/invalid-property-error.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,10 @@
+function InvalidPropertyError(message) {
+  this.name = 'InvalidPropertyError';
+  this.message = message;
+  this.stack = (new Error()).stack;
+}
+
+InvalidPropertyError.prototype = Object.create(Error.prototype);
+InvalidPropertyError.prototype.constructor = InvalidPropertyError;
+
+module.exports = InvalidPropertyError;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-0/optimize.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-0/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-0/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,6 @@
+function level0Optimize(tokens) {
+  // noop as level 0 means no optimizations!
+  return tokens;
+}
+
+module.exports = level0Optimize;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/optimize.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,325 @@
+var sortSelectors = require('./sort-selectors');
+var tidyRules = require('./tidy-rules');
+var tidyBlock = require('./tidy-block');
+var tidyAtRule = require('./tidy-at-rule');
+
+var Hack = require('../hack');
+var removeUnused = require('../remove-unused');
+var restoreFromOptimizing = require('../restore-from-optimizing');
+var wrapForOptimizing = require('../wrap-for-optimizing').all;
+
+var configuration = require('../configuration');
+var optimizers = require('./value-optimizers');
+
+var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
+
+var Token = require('../../tokenizer/token');
+var Marker = require('../../tokenizer/marker');
+
+var formatPosition = require('../../utils/format-position');
+
+var serializeRules = require('../../writer/one-time').rules;
+
+var CHARSET_TOKEN = '@charset';
+var CHARSET_REGEXP = new RegExp('^' + CHARSET_TOKEN, 'i');
+
+var DEFAULT_ROUNDING_PRECISION = require('../../options/rounding-precision').DEFAULT;
+
+var VARIABLE_PROPERTY_NAME_PATTERN = /^--\S+$/;
+var PROPERTY_NAME_PATTERN = /^(?:-chrome-|-[\w-]+\w|\w[\w-]+\w|\w{1,})$/;
+var IMPORT_PREFIX_PATTERN = /^@import/i;
+var URL_PREFIX_PATTERN = /^url\(/i;
+
+function startsAsUrl(value) {
+  return URL_PREFIX_PATTERN.test(value);
+}
+
+function isImport(token) {
+  return IMPORT_PREFIX_PATTERN.test(token[1]);
+}
+
+function isLegacyFilter(property) {
+  var value;
+
+  if (property.name == 'filter' || property.name == '-ms-filter') {
+    value = property.value[0][1];
+
+    return value.indexOf('progid') > -1
+      || value.indexOf('alpha') === 0
+      || value.indexOf('chroma') === 0;
+  }
+  return false;
+}
+
+function noop() {}
+
+function noopValueOptimizer(_name, value, _options) { return value; }
+
+function optimizeBody(rule, properties, context) {
+  var options = context.options;
+  var valueOptimizers;
+  var property, name, type, value;
+  var propertyToken;
+  var propertyOptimizer;
+  var serializedRule = serializeRules(rule);
+  var _properties = wrapForOptimizing(properties);
+  var pluginValueOptimizers = context.options.plugins.level1Value;
+  var pluginPropertyOptimizers = context.options.plugins.level1Property;
+  var isVariable;
+  var i, l;
+
+  for (i = 0, l = _properties.length; i < l; i++) {
+    var j, k, m, n;
+
+    property = _properties[i];
+    name = property.name;
+    propertyOptimizer = configuration[name] && configuration[name].propertyOptimizer || noop;
+    valueOptimizers = configuration[name] && configuration[name].valueOptimizers || [optimizers.whiteSpace];
+    isVariable = VARIABLE_PROPERTY_NAME_PATTERN.test(name);
+
+    if (isVariable) {
+      valueOptimizers = options.variableOptimizers.length > 0
+        ? options.variableOptimizers
+        : [optimizers.whiteSpace];
+    }
+
+    if (!isVariable && !PROPERTY_NAME_PATTERN.test(name)) {
+      propertyToken = property.all[property.position];
+      context.warnings.push('Invalid property name \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.');
+      property.unused = true;
+      continue;
+    }
+
+    if (property.value.length === 0) {
+      propertyToken = property.all[property.position];
+      context.warnings.push('Empty property \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.');
+      property.unused = true;
+      continue;
+    }
+
+    if (property.hack && (
+      (property.hack[0] == Hack.ASTERISK || property.hack[0] == Hack.UNDERSCORE)
+        && !options.compatibility.properties.iePrefixHack
+        || property.hack[0] == Hack.BACKSLASH && !options.compatibility.properties.ieSuffixHack
+        || property.hack[0] == Hack.BANG && !options.compatibility.properties.ieBangHack)) {
+      property.unused = true;
+      continue;
+    }
+
+    if (!options.compatibility.properties.ieFilters && isLegacyFilter(property)) {
+      property.unused = true;
+      continue;
+    }
+
+    if (property.block) {
+      optimizeBody(rule, property.value[0][1], context);
+      continue;
+    }
+
+    for (j = 0, m = property.value.length; j < m; j++) {
+      type = property.value[j][0];
+      value = property.value[j][1];
+
+      if (type == Token.PROPERTY_BLOCK) {
+        property.unused = true;
+        context.warnings.push('Invalid value token at ' + formatPosition(value[0][1][2][0]) + '. Ignoring.');
+        break;
+      }
+
+      if (startsAsUrl(value) && !context.validator.isUrl(value)) {
+        property.unused = true;
+        context.warnings.push('Broken URL \'' + value + '\' at ' + formatPosition(property.value[j][2][0]) + '. Ignoring.');
+        break;
+      }
+
+      for (k = 0, n = valueOptimizers.length; k < n; k++) {
+        value = valueOptimizers[k](name, value, options);
+      }
+
+      for (k = 0, n = pluginValueOptimizers.length; k < n; k++) {
+        value = pluginValueOptimizers[k](name, value, options);
+      }
+
+      property.value[j][1] = value;
+    }
+
+    propertyOptimizer(serializedRule, property, options);
+
+    for (j = 0, m = pluginPropertyOptimizers.length; j < m; j++) {
+      pluginPropertyOptimizers[j](serializedRule, property, options);
+    }
+  }
+
+  restoreFromOptimizing(_properties);
+  removeUnused(_properties);
+  removeComments(properties, options);
+}
+
+function removeComments(tokens, options) {
+  var token;
+  var i;
+
+  for (i = 0; i < tokens.length; i++) {
+    token = tokens[i];
+
+    if (token[0] != Token.COMMENT) {
+      continue;
+    }
+
+    optimizeComment(token, options);
+
+    if (token[1].length === 0) {
+      tokens.splice(i, 1);
+      i--;
+    }
+  }
+}
+
+function optimizeComment(token, options) {
+  if (token[1][2] == Marker.EXCLAMATION && (options.level[OptimizationLevel.One].specialComments == 'all' || options.commentsKept < options.level[OptimizationLevel.One].specialComments)) {
+    options.commentsKept++;
+    return;
+  }
+
+  token[1] = [];
+}
+
+function cleanupCharsets(tokens) {
+  var hasCharset = false;
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    if (token[0] != Token.AT_RULE) { continue; }
+
+    if (!CHARSET_REGEXP.test(token[1])) { continue; }
+
+    if (hasCharset || token[1].indexOf(CHARSET_TOKEN) == -1) {
+      tokens.splice(i, 1);
+      i--;
+      l--;
+    } else {
+      hasCharset = true;
+      tokens.splice(i, 1);
+      tokens.unshift([Token.AT_RULE, token[1].replace(CHARSET_REGEXP, CHARSET_TOKEN)]);
+    }
+  }
+}
+
+function buildUnitRegexp(options) {
+  var units = ['px', 'em', 'ex', 'cm', 'mm', 'in', 'pt', 'pc', '%'];
+  var otherUnits = ['ch', 'rem', 'vh', 'vm', 'vmax', 'vmin', 'vw'];
+
+  otherUnits.forEach(function(unit) {
+    if (options.compatibility.units[unit]) {
+      units.push(unit);
+    }
+  });
+
+  return new RegExp('(^|\\s|\\(|,)0(?:' + units.join('|') + ')(\\W|$)', 'g');
+}
+
+function buildPrecisionOptions(roundingPrecision) {
+  var precisionOptions = {
+    matcher: null,
+    units: {}
+  };
+  var optimizable = [];
+  var unit;
+  var value;
+
+  for (unit in roundingPrecision) {
+    value = roundingPrecision[unit];
+
+    if (value != DEFAULT_ROUNDING_PRECISION) {
+      precisionOptions.units[unit] = {};
+      precisionOptions.units[unit].value = value;
+      precisionOptions.units[unit].multiplier = 10 ** value;
+
+      optimizable.push(unit);
+    }
+  }
+
+  if (optimizable.length > 0) {
+    precisionOptions.enabled = true;
+    precisionOptions.decimalPointMatcher = new RegExp('(\\d)\\.($|' + optimizable.join('|') + ')($|\\W)', 'g');
+    precisionOptions.zeroMatcher = new RegExp('(\\d*)(\\.\\d+)(' + optimizable.join('|') + ')', 'g');
+  }
+
+  return precisionOptions;
+}
+
+function buildVariableOptimizers(options) {
+  return options.level[OptimizationLevel.One].variableValueOptimizers.map(function(optimizer) {
+    if (typeof (optimizer) == 'string') {
+      return optimizers[optimizer] || noopValueOptimizer;
+    }
+
+    return optimizer;
+  });
+}
+
+function level1Optimize(tokens, context) {
+  var options = context.options;
+  var levelOptions = options.level[OptimizationLevel.One];
+  var ie7Hack = options.compatibility.selectors.ie7Hack;
+  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
+  var spaceAfterClosingBrace = options.compatibility.properties.spaceAfterClosingBrace;
+  var format = options.format;
+  var mayHaveCharset = false;
+  var afterRules = false;
+
+  options.unitsRegexp = options.unitsRegexp || buildUnitRegexp(options);
+  options.precision = options.precision || buildPrecisionOptions(levelOptions.roundingPrecision);
+  options.commentsKept = options.commentsKept || 0;
+  options.variableOptimizers = options.variableOptimizers || buildVariableOptimizers(options);
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    switch (token[0]) {
+    case Token.AT_RULE:
+      token[1] = isImport(token) && afterRules ? '' : token[1];
+      token[1] = levelOptions.tidyAtRules ? tidyAtRule(token[1]) : token[1];
+      mayHaveCharset = true;
+      break;
+    case Token.AT_RULE_BLOCK:
+      optimizeBody(token[1], token[2], context);
+      afterRules = true;
+      break;
+    case Token.NESTED_BLOCK:
+      token[1] = levelOptions.tidyBlockScopes ? tidyBlock(token[1], spaceAfterClosingBrace) : token[1];
+      level1Optimize(token[2], context);
+      afterRules = true;
+      break;
+    case Token.COMMENT:
+      optimizeComment(token, options);
+      break;
+    case Token.RULE:
+      token[1] = levelOptions.tidySelectors
+        ? tidyRules(token[1], !ie7Hack, adjacentSpace, format, context.warnings)
+        : token[1];
+      token[1] = token[1].length > 1 ? sortSelectors(token[1], levelOptions.selectorsSortingMethod) : token[1];
+      optimizeBody(token[1], token[2], context);
+      afterRules = true;
+      break;
+    }
+
+    if (token[0] == Token.COMMENT
+      && token[1].length === 0
+      || levelOptions.removeEmpty
+      && (token[1].length === 0 || (token[2] && token[2].length === 0))) {
+      tokens.splice(i, 1);
+      i--;
+      l--;
+    }
+  }
+
+  if (levelOptions.cleanupCharsets && mayHaveCharset) {
+    cleanupCharsets(tokens);
+  }
+
+  return tokens;
+}
+
+module.exports = level1Optimize;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,10 @@
+module.exports = {
+  background: require('./property-optimizers/background').level1.property,
+  boxShadow: require('./property-optimizers/box-shadow').level1.property,
+  borderRadius: require('./property-optimizers/border-radius').level1.property,
+  filter: require('./property-optimizers/filter').level1.property,
+  fontWeight: require('./property-optimizers/font-weight').level1.property,
+  margin: require('./property-optimizers/margin').level1.property,
+  outline: require('./property-optimizers/outline').level1.property,
+  padding: require('./property-optimizers/padding').level1.property
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/background.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/background.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/background.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,23 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function background(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].optimizeBackground) {
+        return;
+      }
+
+      if (values.length == 1 && values[0][1] == 'none') {
+        values[0][1] = '0 0';
+      }
+
+      if (values.length == 1 && values[0][1] == 'transparent') {
+        values[0][1] = '0 0';
+      }
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/border-radius.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/border-radius.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/border-radius.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,29 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function borderRadius(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].optimizeBorderRadius) {
+        return;
+      }
+
+      if (values.length == 3 && values[1][1] == '/' && values[0][1] == values[2][1]) {
+        property.value.splice(1);
+        property.dirty = true;
+      } else if (values.length == 5 && values[2][1] == '/' && values[0][1] == values[3][1] && values[1][1] == values[4][1]) {
+        property.value.splice(2);
+        property.dirty = true;
+      } else if (values.length == 7 && values[3][1] == '/' && values[0][1] == values[4][1] && values[1][1] == values[5][1] && values[2][1] == values[6][1]) {
+        property.value.splice(3);
+        property.dirty = true;
+      } else if (values.length == 9 && values[4][1] == '/' && values[0][1] == values[5][1] && values[1][1] == values[6][1] && values[2][1] == values[7][1] && values[3][1] == values[8][1]) {
+        property.value.splice(4);
+        property.dirty = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/box-shadow.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/box-shadow.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/box-shadow.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,15 @@
+var plugin = {
+  level1: {
+    property: function boxShadow(_rule, property) {
+      var values = property.value;
+
+      // remove multiple zeros
+      if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
+        property.value.splice(2);
+        property.dirty = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/filter.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/filter.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/filter.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,34 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var ALPHA_OR_CHROMA_FILTER_PATTERN = /progid:DXImageTransform\.Microsoft\.(Alpha|Chroma)(\W)/;
+var NO_SPACE_AFTER_COMMA_PATTERN = /,(\S)/g;
+var WHITESPACE_AROUND_EQUALS_PATTERN = / ?= ?/g;
+
+var plugin = {
+  level1: {
+    property: function filter(_rule, property, options) {
+      if (!options.compatibility.properties.ieFilters) {
+        return;
+      }
+
+      if (!options.level[OptimizationLevel.One].optimizeFilter) {
+        return;
+      }
+
+      if (property.value.length == 1) {
+        property.value[0][1] = property.value[0][1].replace(
+          ALPHA_OR_CHROMA_FILTER_PATTERN,
+          function(match, filter, suffix) {
+            return filter.toLowerCase() + suffix;
+          }
+        );
+      }
+
+      property.value[0][1] = property.value[0][1]
+        .replace(NO_SPACE_AFTER_COMMA_PATTERN, ', $1')
+        .replace(WHITESPACE_AROUND_EQUALS_PATTERN, '=');
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/font-weight.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/font-weight.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/font-weight.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,23 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function fontWeight(_rule, property, options) {
+      var value = property.value[0][1];
+
+      if (!options.level[OptimizationLevel.One].optimizeFontWeight) {
+        return;
+      }
+
+      if (value == 'normal') {
+        value = '400';
+      } else if (value == 'bold') {
+        value = '700';
+      }
+
+      property.value[0][1] = value;
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/margin.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/margin.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/margin.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,21 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function margin(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].replaceMultipleZeros) {
+        return;
+      }
+
+      // remove multiple zeros
+      if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
+        property.value.splice(1);
+        property.dirty = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/outline.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/outline.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/outline.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,19 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function outline(_rule, property, options) {
+      var values = property.value;
+
+      if (!options.level[OptimizationLevel.One].optimizeOutline) {
+        return;
+      }
+
+      if (values.length == 1 && values[0][1] == 'none') {
+        values[0][1] = '0';
+      }
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/padding.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/padding.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/property-optimizers/padding.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,32 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+function isNegative(value) {
+  return value && value[1][0] == '-' && parseFloat(value[1]) < 0;
+}
+
+var plugin = {
+  level1: {
+    property: function padding(_rule, property, options) {
+      var values = property.value;
+
+      // remove multiple zeros
+      if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
+        property.value.splice(1);
+        property.dirty = true;
+      }
+
+      // remove negative paddings
+      if (options.level[OptimizationLevel.One].removeNegativePaddings
+        && (
+          isNegative(property.value[0])
+          || isNegative(property.value[1])
+          || isNegative(property.value[2])
+          || isNegative(property.value[3])
+        )) {
+        property.unused = true;
+      }
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/sort-selectors.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/sort-selectors.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/sort-selectors.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,23 @@
+var naturalCompare = require('../../utils/natural-compare');
+
+function naturalSorter(scope1, scope2) {
+  return naturalCompare(scope1[1], scope2[1]);
+}
+
+function standardSorter(scope1, scope2) {
+  return scope1[1] > scope2[1] ? 1 : -1;
+}
+
+function sortSelectors(selectors, method) {
+  switch (method) {
+  case 'natural':
+    return selectors.sort(naturalSorter);
+  case 'standard':
+    return selectors.sort(standardSorter);
+  case 'none':
+  case false:
+    return selectors;
+  }
+}
+
+module.exports = sortSelectors;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-at-rule.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-at-rule.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-at-rule.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,9 @@
+function tidyAtRule(value) {
+  return value
+    .replace(/\s+/g, ' ')
+    .replace(/url\(\s+/g, 'url(')
+    .replace(/\s+\)/g, ')')
+    .trim();
+}
+
+module.exports = tidyAtRule;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-block.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-block.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-block.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,34 @@
+var SUPPORTED_COMPACT_BLOCK_MATCHER = /^@media\W/;
+var SUPPORTED_QUOTE_REMOVAL_MATCHER = /^@(?:keyframes|-moz-keyframes|-o-keyframes|-webkit-keyframes)\W/;
+
+function tidyBlock(values, spaceAfterClosingBrace) {
+  var withoutSpaceAfterClosingBrace;
+  var withoutQuotes;
+  var i;
+
+  for (i = values.length - 1; i >= 0; i--) {
+    withoutSpaceAfterClosingBrace = !spaceAfterClosingBrace && SUPPORTED_COMPACT_BLOCK_MATCHER.test(values[i][1]);
+    withoutQuotes = SUPPORTED_QUOTE_REMOVAL_MATCHER.test(values[i][1]);
+
+    values[i][1] = values[i][1]
+      .replace(/\n|\r\n/g, ' ')
+      .replace(/\s+/g, ' ')
+      .replace(/(,|:|\() /g, '$1')
+      .replace(/ \)/g, ')');
+
+    if (withoutQuotes) {
+      values[i][1] = values[i][1]
+        .replace(/'([a-zA-Z][a-zA-Z\d\-_]+)'/, '$1')
+        .replace(/"([a-zA-Z][a-zA-Z\d\-_]+)"/, '$1');
+    }
+
+    if (withoutSpaceAfterClosingBrace) {
+      values[i][1] = values[i][1]
+        .replace(/\) /g, ')');
+    }
+  }
+
+  return values;
+}
+
+module.exports = tidyBlock;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-rules.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-rules.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/tidy-rules.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,265 @@
+var Spaces = require('../../options/format').Spaces;
+var Marker = require('../../tokenizer/marker');
+var formatPosition = require('../../utils/format-position');
+
+var CASE_ATTRIBUTE_PATTERN = /[\s"'][iI]\s*\]/;
+var CASE_RESTORE_PATTERN = /([\d\w])([iI])\]/g;
+var DOUBLE_QUOTE_CASE_PATTERN = /="([a-zA-Z][a-zA-Z\d\-_]+)"([iI])/g;
+var DOUBLE_QUOTE_PATTERN = /="([a-zA-Z][a-zA-Z\d\-_]+)"(\s|\])/g;
+var HTML_COMMENT_PATTERN = /^(?:(?:<!--|-->)\s*)+/;
+var SINGLE_QUOTE_CASE_PATTERN = /='([a-zA-Z][a-zA-Z\d\-_]+)'([iI])/g;
+var SINGLE_QUOTE_PATTERN = /='([a-zA-Z][a-zA-Z\d\-_]+)'(\s|\])/g;
+var RELATION_PATTERN = /[>+~]/;
+var WHITESPACE_PATTERN = /\s/;
+
+var ASTERISK_PLUS_HTML_HACK = '*+html ';
+var ASTERISK_FIRST_CHILD_PLUS_HTML_HACK = '*:first-child+html ';
+var LESS_THAN = '<';
+
+var PSEUDO_CLASSES_WITH_SELECTORS = [
+  ':current',
+  ':future',
+  ':has',
+  ':host',
+  ':host-context',
+  ':is',
+  ':not',
+  ':past',
+  ':where'
+];
+
+function hasInvalidCharacters(value) {
+  var isEscaped;
+  var isInvalid = false;
+  var character;
+  var isQuote = false;
+  var i, l;
+
+  for (i = 0, l = value.length; i < l; i++) {
+    character = value[i];
+
+    if (isEscaped) {
+      // continue as always
+    } else if (character == Marker.SINGLE_QUOTE || character == Marker.DOUBLE_QUOTE) {
+      isQuote = !isQuote;
+    } else if (!isQuote
+      && (character == Marker.CLOSE_CURLY_BRACKET
+        || character == Marker.EXCLAMATION
+        || character == LESS_THAN
+        || character == Marker.SEMICOLON)
+    ) {
+      isInvalid = true;
+      break;
+    } else if (!isQuote && i === 0 && RELATION_PATTERN.test(character)) {
+      isInvalid = true;
+      break;
+    }
+
+    isEscaped = character == Marker.BACK_SLASH;
+  }
+
+  return isInvalid;
+}
+
+function removeWhitespace(value, format) {
+  var stripped = [];
+  var character;
+  var isNewLineNix;
+  var isNewLineWin;
+  var isEscaped;
+  var wasEscaped;
+  var isQuoted;
+  var isSingleQuoted;
+  var isDoubleQuoted;
+  var isAttribute;
+  var isRelation;
+  var isWhitespace;
+  var isSpaceAwarePseudoClass;
+  var roundBracketLevel = 0;
+  var wasComma = false;
+  var wasRelation = false;
+  var wasWhitespace = false;
+  var withCaseAttribute = CASE_ATTRIBUTE_PATTERN.test(value);
+  var spaceAroundRelation = format && format.spaces[Spaces.AroundSelectorRelation];
+  var i, l;
+
+  for (i = 0, l = value.length; i < l; i++) {
+    character = value[i];
+
+    isNewLineNix = character == Marker.NEW_LINE_NIX;
+    isNewLineWin = character == Marker.NEW_LINE_NIX && value[i - 1] == Marker.CARRIAGE_RETURN;
+    isQuoted = isSingleQuoted || isDoubleQuoted;
+    isRelation = !isAttribute && !isEscaped && roundBracketLevel === 0 && RELATION_PATTERN.test(character);
+    isWhitespace = WHITESPACE_PATTERN.test(character);
+    isSpaceAwarePseudoClass = roundBracketLevel == 1 && character == Marker.CLOSE_ROUND_BRACKET
+      ? false
+      : isSpaceAwarePseudoClass
+        || (roundBracketLevel === 0 && character == Marker.COLON && isPseudoClassWithSelectors(value, i));
+
+    if (wasEscaped && isQuoted && isNewLineWin) {
+      // swallow escaped new windows lines in comments
+      stripped.pop();
+      stripped.pop();
+    } else if (isEscaped && isQuoted && isNewLineNix) {
+      // swallow escaped new *nix lines in comments
+      stripped.pop();
+    } else if (isEscaped) {
+      stripped.push(character);
+    } else if (character == Marker.OPEN_SQUARE_BRACKET && !isQuoted) {
+      stripped.push(character);
+      isAttribute = true;
+    } else if (character == Marker.CLOSE_SQUARE_BRACKET && !isQuoted) {
+      stripped.push(character);
+      isAttribute = false;
+    } else if (character == Marker.OPEN_ROUND_BRACKET && !isQuoted) {
+      stripped.push(character);
+      roundBracketLevel++;
+    } else if (character == Marker.CLOSE_ROUND_BRACKET && !isQuoted) {
+      stripped.push(character);
+      roundBracketLevel--;
+    } else if (character == Marker.SINGLE_QUOTE && !isQuoted) {
+      stripped.push(character);
+      isSingleQuoted = true;
+    } else if (character == Marker.DOUBLE_QUOTE && !isQuoted) {
+      stripped.push(character);
+      isDoubleQuoted = true;
+    } else if (character == Marker.SINGLE_QUOTE && isQuoted) {
+      stripped.push(character);
+      isSingleQuoted = false;
+    } else if (character == Marker.DOUBLE_QUOTE && isQuoted) {
+      stripped.push(character);
+      isDoubleQuoted = false;
+    } else if (isWhitespace && wasRelation && !spaceAroundRelation) {
+      continue;
+    } else if (!isWhitespace && wasRelation && spaceAroundRelation) {
+      stripped.push(Marker.SPACE);
+      stripped.push(character);
+    } else if (isWhitespace && !wasWhitespace && wasComma && roundBracketLevel > 0 && isSpaceAwarePseudoClass) {
+      // skip space
+    } else if (isWhitespace && !wasWhitespace && roundBracketLevel > 0 && isSpaceAwarePseudoClass) {
+      stripped.push(character);
+    } else if (isWhitespace && (isAttribute || roundBracketLevel > 0) && !isQuoted) {
+      // skip space
+    } else if (isWhitespace && wasWhitespace && !isQuoted) {
+      // skip extra space
+    } else if ((isNewLineWin || isNewLineNix) && (isAttribute || roundBracketLevel > 0) && isQuoted) {
+      // skip newline
+    } else if (isRelation && wasWhitespace && !spaceAroundRelation) {
+      stripped.pop();
+      stripped.push(character);
+    } else if (isRelation && !wasWhitespace && spaceAroundRelation) {
+      stripped.push(Marker.SPACE);
+      stripped.push(character);
+    } else if (isWhitespace) {
+      stripped.push(Marker.SPACE);
+    } else {
+      stripped.push(character);
+    }
+
+    wasEscaped = isEscaped;
+    isEscaped = character == Marker.BACK_SLASH;
+    wasRelation = isRelation;
+    wasWhitespace = isWhitespace;
+    wasComma = character == Marker.COMMA;
+  }
+
+  return withCaseAttribute
+    ? stripped.join('').replace(CASE_RESTORE_PATTERN, '$1 $2]')
+    : stripped.join('');
+}
+
+function isPseudoClassWithSelectors(value, colonPosition) {
+  var pseudoClass = value.substring(colonPosition, value.indexOf(Marker.OPEN_ROUND_BRACKET, colonPosition));
+
+  return PSEUDO_CLASSES_WITH_SELECTORS.indexOf(pseudoClass) > -1;
+}
+
+function removeQuotes(value) {
+  if (value.indexOf('\'') == -1 && value.indexOf('"') == -1) {
+    return value;
+  }
+
+  return value
+    .replace(SINGLE_QUOTE_CASE_PATTERN, '=$1 $2')
+    .replace(SINGLE_QUOTE_PATTERN, '=$1$2')
+    .replace(DOUBLE_QUOTE_CASE_PATTERN, '=$1 $2')
+    .replace(DOUBLE_QUOTE_PATTERN, '=$1$2');
+}
+
+function replacePseudoClasses(value) {
+  return value
+    .replace('nth-child(1)', 'first-child')
+    .replace('nth-of-type(1)', 'first-of-type')
+    .replace('nth-of-type(even)', 'nth-of-type(2n)')
+    .replace('nth-child(even)', 'nth-child(2n)')
+    .replace('nth-of-type(2n+1)', 'nth-of-type(odd)')
+    .replace('nth-child(2n+1)', 'nth-child(odd)')
+    .replace('nth-last-child(1)', 'last-child')
+    .replace('nth-last-of-type(1)', 'last-of-type')
+    .replace('nth-last-of-type(even)', 'nth-last-of-type(2n)')
+    .replace('nth-last-child(even)', 'nth-last-child(2n)')
+    .replace('nth-last-of-type(2n+1)', 'nth-last-of-type(odd)')
+    .replace('nth-last-child(2n+1)', 'nth-last-child(odd)');
+}
+
+function tidyRules(rules, removeUnsupported, adjacentSpace, format, warnings) {
+  var list = [];
+  var repeated = [];
+
+  function removeHTMLComment(rule, match) {
+    warnings.push('HTML comment \'' + match + '\' at ' + formatPosition(rule[2][0]) + '. Removing.');
+    return '';
+  }
+
+  for (var i = 0, l = rules.length; i < l; i++) {
+    var rule = rules[i];
+    var reduced = rule[1];
+
+    reduced = reduced.replace(HTML_COMMENT_PATTERN, removeHTMLComment.bind(null, rule));
+
+    if (hasInvalidCharacters(reduced)) {
+      warnings.push('Invalid selector \'' + rule[1] + '\' at ' + formatPosition(rule[2][0]) + '. Ignoring.');
+      continue;
+    }
+
+    reduced = removeWhitespace(reduced, format);
+    reduced = removeQuotes(reduced);
+
+    if (adjacentSpace && reduced.indexOf('nav') > 0) {
+      reduced = reduced.replace(/\+nav(\S|$)/, '+ nav$1');
+    }
+
+    if (removeUnsupported && reduced.indexOf(ASTERISK_PLUS_HTML_HACK) > -1) {
+      continue;
+    }
+
+    if (removeUnsupported && reduced.indexOf(ASTERISK_FIRST_CHILD_PLUS_HTML_HACK) > -1) {
+      continue;
+    }
+
+    if (reduced.indexOf('*') > -1) {
+      reduced = reduced
+        .replace(/\*([:#.[])/g, '$1')
+        .replace(/^(:first-child)?\+html/, '*$1+html');
+    }
+
+    if (repeated.indexOf(reduced) > -1) {
+      continue;
+    }
+
+    reduced = replacePseudoClasses(reduced);
+
+    rule[1] = reduced;
+    repeated.push(reduced);
+    list.push(rule);
+  }
+
+  if (list.length == 1 && list[0][1].length === 0) {
+    warnings.push('Empty selector \'' + list[0][1] + '\' at ' + formatPosition(list[0][2][0]) + '. Ignoring.');
+    list = [];
+  }
+
+  return list;
+}
+
+module.exports = tidyRules;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,14 @@
+module.exports = {
+  color: require('./value-optimizers/color').level1.value,
+  degrees: require('./value-optimizers/degrees').level1.value,
+  fraction: require('./value-optimizers/fraction').level1.value,
+  precision: require('./value-optimizers/precision').level1.value,
+  textQuotes: require('./value-optimizers/text-quotes').level1.value,
+  time: require('./value-optimizers/time').level1.value,
+  unit: require('./value-optimizers/unit').level1.value,
+  urlPrefix: require('./value-optimizers/url-prefix').level1.value,
+  urlQuotes: require('./value-optimizers/url-quotes').level1.value,
+  urlWhiteSpace: require('./value-optimizers/url-whitespace').level1.value,
+  whiteSpace: require('./value-optimizers/whitespace').level1.value,
+  zero: require('./value-optimizers/zero').level1.value
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,89 @@
+var shortenHex = require('./color/shorten-hex');
+var shortenHsl = require('./color/shorten-hsl');
+var shortenRgb = require('./color/shorten-rgb');
+
+var split = require('../../../utils/split');
+
+var ANY_COLOR_FUNCTION_PATTERN = /(rgb|rgba|hsl|hsla)\(([^()]+)\)/gi;
+var COLOR_PREFIX_PATTERN = /#|rgb|hsl/gi;
+var HEX_LONG_PATTERN = /(^|[^='"])#([0-9a-f]{6})/gi;
+var HEX_SHORT_PATTERN = /(^|[^='"])#([0-9a-f]{3})/gi;
+var HEX_VALUE_PATTERN = /[0-9a-f]/i;
+var HSL_PATTERN = /hsl\((-?\d+),(-?\d+)%?,(-?\d+)%?\)/gi;
+var RGBA_HSLA_PATTERN = /(rgb|hsl)a?\((-?\d+),(-?\d+%?),(-?\d+%?),(0*[1-9]+[0-9]*(\.?\d*)?)\)/gi;
+var RGB_PATTERN = /rgb\((-?\d+),(-?\d+),(-?\d+)\)/gi;
+var TRANSPARENT_FUNCTION_PATTERN = /(?:rgba|hsla)\(0,0%?,0%?,0\)/g;
+
+var plugin = {
+  level1: {
+    value: function color(name, value, options) {
+      if (!options.compatibility.properties.colors) {
+        return value;
+      }
+
+      if (!value.match(COLOR_PREFIX_PATTERN)) {
+        return shortenHex(value);
+      }
+
+      value = value
+        .replace(RGBA_HSLA_PATTERN, function(match, colorFn, p1, p2, p3, alpha) {
+          return (parseInt(alpha) >= 1 ? colorFn + '(' + [p1, p2, p3].join(',') + ')' : match);
+        })
+        .replace(RGB_PATTERN, function(match, red, green, blue) {
+          return shortenRgb(red, green, blue);
+        })
+        .replace(HSL_PATTERN, function(match, hue, saturation, lightness) {
+          return shortenHsl(hue, saturation, lightness);
+        })
+        .replace(HEX_LONG_PATTERN, function(match, prefix, color, at, inputValue) {
+          var suffix = inputValue[at + match.length];
+
+          if (suffix && HEX_VALUE_PATTERN.test(suffix)) {
+            return match;
+          } if (color[0] == color[1] && color[2] == color[3] && color[4] == color[5]) {
+            return (prefix + '#' + color[0] + color[2] + color[4]).toLowerCase();
+          }
+          return (prefix + '#' + color).toLowerCase();
+        })
+        .replace(HEX_SHORT_PATTERN, function(match, prefix, color) {
+          return prefix + '#' + color.toLowerCase();
+        })
+        .replace(ANY_COLOR_FUNCTION_PATTERN, function(match, colorFunction, colorDef) {
+          var tokens = colorDef.split(',');
+          var colorFnLowercase = colorFunction && colorFunction.toLowerCase();
+          var applies = (colorFnLowercase == 'hsl' && tokens.length == 3)
+            || (colorFnLowercase == 'hsla' && tokens.length == 4)
+            || (colorFnLowercase == 'rgb' && tokens.length === 3 && colorDef.indexOf('%') > 0)
+            || (colorFnLowercase == 'rgba' && tokens.length == 4 && tokens[0].indexOf('%') > 0);
+
+          if (!applies) {
+            return match;
+          }
+
+          if (tokens[1].indexOf('%') == -1) {
+            tokens[1] += '%';
+          }
+
+          if (tokens[2].indexOf('%') == -1) {
+            tokens[2] += '%';
+          }
+
+          return colorFunction + '(' + tokens.join(',') + ')';
+        });
+
+      if (options.compatibility.colors.opacity && name.indexOf('background') == -1) {
+        value = value.replace(TRANSPARENT_FUNCTION_PATTERN, function(match) {
+          if (split(value, ',').pop().indexOf('gradient(') > -1) {
+            return match;
+          }
+
+          return 'transparent';
+        });
+      }
+
+      return shortenHex(value);
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-hex.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-hex.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-hex.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,189 @@
+var COLORS = {
+  aliceblue: '#f0f8ff',
+  antiquewhite: '#faebd7',
+  aqua: '#0ff',
+  aquamarine: '#7fffd4',
+  azure: '#f0ffff',
+  beige: '#f5f5dc',
+  bisque: '#ffe4c4',
+  black: '#000',
+  blanchedalmond: '#ffebcd',
+  blue: '#00f',
+  blueviolet: '#8a2be2',
+  brown: '#a52a2a',
+  burlywood: '#deb887',
+  cadetblue: '#5f9ea0',
+  chartreuse: '#7fff00',
+  chocolate: '#d2691e',
+  coral: '#ff7f50',
+  cornflowerblue: '#6495ed',
+  cornsilk: '#fff8dc',
+  crimson: '#dc143c',
+  cyan: '#0ff',
+  darkblue: '#00008b',
+  darkcyan: '#008b8b',
+  darkgoldenrod: '#b8860b',
+  darkgray: '#a9a9a9',
+  darkgreen: '#006400',
+  darkgrey: '#a9a9a9',
+  darkkhaki: '#bdb76b',
+  darkmagenta: '#8b008b',
+  darkolivegreen: '#556b2f',
+  darkorange: '#ff8c00',
+  darkorchid: '#9932cc',
+  darkred: '#8b0000',
+  darksalmon: '#e9967a',
+  darkseagreen: '#8fbc8f',
+  darkslateblue: '#483d8b',
+  darkslategray: '#2f4f4f',
+  darkslategrey: '#2f4f4f',
+  darkturquoise: '#00ced1',
+  darkviolet: '#9400d3',
+  deeppink: '#ff1493',
+  deepskyblue: '#00bfff',
+  dimgray: '#696969',
+  dimgrey: '#696969',
+  dodgerblue: '#1e90ff',
+  firebrick: '#b22222',
+  floralwhite: '#fffaf0',
+  forestgreen: '#228b22',
+  fuchsia: '#f0f',
+  gainsboro: '#dcdcdc',
+  ghostwhite: '#f8f8ff',
+  gold: '#ffd700',
+  goldenrod: '#daa520',
+  gray: '#808080',
+  green: '#008000',
+  greenyellow: '#adff2f',
+  grey: '#808080',
+  honeydew: '#f0fff0',
+  hotpink: '#ff69b4',
+  indianred: '#cd5c5c',
+  indigo: '#4b0082',
+  ivory: '#fffff0',
+  khaki: '#f0e68c',
+  lavender: '#e6e6fa',
+  lavenderblush: '#fff0f5',
+  lawngreen: '#7cfc00',
+  lemonchiffon: '#fffacd',
+  lightblue: '#add8e6',
+  lightcoral: '#f08080',
+  lightcyan: '#e0ffff',
+  lightgoldenrodyellow: '#fafad2',
+  lightgray: '#d3d3d3',
+  lightgreen: '#90ee90',
+  lightgrey: '#d3d3d3',
+  lightpink: '#ffb6c1',
+  lightsalmon: '#ffa07a',
+  lightseagreen: '#20b2aa',
+  lightskyblue: '#87cefa',
+  lightslategray: '#778899',
+  lightslategrey: '#778899',
+  lightsteelblue: '#b0c4de',
+  lightyellow: '#ffffe0',
+  lime: '#0f0',
+  limegreen: '#32cd32',
+  linen: '#faf0e6',
+  magenta: '#ff00ff',
+  maroon: '#800000',
+  mediumaquamarine: '#66cdaa',
+  mediumblue: '#0000cd',
+  mediumorchid: '#ba55d3',
+  mediumpurple: '#9370db',
+  mediumseagreen: '#3cb371',
+  mediumslateblue: '#7b68ee',
+  mediumspringgreen: '#00fa9a',
+  mediumturquoise: '#48d1cc',
+  mediumvioletred: '#c71585',
+  midnightblue: '#191970',
+  mintcream: '#f5fffa',
+  mistyrose: '#ffe4e1',
+  moccasin: '#ffe4b5',
+  navajowhite: '#ffdead',
+  navy: '#000080',
+  oldlace: '#fdf5e6',
+  olive: '#808000',
+  olivedrab: '#6b8e23',
+  orange: '#ffa500',
+  orangered: '#ff4500',
+  orchid: '#da70d6',
+  palegoldenrod: '#eee8aa',
+  palegreen: '#98fb98',
+  paleturquoise: '#afeeee',
+  palevioletred: '#db7093',
+  papayawhip: '#ffefd5',
+  peachpuff: '#ffdab9',
+  peru: '#cd853f',
+  pink: '#ffc0cb',
+  plum: '#dda0dd',
+  powderblue: '#b0e0e6',
+  purple: '#800080',
+  rebeccapurple: '#663399',
+  red: '#f00',
+  rosybrown: '#bc8f8f',
+  royalblue: '#4169e1',
+  saddlebrown: '#8b4513',
+  salmon: '#fa8072',
+  sandybrown: '#f4a460',
+  seagreen: '#2e8b57',
+  seashell: '#fff5ee',
+  sienna: '#a0522d',
+  silver: '#c0c0c0',
+  skyblue: '#87ceeb',
+  slateblue: '#6a5acd',
+  slategray: '#708090',
+  slategrey: '#708090',
+  snow: '#fffafa',
+  springgreen: '#00ff7f',
+  steelblue: '#4682b4',
+  tan: '#d2b48c',
+  teal: '#008080',
+  thistle: '#d8bfd8',
+  tomato: '#ff6347',
+  turquoise: '#40e0d0',
+  violet: '#ee82ee',
+  wheat: '#f5deb3',
+  white: '#fff',
+  whitesmoke: '#f5f5f5',
+  yellow: '#ff0',
+  yellowgreen: '#9acd32'
+};
+
+var toHex = {};
+var toName = {};
+
+for (var name in COLORS) {
+  var hex = COLORS[name];
+
+  if (name.length < hex.length) {
+    toName[hex] = name;
+  } else {
+    toHex[name] = hex;
+  }
+}
+
+var toHexPattern = new RegExp('(^| |,|\\))(' + Object.keys(toHex).join('|') + ')( |,|\\)|$)', 'ig');
+var toNamePattern = new RegExp('(' + Object.keys(toName).join('|') + ')([^a-f0-9]|$)', 'ig');
+
+function hexConverter(match, prefix, colorValue, suffix) {
+  return prefix + toHex[colorValue.toLowerCase()] + suffix;
+}
+
+function nameConverter(match, colorValue, suffix) {
+  return toName[colorValue.toLowerCase()] + suffix;
+}
+
+function shortenHex(value) {
+  var hasHex = value.indexOf('#') > -1;
+  var shortened = value.replace(toHexPattern, hexConverter);
+
+  if (shortened != value) {
+    shortened = shortened.replace(toHexPattern, hexConverter);
+  }
+
+  return hasHex
+    ? shortened.replace(toNamePattern, nameConverter)
+    : shortened;
+}
+
+module.exports = shortenHex;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-hsl.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-hsl.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-hsl.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,54 @@
+// HSL to RGB converter. Both methods adapted from:
+// http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript
+
+function hslToRgb(h, s, l) {
+  var r, g, b;
+
+  // normalize hue orientation b/w 0 and 360 degrees
+  h %= 360;
+  if (h < 0) { h += 360; }
+  h = ~~h / 360;
+
+  if (s < 0) { s = 0; } else if (s > 100) { s = 100; }
+  s = ~~s / 100;
+
+  if (l < 0) { l = 0; } else if (l > 100) { l = 100; }
+  l = ~~l / 100;
+
+  if (s === 0) {
+    r = g = b = l; // achromatic
+  } else {
+    var q = l < 0.5
+      ? l * (1 + s)
+      : l + s - l * s;
+    var p = 2 * l - q;
+    r = hueToRgb(p, q, h + 1 / 3);
+    g = hueToRgb(p, q, h);
+    b = hueToRgb(p, q, h - 1 / 3);
+  }
+
+  return [~~(r * 255), ~~(g * 255), ~~(b * 255)];
+}
+
+function hueToRgb(p, q, t) {
+  if (t < 0) { t += 1; }
+  if (t > 1) { t -= 1; }
+  if (t < 1 / 6) { return p + (q - p) * 6 * t; }
+  if (t < 1 / 2) { return q; }
+  if (t < 2 / 3) { return p + (q - p) * (2 / 3 - t) * 6; }
+  return p;
+}
+
+function shortenHsl(hue, saturation, lightness) {
+  var asRgb = hslToRgb(hue, saturation, lightness);
+  var redAsHex = asRgb[0].toString(16);
+  var greenAsHex = asRgb[1].toString(16);
+  var blueAsHex = asRgb[2].toString(16);
+
+  return '#'
+    + ((redAsHex.length == 1 ? '0' : '') + redAsHex)
+    + ((greenAsHex.length == 1 ? '0' : '') + greenAsHex)
+    + ((blueAsHex.length == 1 ? '0' : '') + blueAsHex);
+}
+
+module.exports = shortenHsl;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-rgb.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-rgb.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/color/shorten-rgb.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,10 @@
+function shortenRgb(red, green, blue) {
+  var normalizedRed = Math.max(0, Math.min(parseInt(red), 255));
+  var normalizedGreen = Math.max(0, Math.min(parseInt(green), 255));
+  var normalizedBlue = Math.max(0, Math.min(parseInt(blue), 255));
+
+  // Credit: Asen  http://jsbin.com/UPUmaGOc/2/edit?js,console
+  return '#' + ('00000' + (normalizedRed << 16 | normalizedGreen << 8 | normalizedBlue).toString(16)).slice(-6);
+}
+
+module.exports = shortenRgb;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/degrees.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/degrees.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/degrees.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,19 @@
+var ZERO_DEG_PATTERN = /\(0deg\)/g;
+
+var plugin = {
+  level1: {
+    value: function degrees(_name, value, options) {
+      if (!options.compatibility.properties.zeroUnits) {
+        return value;
+      }
+
+      if (value.indexOf('0deg') == -1) {
+        return value;
+      }
+
+      return value.replace(ZERO_DEG_PATTERN, '(0)');
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/fraction.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/fraction.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/fraction.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,72 @@
+var split = require('../../../utils/split');
+var startsAsUrl = require('./starts-as-url');
+
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var EXPRESSION_PATTERN = /^expression\(.*\)$/;
+var ANY_FUNCTION_PATTERN = /^(-(?:moz|ms|o|webkit)-[a-z-]+|[a-z-]+)\((.+)\)$/;
+var TOKEN_SEPARATOR_PATTERN = /([\s,/])/;
+
+var DOT_ZERO_PATTERN = /(^|\D)\.0+(\D|$)/g;
+var FRACTION_PATTERN = /\.([1-9]*)0+(\D|$)/g;
+var LEADING_ZERO_FRACTION_PATTERN = /(^|\D)0\.(\d)/g;
+var MINUS_ZERO_FRACTION_PATTERN = /([^\w\d-]|^)-0([^.]|$)/g;
+var ZERO_PREFIXED_UNIT_PATTERN = /(^|\s)0+([1-9])/g;
+
+function optimizeRecursively(value) {
+  var functionTokens;
+  var tokens;
+
+  if (startsAsUrl(value)) {
+    return value;
+  }
+
+  if (EXPRESSION_PATTERN.test(value)) {
+    return value;
+  }
+
+  functionTokens = ANY_FUNCTION_PATTERN.exec(value);
+
+  if (!functionTokens) {
+    return optimizeFractions(value);
+  }
+
+  tokens = split(functionTokens[2], TOKEN_SEPARATOR_PATTERN)
+    .map(function(token) { return optimizeRecursively(token); });
+
+  return functionTokens[1] + '(' + tokens.join('') + ')';
+}
+
+function optimizeFractions(value) {
+  if (value.indexOf('0') == -1) {
+    return value;
+  }
+
+  if (value.indexOf('-') > -1) {
+    value = value
+      .replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2')
+      .replace(MINUS_ZERO_FRACTION_PATTERN, '$10$2');
+  }
+
+  return value
+    .replace(ZERO_PREFIXED_UNIT_PATTERN, '$1$2')
+    .replace(DOT_ZERO_PATTERN, '$10$2')
+    .replace(FRACTION_PATTERN, function(match, nonZeroPart, suffix) {
+      return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix;
+    })
+    .replace(LEADING_ZERO_FRACTION_PATTERN, '$1.$2');
+}
+
+var plugin = {
+  level1: {
+    value: function fraction(name, value, options) {
+      if (!options.level[OptimizationLevel.One].replaceZeroUnits) {
+        return value;
+      }
+
+      return optimizeRecursively(value);
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/precision.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/precision.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/precision.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,22 @@
+var plugin = {
+  level1: {
+    value: function precision(_name, value, options) {
+      if (!options.precision.enabled || value.indexOf('.') === -1) {
+        return value;
+      }
+
+      return value
+        .replace(options.precision.decimalPointMatcher, '$1$2$3')
+        .replace(options.precision.zeroMatcher, function(match, integerPart, fractionPart, unit) {
+          var multiplier = options.precision.units[unit].multiplier;
+          var parsedInteger = parseInt(integerPart);
+          var integer = Number.isNaN(parsedInteger) ? 0 : parsedInteger;
+          var fraction = parseFloat(fractionPart);
+
+          return Math.round((integer + fraction) * multiplier) / multiplier + unit;
+        });
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/starts-as-url.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/starts-as-url.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/starts-as-url.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,7 @@
+var URL_PREFIX_PATTERN = /^url\(/i;
+
+function startsAsUrl(value) {
+  return URL_PREFIX_PATTERN.test(value);
+}
+
+module.exports = startsAsUrl;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/text-quotes.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/text-quotes.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/text-quotes.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,31 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var LOCAL_PREFIX_PATTERN = /^local\(/i;
+var QUOTED_PATTERN = /^('.*'|".*")$/;
+var QUOTED_BUT_SAFE_PATTERN = /^['"][a-zA-Z][a-zA-Z\d\-_]+['"]$/;
+// eslint-disable-next-line max-len
+var GENERIC_FONT_FAMILY_PATTERN = /^['"](?:cursive|default|emoji|fangsong|fantasy|inherit|initial|math|monospace|revert|revert-layer|sans-serif|serif|system-ui|ui-monospace|ui-rounded|ui-sans-serif|ui-serif|unset)['"]$/;
+
+var plugin = {
+  level1: {
+    value: function textQuotes(name, value, options) {
+      if ((name == 'font-family' || name == 'font') && GENERIC_FONT_FAMILY_PATTERN.test(value)) {
+        return value;
+      }
+
+      if (!options.level[OptimizationLevel.One].removeQuotes) {
+        return value;
+      }
+
+      if (!QUOTED_PATTERN.test(value) && !LOCAL_PREFIX_PATTERN.test(value)) {
+        return value;
+      }
+
+      return QUOTED_BUT_SAFE_PATTERN.test(value)
+        ? value.substring(1, value.length - 1)
+        : value;
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/time.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/time.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/time.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,31 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var TIME_VALUE = /^(-?[\d.]+)(m?s)$/;
+
+var plugin = {
+  level1: {
+    value: function time(name, value, options) {
+      if (!options.level[OptimizationLevel.One].replaceTimeUnits) {
+        return value;
+      }
+
+      if (!TIME_VALUE.test(value)) {
+        return value;
+      }
+
+      return value.replace(TIME_VALUE, function(match, val, unit) {
+        var newValue;
+
+        if (unit == 'ms') {
+          newValue = parseInt(val) / 1000 + 's';
+        } else if (unit == 's') {
+          newValue = parseFloat(val) * 1000 + 'ms';
+        }
+
+        return newValue.length < match.length ? newValue : match;
+      });
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/unit.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/unit.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/unit.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,46 @@
+var WHOLE_PIXEL_VALUE = /(?:^|\s|\()(-?\d+)px/;
+
+var plugin = {
+  level1: {
+    value: function unit(_name, value, options) {
+      if (!WHOLE_PIXEL_VALUE.test(value)) {
+        return value;
+      }
+
+      return value.replace(WHOLE_PIXEL_VALUE, function(match, val) {
+        var newValue;
+        var intVal = parseInt(val);
+
+        if (intVal === 0) {
+          return match;
+        }
+
+        if (options.compatibility.properties.shorterLengthUnits
+          && options.compatibility.units.pt
+          && intVal * 3 % 4 === 0) {
+          newValue = intVal * 3 / 4 + 'pt';
+        }
+
+        if (options.compatibility.properties.shorterLengthUnits
+          && options.compatibility.units.pc
+          && intVal % 16 === 0) {
+          newValue = intVal / 16 + 'pc';
+        }
+
+        if (options.compatibility.properties.shorterLengthUnits
+          && options.compatibility.units.in
+          && intVal % 96 === 0) {
+          newValue = intVal / 96 + 'in';
+        }
+
+        if (newValue) {
+          newValue = match.substring(0, match.indexOf(val)) + newValue;
+        }
+
+        return newValue && newValue.length < match.length ? newValue : match;
+      });
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-prefix.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-prefix.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-prefix.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,23 @@
+var startsAsUrl = require('./starts-as-url');
+
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var URL_PREFIX_PATTERN = /^url\(/i;
+
+var plugin = {
+  level1: {
+    value: function urlPrefix(_name, value, options) {
+      if (!options.level[OptimizationLevel.One].normalizeUrls) {
+        return value;
+      }
+
+      if (!startsAsUrl(value)) {
+        return value;
+      }
+
+      return value.replace(URL_PREFIX_PATTERN, 'url(');
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-quotes.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-quotes.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-quotes.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,22 @@
+var QUOTED_URL_PATTERN = /^url\(['"].+['"]\)$/;
+var QUOTED_URL_WITH_WHITESPACE_PATTERN = /^url\(['"].*[*\s()'"].*['"]\)$/;
+var QUOTES_PATTERN = /["']/g;
+var URL_DATA_PATTERN = /^url\(['"]data:[^;]+;charset/;
+
+var plugin = {
+  level1: {
+    value: function urlQuotes(_name, value, options) {
+      if (options.compatibility.properties.urlQuotes) {
+        return value;
+      }
+
+      return QUOTED_URL_PATTERN.test(value)
+        && !QUOTED_URL_WITH_WHITESPACE_PATTERN.test(value)
+        && !URL_DATA_PATTERN.test(value)
+        ? value.replace(QUOTES_PATTERN, '')
+        : value;
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-whitespace.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-whitespace.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/url-whitespace.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,22 @@
+var startsAsUrl = require('./starts-as-url');
+
+var WHITESPACE_PATTERN = /\\?\n|\\?\r\n/g;
+var WHITESPACE_PREFIX_PATTERN = /(\()\s+/g;
+var WHITESPACE_SUFFIX_PATTERN = /\s+(\))/g;
+
+var plugin = {
+  level1: {
+    value: function urlWhitespace(_name, value) {
+      if (!startsAsUrl(value)) {
+        return value;
+      }
+
+      return value
+        .replace(WHITESPACE_PATTERN, '')
+        .replace(WHITESPACE_PREFIX_PATTERN, '$1')
+        .replace(WHITESPACE_SUFFIX_PATTERN, '$1');
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/whitespace.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/whitespace.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/whitespace.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,48 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var Marker = require('../../../tokenizer/marker');
+
+var CALC_DIVISION_WHITESPACE_PATTERN = /\) ?\/ ?/g;
+var COMMA_AND_SPACE_PATTERN = /, /g;
+var LINE_BREAK_PATTERN = /\r?\n/g;
+var MULTI_WHITESPACE_PATTERN = /\s+/g;
+var FUNCTION_CLOSING_BRACE_WHITESPACE_PATTERN = /\s+(;?\))/g;
+var FUNCTION_OPENING_BRACE_WHITESPACE_PATTERN = /(\(;?)\s+/g;
+var VARIABLE_NAME_PATTERN = /^--\S+$/;
+var VARIABLE_VALUE_PATTERN = /^var\(\s*--\S+\s*\)$/;
+
+var plugin = {
+  level1: {
+    value: function whitespace(name, value, options) {
+      if (!options.level[OptimizationLevel.One].removeWhitespace) {
+        return value;
+      }
+
+      if (VARIABLE_NAME_PATTERN.test(name) && !VARIABLE_VALUE_PATTERN.test(value)) {
+        return value;
+      }
+
+      if ((value.indexOf(' ') == -1 && value.indexOf('\n') == -1) || value.indexOf('expression') === 0) {
+        return value;
+      }
+
+      if (value.indexOf(Marker.SINGLE_QUOTE) > -1 || value.indexOf(Marker.DOUBLE_QUOTE) > -1) {
+        return value;
+      }
+
+      value = value.replace(LINE_BREAK_PATTERN, '');
+      value = value.replace(MULTI_WHITESPACE_PATTERN, ' ');
+
+      if (value.indexOf('calc') > -1) {
+        value = value.replace(CALC_DIVISION_WHITESPACE_PATTERN, ')/ ');
+      }
+
+      return value
+        .replace(FUNCTION_OPENING_BRACE_WHITESPACE_PATTERN, '$1')
+        .replace(FUNCTION_CLOSING_BRACE_WHITESPACE_PATTERN, '$1')
+        .replace(COMMA_AND_SPACE_PATTERN, ',');
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/zero.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/zero.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-1/value-optimizers/zero.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,49 @@
+var split = require('../../../utils/split');
+
+var ANY_FUNCTION_PATTERN = /^(-(?:moz|ms|o|webkit)-[a-z-]+|[a-z-]+)\((.+)\)$/;
+var SKIP_FUNCTION_PATTERN = /^(?:-moz-calc|-webkit-calc|calc|rgb|hsl|rgba|hsla|min|max|clamp|expression)\(/;
+var TOKEN_SEPARATOR_PATTERN = /([\s,/])/;
+
+function removeRecursively(value, options) {
+  var functionTokens;
+  var tokens;
+
+  if (SKIP_FUNCTION_PATTERN.test(value)) {
+    return value;
+  }
+
+  functionTokens = ANY_FUNCTION_PATTERN.exec(value);
+
+  if (!functionTokens) {
+    return removeZeros(value, options);
+  }
+
+  tokens = split(functionTokens[2], TOKEN_SEPARATOR_PATTERN)
+    .map(function(token) { return removeRecursively(token, options); });
+
+  return functionTokens[1] + '(' + tokens.join('') + ')';
+}
+
+function removeZeros(value, options) {
+  return value
+    .replace(options.unitsRegexp, '$10$2')
+    .replace(options.unitsRegexp, '$10$2');
+}
+
+var plugin = {
+  level1: {
+    value: function zero(name, value, options) {
+      if (!options.compatibility.properties.zeroUnits) {
+        return value;
+      }
+
+      if (value.indexOf('%') > 0 && (name == 'height' || name == 'max-height' || name == 'width' || name == 'max-width')) {
+        return value;
+      }
+
+      return removeRecursively(value, options);
+    }
+  }
+};
+
+module.exports = plugin;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/extract-properties.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/extract-properties.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/extract-properties.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,61 @@
+// This extractor is used in level 2 optimizations
+// IMPORTANT: Mind Token class and this code is not related!
+// Properties will be tokenized in one step, see #429
+
+var Token = require('../../tokenizer/token');
+var serializeRules = require('../../writer/one-time').rules;
+var serializeValue = require('../../writer/one-time').value;
+
+function extractProperties(token) {
+  var properties = [];
+  var inSpecificSelector;
+  var property;
+  var name;
+  var value;
+  var i, l;
+
+  if (token[0] == Token.RULE) {
+    inSpecificSelector = !/[.+>~]/.test(serializeRules(token[1]));
+
+    for (i = 0, l = token[2].length; i < l; i++) {
+      property = token[2][i];
+
+      if (property[0] != Token.PROPERTY) { continue; }
+
+      name = property[1][1];
+      if (name.length === 0) { continue; }
+
+      value = serializeValue(property, i);
+
+      properties.push([
+        name,
+        value,
+        findNameRoot(name),
+        token[2][i],
+        name + ':' + value,
+        token[1],
+        inSpecificSelector
+      ]);
+    }
+  } else if (token[0] == Token.NESTED_BLOCK) {
+    for (i = 0, l = token[2].length; i < l; i++) {
+      properties = properties.concat(extractProperties(token[2][i]));
+    }
+  }
+
+  return properties;
+}
+
+function findNameRoot(name) {
+  if (name == 'list-style') { return name; }
+  if (name.indexOf('-radius') > 0) { return 'border-radius'; }
+  if (name == 'border-collapse' || name == 'border-spacing' || name == 'border-image') { return name; }
+  if (name.indexOf('border-') === 0 && /^border-\w+-\w+$/.test(name)) { return name.match(/border-\w+/)[0]; }
+  if (name.indexOf('border-') === 0 && /^border-\w+$/.test(name)) { return 'border'; }
+  if (name.indexOf('text-') === 0) { return name; }
+  if (name == '-chrome-') { return name; }
+
+  return name.replace(/^-\w+-/, '').match(/([a-zA-Z]+)/)[0].toLowerCase();
+}
+
+module.exports = extractProperties;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/is-mergeable.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/is-mergeable.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/is-mergeable.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,273 @@
+var Marker = require('../../tokenizer/marker');
+var split = require('../../utils/split');
+
+var DEEP_SELECTOR_PATTERN = /\/deep\//;
+var DOUBLE_COLON_PATTERN = /^::/;
+var VENDOR_PREFIXED_PATTERN = /:(-moz-|-ms-|-o-|-webkit-)/;
+
+var NOT_PSEUDO = ':not';
+var PSEUDO_CLASSES_WITH_ARGUMENTS = [
+  ':dir',
+  ':lang',
+  ':not',
+  ':nth-child',
+  ':nth-last-child',
+  ':nth-last-of-type',
+  ':nth-of-type'
+];
+var RELATION_PATTERN = /[>+~]/;
+var UNMIXABLE_PSEUDO_CLASSES = [
+  ':after',
+  ':before',
+  ':first-letter',
+  ':first-line',
+  ':lang'
+];
+var UNMIXABLE_PSEUDO_ELEMENTS = [
+  '::after',
+  '::before',
+  '::first-letter',
+  '::first-line'
+];
+
+var Level = {
+  DOUBLE_QUOTE: 'double-quote',
+  SINGLE_QUOTE: 'single-quote',
+  ROOT: 'root'
+};
+
+function isMergeable(selector, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) {
+  var singleSelectors = split(selector, Marker.COMMA);
+  var singleSelector;
+  var i, l;
+
+  for (i = 0, l = singleSelectors.length; i < l; i++) {
+    singleSelector = singleSelectors[i];
+
+    if (singleSelector.length === 0
+        || isDeepSelector(singleSelector)
+        || isVendorPrefixed(singleSelector)
+        || (singleSelector.indexOf(Marker.COLON) > -1
+          && !areMergeable(
+            singleSelector,
+            extractPseudoFrom(singleSelector),
+            mergeablePseudoClasses,
+            mergeablePseudoElements,
+            multiplePseudoMerging
+          ))) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function isDeepSelector(selector) {
+  return DEEP_SELECTOR_PATTERN.test(selector);
+}
+
+function isVendorPrefixed(selector) {
+  return VENDOR_PREFIXED_PATTERN.test(selector);
+}
+
+function extractPseudoFrom(selector) {
+  var list = [];
+  var character;
+  var buffer = [];
+  var level = Level.ROOT;
+  var roundBracketLevel = 0;
+  var isQuoted;
+  var isEscaped;
+  var isPseudo = false;
+  var isRelation;
+  var wasColon = false;
+  var index;
+  var len;
+
+  for (index = 0, len = selector.length; index < len; index++) {
+    character = selector[index];
+
+    isRelation = !isEscaped && RELATION_PATTERN.test(character);
+    isQuoted = level == Level.DOUBLE_QUOTE || level == Level.SINGLE_QUOTE;
+
+    if (isEscaped) {
+      buffer.push(character);
+    } else if (character == Marker.DOUBLE_QUOTE && level == Level.ROOT) {
+      buffer.push(character);
+      level = Level.DOUBLE_QUOTE;
+    } else if (character == Marker.DOUBLE_QUOTE && level == Level.DOUBLE_QUOTE) {
+      buffer.push(character);
+      level = Level.ROOT;
+    } else if (character == Marker.SINGLE_QUOTE && level == Level.ROOT) {
+      buffer.push(character);
+      level = Level.SINGLE_QUOTE;
+    } else if (character == Marker.SINGLE_QUOTE && level == Level.SINGLE_QUOTE) {
+      buffer.push(character);
+      level = Level.ROOT;
+    } else if (isQuoted) {
+      buffer.push(character);
+    } else if (character == Marker.OPEN_ROUND_BRACKET) {
+      buffer.push(character);
+      roundBracketLevel++;
+    } else if (character == Marker.CLOSE_ROUND_BRACKET && roundBracketLevel == 1 && isPseudo) {
+      buffer.push(character);
+      list.push(buffer.join(''));
+      roundBracketLevel--;
+      buffer = [];
+      isPseudo = false;
+    } else if (character == Marker.CLOSE_ROUND_BRACKET) {
+      buffer.push(character);
+      roundBracketLevel--;
+    } else if (character == Marker.COLON && roundBracketLevel === 0 && isPseudo && !wasColon) {
+      list.push(buffer.join(''));
+      buffer = [];
+      buffer.push(character);
+    } else if (character == Marker.COLON && roundBracketLevel === 0 && !wasColon) {
+      buffer = [];
+      buffer.push(character);
+      isPseudo = true;
+    } else if (character == Marker.SPACE && roundBracketLevel === 0 && isPseudo) {
+      list.push(buffer.join(''));
+      buffer = [];
+      isPseudo = false;
+    } else if (isRelation && roundBracketLevel === 0 && isPseudo) {
+      list.push(buffer.join(''));
+      buffer = [];
+      isPseudo = false;
+    } else {
+      buffer.push(character);
+    }
+
+    isEscaped = character == Marker.BACK_SLASH;
+    wasColon = character == Marker.COLON;
+  }
+
+  if (buffer.length > 0 && isPseudo) {
+    list.push(buffer.join(''));
+  }
+
+  return list;
+}
+
+function areMergeable(selector, matches, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) {
+  return areAllowed(matches, mergeablePseudoClasses, mergeablePseudoElements)
+    && needArguments(matches)
+    && (matches.length < 2 || !someIncorrectlyChained(selector, matches))
+    && (matches.length < 2 || multiplePseudoMerging && allMixable(matches));
+}
+
+function areAllowed(matches, mergeablePseudoClasses, mergeablePseudoElements) {
+  var match;
+  var name;
+  var i, l;
+
+  for (i = 0, l = matches.length; i < l; i++) {
+    match = matches[i];
+    name = match.indexOf(Marker.OPEN_ROUND_BRACKET) > -1
+      ? match.substring(0, match.indexOf(Marker.OPEN_ROUND_BRACKET))
+      : match;
+
+    if (mergeablePseudoClasses.indexOf(name) === -1 && mergeablePseudoElements.indexOf(name) === -1) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function needArguments(matches) {
+  var match;
+  var name;
+  var bracketOpensAt;
+  var hasArguments;
+  var i, l;
+
+  for (i = 0, l = matches.length; i < l; i++) {
+    match = matches[i];
+
+    bracketOpensAt = match.indexOf(Marker.OPEN_ROUND_BRACKET);
+    hasArguments = bracketOpensAt > -1;
+    name = hasArguments
+      ? match.substring(0, bracketOpensAt)
+      : match;
+
+    if (hasArguments && PSEUDO_CLASSES_WITH_ARGUMENTS.indexOf(name) == -1) {
+      return false;
+    }
+
+    if (!hasArguments && PSEUDO_CLASSES_WITH_ARGUMENTS.indexOf(name) > -1) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function someIncorrectlyChained(selector, matches) {
+  var positionInSelector = 0;
+  var match;
+  var matchAt;
+  var nextMatch;
+  var nextMatchAt;
+  var name;
+  var nextName;
+  var areChained;
+  var i, l;
+
+  for (i = 0, l = matches.length; i < l; i++) {
+    match = matches[i];
+    nextMatch = matches[i + 1];
+
+    if (!nextMatch) {
+      break;
+    }
+
+    matchAt = selector.indexOf(match, positionInSelector);
+    nextMatchAt = selector.indexOf(match, matchAt + 1);
+    positionInSelector = nextMatchAt;
+    areChained = matchAt + match.length == nextMatchAt;
+
+    if (areChained) {
+      name = match.indexOf(Marker.OPEN_ROUND_BRACKET) > -1
+        ? match.substring(0, match.indexOf(Marker.OPEN_ROUND_BRACKET))
+        : match;
+      nextName = nextMatch.indexOf(Marker.OPEN_ROUND_BRACKET) > -1
+        ? nextMatch.substring(0, nextMatch.indexOf(Marker.OPEN_ROUND_BRACKET))
+        : nextMatch;
+
+      if (name != NOT_PSEUDO || nextName != NOT_PSEUDO) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
+function allMixable(matches) {
+  var unmixableMatches = 0;
+  var match;
+  var i, l;
+
+  for (i = 0, l = matches.length; i < l; i++) {
+    match = matches[i];
+
+    if (isPseudoElement(match)) {
+      unmixableMatches += UNMIXABLE_PSEUDO_ELEMENTS.indexOf(match) > -1 ? 1 : 0;
+    } else {
+      unmixableMatches += UNMIXABLE_PSEUDO_CLASSES.indexOf(match) > -1 ? 1 : 0;
+    }
+
+    if (unmixableMatches > 1) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function isPseudoElement(pseudo) {
+  return DOUBLE_COLON_PATTERN.test(pseudo);
+}
+
+module.exports = isMergeable;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-adjacent.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-adjacent.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-adjacent.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,55 @@
+var isMergeable = require('./is-mergeable');
+
+var optimizeProperties = require('./properties/optimize');
+
+var sortSelectors = require('../level-1/sort-selectors');
+var tidyRules = require('../level-1/tidy-rules');
+
+var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
+
+var serializeBody = require('../../writer/one-time').body;
+var serializeRules = require('../../writer/one-time').rules;
+
+var Token = require('../../tokenizer/token');
+
+function mergeAdjacent(tokens, context) {
+  var lastToken = [null, [], []];
+  var options = context.options;
+  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
+  var selectorsSortingMethod = options.level[OptimizationLevel.One].selectorsSortingMethod;
+  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
+  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
+  var mergeLimit = options.compatibility.selectors.mergeLimit;
+  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    if (token[0] != Token.RULE) {
+      lastToken = [null, [], []];
+      continue;
+    }
+
+    if (lastToken[0] == Token.RULE && serializeRules(token[1]) == serializeRules(lastToken[1])) {
+      Array.prototype.push.apply(lastToken[2], token[2]);
+      optimizeProperties(lastToken[2], true, true, context);
+      token[2] = [];
+    } else if (lastToken[0] == Token.RULE && serializeBody(token[2]) == serializeBody(lastToken[2])
+        && isMergeable(serializeRules(token[1]), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging)
+        && isMergeable(
+          serializeRules(lastToken[1]),
+          mergeablePseudoClasses,
+          mergeablePseudoElements,
+          multiplePseudoMerging
+        )
+        && lastToken[1].length < mergeLimit) {
+      lastToken[1] = tidyRules(lastToken[1].concat(token[1]), false, adjacentSpace, false, context.warnings);
+      lastToken[1] = lastToken.length > 1 ? sortSelectors(lastToken[1], selectorsSortingMethod) : lastToken[1];
+      token[2] = [];
+    } else {
+      lastToken = token;
+    }
+  }
+}
+
+module.exports = mergeAdjacent;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-media-queries.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-media-queries.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-media-queries.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,105 @@
+var canReorder = require('./reorderable').canReorder;
+var canReorderSingle = require('./reorderable').canReorderSingle;
+var extractProperties = require('./extract-properties');
+var rulesOverlap = require('./rules-overlap');
+
+var serializeRules = require('../../writer/one-time').rules;
+var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
+var Token = require('../../tokenizer/token');
+
+function mergeMediaQueries(tokens, context) {
+  var mergeSemantically = context.options.level[OptimizationLevel.Two].mergeSemantically;
+  var specificityCache = context.cache.specificity;
+  var candidates = {};
+  var reduced = [];
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+    if (token[0] != Token.NESTED_BLOCK) {
+      continue;
+    }
+
+    var key = serializeRules(token[1]);
+    var candidate = candidates[key];
+    if (!candidate) {
+      candidate = [];
+      candidates[key] = candidate;
+    }
+
+    candidate.push(i);
+  }
+
+  for (var name in candidates) {
+    var positions = candidates[name];
+
+    positionLoop:
+    for (var j = positions.length - 1; j > 0; j--) {
+      var positionOne = positions[j];
+      var tokenOne = tokens[positionOne];
+      var positionTwo = positions[j - 1];
+      var tokenTwo = tokens[positionTwo];
+
+      directionLoop:
+      for (var direction = 1; direction >= -1; direction -= 2) {
+        var topToBottom = direction == 1;
+        var from = topToBottom ? positionOne + 1 : positionTwo - 1;
+        var to = topToBottom ? positionTwo : positionOne;
+        var delta = topToBottom ? 1 : -1;
+        var source = topToBottom ? tokenOne : tokenTwo;
+        var target = topToBottom ? tokenTwo : tokenOne;
+        var movedProperties = extractProperties(source);
+
+        while (from != to) {
+          var traversedProperties = extractProperties(tokens[from]);
+          from += delta;
+
+          if (mergeSemantically
+            && allSameRulePropertiesCanBeReordered(movedProperties, traversedProperties, specificityCache)
+          ) {
+            continue;
+          }
+
+          if (!canReorder(movedProperties, traversedProperties, specificityCache)) { continue directionLoop; }
+        }
+
+        target[2] = topToBottom
+          ? source[2].concat(target[2])
+          : target[2].concat(source[2]);
+        source[2] = [];
+
+        reduced.push(target);
+        continue positionLoop;
+      }
+    }
+  }
+
+  return reduced;
+}
+
+function allSameRulePropertiesCanBeReordered(movedProperties, traversedProperties, specificityCache) {
+  var movedProperty;
+  var movedRule;
+  var traversedProperty;
+  var traversedRule;
+  var i, l;
+  var j, m;
+
+  for (i = 0, l = movedProperties.length; i < l; i++) {
+    movedProperty = movedProperties[i];
+    movedRule = movedProperty[5];
+
+    for (j = 0, m = traversedProperties.length; j < m; j++) {
+      traversedProperty = traversedProperties[j];
+      traversedRule = traversedProperty[5];
+
+      if (rulesOverlap(movedRule, traversedRule, true)
+        && !canReorderSingle(movedProperty, traversedProperty, specificityCache)) {
+        return false;
+      }
+    }
+  }
+
+  return true;
+}
+
+module.exports = mergeMediaQueries;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-body.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-body.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-body.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,88 @@
+var isMergeable = require('./is-mergeable');
+
+var sortSelectors = require('../level-1/sort-selectors');
+var tidyRules = require('../level-1/tidy-rules');
+
+var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
+
+var serializeBody = require('../../writer/one-time').body;
+var serializeRules = require('../../writer/one-time').rules;
+
+var Token = require('../../tokenizer/token');
+
+function unsafeSelector(value) {
+  return /\.|\*| :/.test(value);
+}
+
+function isBemElement(token) {
+  var asString = serializeRules(token[1]);
+  return asString.indexOf('__') > -1 || asString.indexOf('--') > -1;
+}
+
+function withoutModifier(selector) {
+  return selector.replace(/--[^ ,>+~:]+/g, '');
+}
+
+function removeAnyUnsafeElements(left, candidates) {
+  var leftSelector = withoutModifier(serializeRules(left[1]));
+
+  for (var body in candidates) {
+    var right = candidates[body];
+    var rightSelector = withoutModifier(serializeRules(right[1]));
+
+    if (rightSelector.indexOf(leftSelector) > -1 || leftSelector.indexOf(rightSelector) > -1) {
+      delete candidates[body];
+    }
+  }
+}
+
+function mergeNonAdjacentByBody(tokens, context) {
+  var options = context.options;
+  var mergeSemantically = options.level[OptimizationLevel.Two].mergeSemantically;
+  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
+  var selectorsSortingMethod = options.level[OptimizationLevel.One].selectorsSortingMethod;
+  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
+  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
+  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
+  var candidates = {};
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+    if (token[0] != Token.RULE) { continue; }
+
+    if (token[2].length > 0 && (!mergeSemantically && unsafeSelector(serializeRules(token[1])))) { candidates = {}; }
+
+    if (token[2].length > 0 && mergeSemantically && isBemElement(token)) { removeAnyUnsafeElements(token, candidates); }
+
+    var candidateBody = serializeBody(token[2]);
+    var oldToken = candidates[candidateBody];
+    if (oldToken
+        && isMergeable(
+          serializeRules(token[1]),
+          mergeablePseudoClasses,
+          mergeablePseudoElements,
+          multiplePseudoMerging
+        )
+        && isMergeable(
+          serializeRules(oldToken[1]),
+          mergeablePseudoClasses,
+          mergeablePseudoElements,
+          multiplePseudoMerging
+        )
+    ) {
+      if (token[2].length > 0) {
+        token[1] = tidyRules(oldToken[1].concat(token[1]), false, adjacentSpace, false, context.warnings);
+        token[1] = token[1].length > 1 ? sortSelectors(token[1], selectorsSortingMethod) : token[1];
+      } else {
+        token[1] = oldToken[1].concat(token[1]);
+      }
+
+      oldToken[2] = [];
+      candidates[candidateBody] = null;
+    }
+
+    candidates[serializeBody(token[2])] = token;
+  }
+}
+
+module.exports = mergeNonAdjacentByBody;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-selector.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-selector.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-selector.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,73 @@
+var canReorder = require('./reorderable').canReorder;
+var extractProperties = require('./extract-properties');
+
+var optimizeProperties = require('./properties/optimize');
+
+var serializeRules = require('../../writer/one-time').rules;
+
+var Token = require('../../tokenizer/token');
+
+function mergeNonAdjacentBySelector(tokens, context) {
+  var specificityCache = context.cache.specificity;
+  var allSelectors = {};
+  var repeatedSelectors = [];
+  var i;
+
+  for (i = tokens.length - 1; i >= 0; i--) {
+    if (tokens[i][0] != Token.RULE) { continue; }
+    if (tokens[i][2].length === 0) { continue; }
+
+    var selector = serializeRules(tokens[i][1]);
+    allSelectors[selector] = [i].concat(allSelectors[selector] || []);
+
+    if (allSelectors[selector].length == 2) { repeatedSelectors.push(selector); }
+  }
+
+  for (i = repeatedSelectors.length - 1; i >= 0; i--) {
+    var positions = allSelectors[repeatedSelectors[i]];
+
+    selectorIterator:
+    for (var j = positions.length - 1; j > 0; j--) {
+      var positionOne = positions[j - 1];
+      var tokenOne = tokens[positionOne];
+      var positionTwo = positions[j];
+      var tokenTwo = tokens[positionTwo];
+
+      directionIterator:
+      for (var direction = 1; direction >= -1; direction -= 2) {
+        var topToBottom = direction == 1;
+        var from = topToBottom ? positionOne + 1 : positionTwo - 1;
+        var to = topToBottom ? positionTwo : positionOne;
+        var delta = topToBottom ? 1 : -1;
+        var moved = topToBottom ? tokenOne : tokenTwo;
+        var target = topToBottom ? tokenTwo : tokenOne;
+        var movedProperties = extractProperties(moved);
+
+        while (from != to) {
+          var traversedProperties = extractProperties(tokens[from]);
+          from += delta;
+
+          // traversed then moved as we move selectors towards the start
+          var reorderable = topToBottom
+            ? canReorder(movedProperties, traversedProperties, specificityCache)
+            : canReorder(traversedProperties, movedProperties, specificityCache);
+
+          if (!reorderable && !topToBottom) { continue selectorIterator; }
+          if (!reorderable && topToBottom) { continue directionIterator; }
+        }
+
+        if (topToBottom) {
+          Array.prototype.push.apply(moved[2], target[2]);
+          target[2] = moved[2];
+        } else {
+          Array.prototype.push.apply(target[2], moved[2]);
+        }
+
+        optimizeProperties(target[2], true, true, context);
+        moved[2] = [];
+      }
+    }
+  }
+}
+
+module.exports = mergeNonAdjacentBySelector;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/optimize.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,139 @@
+var mergeAdjacent = require('./merge-adjacent');
+var mergeMediaQueries = require('./merge-media-queries');
+var mergeNonAdjacentByBody = require('./merge-non-adjacent-by-body');
+var mergeNonAdjacentBySelector = require('./merge-non-adjacent-by-selector');
+var reduceNonAdjacent = require('./reduce-non-adjacent');
+var removeDuplicateFontAtRules = require('./remove-duplicate-font-at-rules');
+var removeDuplicateMediaQueries = require('./remove-duplicate-media-queries');
+var removeDuplicates = require('./remove-duplicates');
+var removeUnusedAtRules = require('./remove-unused-at-rules');
+var restructure = require('./restructure');
+
+var optimizeProperties = require('./properties/optimize');
+
+var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
+
+var Token = require('../../tokenizer/token');
+
+function removeEmpty(tokens) {
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+    var isEmpty = false;
+
+    switch (token[0]) {
+    case Token.RULE:
+      isEmpty = token[1].length === 0 || token[2].length === 0;
+      break;
+    case Token.NESTED_BLOCK:
+      removeEmpty(token[2]);
+      isEmpty = token[2].length === 0;
+      break;
+    case Token.AT_RULE:
+      isEmpty = token[1].length === 0;
+      break;
+    case Token.AT_RULE_BLOCK:
+      isEmpty = token[2].length === 0;
+    }
+
+    if (isEmpty) {
+      tokens.splice(i, 1);
+      i--;
+      l--;
+    }
+  }
+}
+
+function recursivelyOptimizeBlocks(tokens, context) {
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    if (token[0] == Token.NESTED_BLOCK) {
+      var isKeyframes = /@(-moz-|-o-|-webkit-)?keyframes/.test(token[1][0][1]);
+      level2Optimize(token[2], context, !isKeyframes);
+    }
+  }
+}
+
+function recursivelyOptimizeProperties(tokens, context) {
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    switch (token[0]) {
+    case Token.RULE:
+      optimizeProperties(token[2], true, true, context);
+      break;
+    case Token.NESTED_BLOCK:
+      recursivelyOptimizeProperties(token[2], context);
+    }
+  }
+}
+
+function level2Optimize(tokens, context, withRestructuring) {
+  var levelOptions = context.options.level[OptimizationLevel.Two];
+  var level2Plugins = context.options.plugins.level2Block;
+  var reduced;
+  var i;
+
+  recursivelyOptimizeBlocks(tokens, context);
+  recursivelyOptimizeProperties(tokens, context);
+
+  if (levelOptions.removeDuplicateRules) {
+    removeDuplicates(tokens, context);
+  }
+
+  if (levelOptions.mergeAdjacentRules) {
+    mergeAdjacent(tokens, context);
+  }
+
+  if (levelOptions.reduceNonAdjacentRules) {
+    reduceNonAdjacent(tokens, context);
+  }
+
+  if (levelOptions.mergeNonAdjacentRules && levelOptions.mergeNonAdjacentRules != 'body') {
+    mergeNonAdjacentBySelector(tokens, context);
+  }
+
+  if (levelOptions.mergeNonAdjacentRules && levelOptions.mergeNonAdjacentRules != 'selector') {
+    mergeNonAdjacentByBody(tokens, context);
+  }
+
+  if (levelOptions.restructureRules && levelOptions.mergeAdjacentRules && withRestructuring) {
+    restructure(tokens, context);
+    mergeAdjacent(tokens, context);
+  }
+
+  if (levelOptions.restructureRules && !levelOptions.mergeAdjacentRules && withRestructuring) {
+    restructure(tokens, context);
+  }
+
+  if (levelOptions.removeDuplicateFontRules) {
+    removeDuplicateFontAtRules(tokens, context);
+  }
+
+  if (levelOptions.removeDuplicateMediaBlocks) {
+    removeDuplicateMediaQueries(tokens, context);
+  }
+
+  if (levelOptions.removeUnusedAtRules) {
+    removeUnusedAtRules(tokens, context);
+  }
+
+  if (levelOptions.mergeMedia) {
+    reduced = mergeMediaQueries(tokens, context);
+    for (i = reduced.length - 1; i >= 0; i--) {
+      level2Optimize(reduced[i][2], context, false);
+    }
+  }
+
+  for (i = 0; i < level2Plugins.length; i++) {
+    level2Plugins[i](tokens);
+  }
+
+  if (levelOptions.removeEmpty) {
+    removeEmpty(tokens);
+  }
+
+  return tokens;
+}
+
+module.exports = level2Optimize;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/every-values-pair.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/every-values-pair.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/every-values-pair.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,28 @@
+var Marker = require('../../../tokenizer/marker');
+
+function everyValuesPair(fn, left, right) {
+  var leftSize = left.value.length;
+  var rightSize = right.value.length;
+  var total = Math.max(leftSize, rightSize);
+  var lowerBound = Math.min(leftSize, rightSize) - 1;
+  var leftValue;
+  var rightValue;
+  var position;
+
+  for (position = 0; position < total; position++) {
+    leftValue = left.value[position] && left.value[position][1] || leftValue;
+    rightValue = right.value[position] && right.value[position][1] || rightValue;
+
+    if (leftValue == Marker.COMMA || rightValue == Marker.COMMA) {
+      continue;
+    }
+
+    if (!fn(leftValue, rightValue, position, position <= lowerBound)) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+module.exports = everyValuesPair;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/find-component-in.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/find-component-in.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/find-component-in.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,38 @@
+var configuration = require('../../configuration');
+
+function findComponentIn(shorthand, longhand) {
+  var comparator = nameComparator(longhand);
+
+  return findInDirectComponents(shorthand, comparator) || findInSubComponents(shorthand, comparator);
+}
+
+function nameComparator(to) {
+  return function(property) {
+    return to.name === property.name;
+  };
+}
+
+function findInDirectComponents(shorthand, comparator) {
+  return shorthand.components.filter(comparator)[0];
+}
+
+function findInSubComponents(shorthand, comparator) {
+  var shorthandComponent;
+  var longhandMatch;
+  var i, l;
+
+  if (!configuration[shorthand.name].shorthandComponents) {
+    return;
+  }
+
+  for (i = 0, l = shorthand.components.length; i < l; i++) {
+    shorthandComponent = shorthand.components[i];
+    longhandMatch = findInDirectComponents(shorthandComponent, comparator);
+
+    if (longhandMatch) {
+      return longhandMatch;
+    }
+  }
+}
+
+module.exports = findComponentIn;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-inherit.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-inherit.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-inherit.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,9 @@
+function hasInherit(property) {
+  for (var i = property.value.length - 1; i >= 0; i--) {
+    if (property.value[i][1] == 'inherit') { return true; }
+  }
+
+  return false;
+}
+
+module.exports = hasInherit;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-same-values.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-same-values.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-same-values.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,14 @@
+function hasSameValues(property) {
+  var firstValue = property.value[0][1];
+  var i, l;
+
+  for (i = 1, l = property.value.length; i < l; i++) {
+    if (property.value[i][1] != firstValue) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+module.exports = hasSameValues;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-unset.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-unset.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/has-unset.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,9 @@
+function hasUnset(property) {
+  for (var i = property.value.length - 1; i >= 0; i--) {
+    if (property.value[i][1] == 'unset') { return true; }
+  }
+
+  return false;
+}
+
+module.exports = hasUnset;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/is-component-of.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/is-component-of.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/is-component-of.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,22 @@
+var configuration = require('../../configuration');
+
+function isComponentOf(property1, property2, shallow) {
+  return isDirectComponentOf(property1, property2)
+    || !shallow && !!configuration[property1.name].shorthandComponents && isSubComponentOf(property1, property2);
+}
+
+function isDirectComponentOf(property1, property2) {
+  var descriptor = configuration[property1.name];
+
+  return 'components' in descriptor && descriptor.components.indexOf(property2.name) > -1;
+}
+
+function isSubComponentOf(property1, property2) {
+  return property1
+    .components
+    .some(function(component) {
+      return isDirectComponentOf(component, property2);
+    });
+}
+
+module.exports = isComponentOf;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/is-mergeable-shorthand.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/is-mergeable-shorthand.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/is-mergeable-shorthand.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,11 @@
+var Marker = require('../../../tokenizer/marker');
+
+function isMergeableShorthand(shorthand) {
+  if (shorthand.name != 'font') {
+    return true;
+  }
+
+  return shorthand.value[0][1].indexOf(Marker.INTERNAL) == -1;
+}
+
+module.exports = isMergeableShorthand;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/merge-into-shorthands.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/merge-into-shorthands.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/merge-into-shorthands.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,496 @@
+var everyValuesPair = require('./every-values-pair');
+var hasInherit = require('./has-inherit');
+var hasSameValues = require('./has-same-values');
+var populateComponents = require('./populate-components');
+
+var configuration = require('../../configuration');
+var deepClone = require('../../clone').deep;
+var restoreWithComponents = require('../restore-with-components');
+
+var restoreFromOptimizing = require('../../restore-from-optimizing');
+var wrapSingle = require('../../wrap-for-optimizing').single;
+
+var serializeBody = require('../../../writer/one-time').body;
+var Token = require('../../../tokenizer/token');
+
+function mergeIntoShorthands(properties, validator) {
+  var candidates = {};
+  var descriptor;
+  var componentOf;
+  var property;
+  var i, l;
+  var j, m;
+
+  // there is no shorthand property made up of less than 3 longhands
+  if (properties.length < 3) {
+    return;
+  }
+
+  for (i = 0, l = properties.length; i < l; i++) {
+    property = properties[i];
+    descriptor = configuration[property.name];
+
+    if (property.dynamic) {
+      continue;
+    }
+
+    if (property.unused) {
+      continue;
+    }
+
+    if (property.hack) {
+      continue;
+    }
+
+    if (property.block) {
+      continue;
+    }
+
+    if (descriptor && descriptor.singleTypeComponents && !hasSameValues(property)) {
+      continue;
+    }
+
+    invalidateOrCompact(properties, i, candidates, validator);
+
+    if (descriptor && descriptor.componentOf) {
+      for (j = 0, m = descriptor.componentOf.length; j < m; j++) {
+        componentOf = descriptor.componentOf[j];
+
+        candidates[componentOf] = candidates[componentOf] || {};
+        candidates[componentOf][property.name] = property;
+      }
+    }
+  }
+
+  invalidateOrCompact(properties, i, candidates, validator);
+}
+
+function invalidateOrCompact(properties, position, candidates, validator) {
+  var invalidatedBy = properties[position];
+  var shorthandName;
+  var shorthandDescriptor;
+  var candidateComponents;
+  var replacedCandidates = [];
+  var i;
+
+  for (shorthandName in candidates) {
+    if (undefined !== invalidatedBy && shorthandName == invalidatedBy.name) {
+      continue;
+    }
+
+    shorthandDescriptor = configuration[shorthandName];
+    candidateComponents = candidates[shorthandName];
+    if (invalidatedBy && invalidates(candidates, shorthandName, invalidatedBy)) {
+      delete candidates[shorthandName];
+      continue;
+    }
+
+    if (shorthandDescriptor.components.length > Object.keys(candidateComponents).length) {
+      continue;
+    }
+
+    if (mixedImportance(candidateComponents)) {
+      continue;
+    }
+
+    if (!overridable(candidateComponents, shorthandName, validator)) {
+      continue;
+    }
+
+    if (!mergeable(candidateComponents)) {
+      continue;
+    }
+
+    if (mixedInherit(candidateComponents)) {
+      replaceWithInheritBestFit(properties, candidateComponents, shorthandName, validator);
+    } else {
+      replaceWithShorthand(properties, candidateComponents, shorthandName, validator);
+    }
+
+    replacedCandidates.push(shorthandName);
+  }
+
+  for (i = replacedCandidates.length - 1; i >= 0; i--) {
+    delete candidates[replacedCandidates[i]];
+  }
+}
+
+function invalidates(candidates, shorthandName, invalidatedBy) {
+  var shorthandDescriptor = configuration[shorthandName];
+  var invalidatedByDescriptor = configuration[invalidatedBy.name];
+  var componentName;
+
+  if ('overridesShorthands' in shorthandDescriptor && shorthandDescriptor.overridesShorthands.indexOf(invalidatedBy.name) > -1) {
+    return true;
+  }
+
+  if (invalidatedByDescriptor && 'componentOf' in invalidatedByDescriptor) {
+    for (componentName in candidates[shorthandName]) {
+      if (invalidatedByDescriptor.componentOf.indexOf(componentName) > -1) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
+function mixedImportance(components) {
+  var important;
+  var componentName;
+
+  for (componentName in components) {
+    if (undefined !== important && components[componentName].important != important) {
+      return true;
+    }
+
+    important = components[componentName].important;
+  }
+
+  return false;
+}
+
+function overridable(components, shorthandName, validator) {
+  var descriptor = configuration[shorthandName];
+  var newValuePlaceholder = [
+    Token.PROPERTY,
+    [Token.PROPERTY_NAME, shorthandName],
+    [Token.PROPERTY_VALUE, descriptor.defaultValue]
+  ];
+  var newProperty = wrapSingle(newValuePlaceholder);
+  var component;
+  var mayOverride;
+  var i, l;
+
+  populateComponents([newProperty], validator, []);
+
+  for (i = 0, l = descriptor.components.length; i < l; i++) {
+    component = components[descriptor.components[i]];
+    mayOverride = configuration[component.name].canOverride || sameValue;
+
+    if (!everyValuesPair(mayOverride.bind(null, validator), newProperty.components[i], component)) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+function sameValue(_validator, value1, value2) {
+  return value1 === value2;
+}
+
+function mergeable(components) {
+  var lastCount = null;
+  var currentCount;
+  var componentName;
+  var component;
+  var descriptor;
+  var values;
+
+  for (componentName in components) {
+    component = components[componentName];
+    descriptor = configuration[componentName];
+
+    if (!('restore' in descriptor)) {
+      continue;
+    }
+
+    restoreFromOptimizing([component.all[component.position]], restoreWithComponents);
+    values = descriptor.restore(component, configuration);
+
+    currentCount = values.length;
+
+    if (lastCount !== null && currentCount !== lastCount) {
+      return false;
+    }
+
+    lastCount = currentCount;
+  }
+
+  return true;
+}
+
+function mixedInherit(components) {
+  var componentName;
+  var lastValue = null;
+  var currentValue;
+
+  for (componentName in components) {
+    currentValue = hasInherit(components[componentName]);
+
+    if (lastValue !== null && lastValue !== currentValue) {
+      return true;
+    }
+
+    lastValue = currentValue;
+  }
+
+  return false;
+}
+
+function replaceWithInheritBestFit(properties, candidateComponents, shorthandName, validator) {
+  var viaLonghands = buildSequenceWithInheritLonghands(candidateComponents, shorthandName, validator);
+  var viaShorthand = buildSequenceWithInheritShorthand(candidateComponents, shorthandName, validator);
+  var longhandTokensSequence = viaLonghands[0];
+  var shorthandTokensSequence = viaShorthand[0];
+  var isLonghandsShorter = serializeBody(longhandTokensSequence).length < serializeBody(shorthandTokensSequence).length;
+  var newTokensSequence = isLonghandsShorter ? longhandTokensSequence : shorthandTokensSequence;
+  var newProperty = isLonghandsShorter ? viaLonghands[1] : viaShorthand[1];
+  var newComponents = isLonghandsShorter ? viaLonghands[2] : viaShorthand[2];
+  var lastComponent = candidateComponents[Object.keys(candidateComponents).pop()];
+  var all = lastComponent.all;
+  var insertAt = lastComponent.position;
+  var componentName;
+  var oldComponent;
+  var newComponent;
+  var newToken;
+
+  newProperty.position = insertAt;
+  newProperty.shorthand = true;
+  newProperty.important = lastComponent.important;
+  newProperty.multiplex = false;
+  newProperty.dirty = true;
+  newProperty.all = all;
+  newProperty.all[insertAt] = newTokensSequence[0];
+
+  properties.splice(insertAt, 1, newProperty);
+
+  for (componentName in candidateComponents) {
+    oldComponent = candidateComponents[componentName];
+    oldComponent.unused = true;
+
+    newProperty.multiplex = newProperty.multiplex || oldComponent.multiplex;
+
+    if (oldComponent.name in newComponents) {
+      newComponent = newComponents[oldComponent.name];
+      newToken = findTokenIn(newTokensSequence, componentName);
+
+      newComponent.position = all.length;
+      newComponent.all = all;
+      newComponent.all.push(newToken);
+
+      properties.push(newComponent);
+    }
+  }
+}
+
+function buildSequenceWithInheritLonghands(components, shorthandName, validator) {
+  var tokensSequence = [];
+  var inheritComponents = {};
+  var nonInheritComponents = {};
+  var descriptor = configuration[shorthandName];
+  var shorthandToken = [
+    Token.PROPERTY,
+    [Token.PROPERTY_NAME, shorthandName],
+    [Token.PROPERTY_VALUE, descriptor.defaultValue]
+  ];
+  var newProperty = wrapSingle(shorthandToken);
+  var component;
+  var longhandToken;
+  var newComponent;
+  var nameMetadata;
+  var i, l;
+
+  populateComponents([newProperty], validator, []);
+
+  for (i = 0, l = descriptor.components.length; i < l; i++) {
+    component = components[descriptor.components[i]];
+
+    if (hasInherit(component)) {
+      longhandToken = component.all[component.position].slice(0, 2);
+      Array.prototype.push.apply(longhandToken, component.value);
+      tokensSequence.push(longhandToken);
+
+      newComponent = deepClone(component);
+      newComponent.value = inferComponentValue(components, newComponent.name);
+
+      newProperty.components[i] = newComponent;
+      inheritComponents[component.name] = deepClone(component);
+    } else {
+      newComponent = deepClone(component);
+      newComponent.all = component.all;
+      newProperty.components[i] = newComponent;
+
+      nonInheritComponents[component.name] = component;
+    }
+  }
+
+  newProperty.important = components[Object.keys(components).pop()].important;
+
+  nameMetadata = joinMetadata(nonInheritComponents, 1);
+  shorthandToken[1].push(nameMetadata);
+
+  restoreFromOptimizing([newProperty], restoreWithComponents);
+
+  shorthandToken = shorthandToken.slice(0, 2);
+  Array.prototype.push.apply(shorthandToken, newProperty.value);
+
+  tokensSequence.unshift(shorthandToken);
+
+  return [tokensSequence, newProperty, inheritComponents];
+}
+
+function inferComponentValue(components, propertyName) {
+  var descriptor = configuration[propertyName];
+
+  if ('oppositeTo' in descriptor) {
+    return components[descriptor.oppositeTo].value;
+  }
+  return [[Token.PROPERTY_VALUE, descriptor.defaultValue]];
+}
+
+function joinMetadata(components, at) {
+  var metadata = [];
+  var component;
+  var originalValue;
+  var componentMetadata;
+  var componentName;
+
+  for (componentName in components) {
+    component = components[componentName];
+    originalValue = component.all[component.position];
+    componentMetadata = originalValue[at][originalValue[at].length - 1];
+
+    Array.prototype.push.apply(metadata, componentMetadata);
+  }
+
+  return metadata.sort(metadataSorter);
+}
+
+function metadataSorter(metadata1, metadata2) {
+  var line1 = metadata1[0];
+  var line2 = metadata2[0];
+  var column1 = metadata1[1];
+  var column2 = metadata2[1];
+
+  if (line1 < line2) {
+    return -1;
+  } if (line1 === line2) {
+    return column1 < column2 ? -1 : 1;
+  }
+  return 1;
+}
+
+function buildSequenceWithInheritShorthand(components, shorthandName, validator) {
+  var tokensSequence = [];
+  var inheritComponents = {};
+  var nonInheritComponents = {};
+  var descriptor = configuration[shorthandName];
+  var shorthandToken = [
+    Token.PROPERTY,
+    [Token.PROPERTY_NAME, shorthandName],
+    [Token.PROPERTY_VALUE, 'inherit']
+  ];
+  var newProperty = wrapSingle(shorthandToken);
+  var component;
+  var longhandToken;
+  var nameMetadata;
+  var valueMetadata;
+  var i, l;
+
+  populateComponents([newProperty], validator, []);
+
+  for (i = 0, l = descriptor.components.length; i < l; i++) {
+    component = components[descriptor.components[i]];
+
+    if (hasInherit(component)) {
+      inheritComponents[component.name] = component;
+    } else {
+      longhandToken = component.all[component.position].slice(0, 2);
+      Array.prototype.push.apply(longhandToken, component.value);
+      tokensSequence.push(longhandToken);
+
+      nonInheritComponents[component.name] = deepClone(component);
+    }
+  }
+
+  nameMetadata = joinMetadata(inheritComponents, 1);
+  shorthandToken[1].push(nameMetadata);
+
+  valueMetadata = joinMetadata(inheritComponents, 2);
+  shorthandToken[2].push(valueMetadata);
+
+  tokensSequence.unshift(shorthandToken);
+
+  return [tokensSequence, newProperty, nonInheritComponents];
+}
+
+function findTokenIn(tokens, componentName) {
+  var i, l;
+
+  for (i = 0, l = tokens.length; i < l; i++) {
+    if (tokens[i][1][1] == componentName) {
+      return tokens[i];
+    }
+  }
+}
+
+function replaceWithShorthand(properties, candidateComponents, shorthandName, validator) {
+  var descriptor = configuration[shorthandName];
+  var nameMetadata;
+  var valueMetadata;
+  var newValuePlaceholder = [
+    Token.PROPERTY,
+    [Token.PROPERTY_NAME, shorthandName],
+    [Token.PROPERTY_VALUE, descriptor.defaultValue]
+  ];
+  var all;
+  var insertAt = inferInsertAtFrom(properties, candidateComponents, shorthandName);
+
+  var newProperty = wrapSingle(newValuePlaceholder);
+  newProperty.shorthand = true;
+  newProperty.dirty = true;
+  newProperty.multiplex = false;
+
+  populateComponents([newProperty], validator, []);
+
+  for (var i = 0, l = descriptor.components.length; i < l; i++) {
+    var component = candidateComponents[descriptor.components[i]];
+
+    newProperty.components[i] = deepClone(component);
+    newProperty.important = component.important;
+    newProperty.multiplex = newProperty.multiplex || component.multiplex;
+
+    all = component.all;
+  }
+
+  for (var componentName in candidateComponents) {
+    candidateComponents[componentName].unused = true;
+  }
+
+  nameMetadata = joinMetadata(candidateComponents, 1);
+  newValuePlaceholder[1].push(nameMetadata);
+
+  valueMetadata = joinMetadata(candidateComponents, 2);
+  newValuePlaceholder[2].push(valueMetadata);
+
+  newProperty.position = insertAt;
+  newProperty.all = all;
+  newProperty.all[insertAt] = newValuePlaceholder;
+
+  properties.splice(insertAt, 1, newProperty);
+}
+
+function inferInsertAtFrom(properties, candidateComponents, shorthandName) {
+  var candidateComponentNames = Object.keys(candidateComponents);
+  var firstCandidatePosition = candidateComponents[candidateComponentNames[0]].position;
+  var lastCandidatePosition = candidateComponents[candidateComponentNames[candidateComponentNames.length - 1]].position;
+
+  if (shorthandName == 'border' && traversesVia(properties.slice(firstCandidatePosition, lastCandidatePosition), 'border-image')) {
+    return firstCandidatePosition;
+  }
+  return lastCandidatePosition;
+}
+
+function traversesVia(properties, propertyName) {
+  for (var i = properties.length - 1; i >= 0; i--) {
+    if (properties[i].name == propertyName) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+module.exports = mergeIntoShorthands;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/optimize.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/optimize.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,40 @@
+var mergeIntoShorthands = require('./merge-into-shorthands');
+var overrideProperties = require('./override-properties');
+var populateComponents = require('./populate-components');
+
+var restoreWithComponents = require('../restore-with-components');
+
+var wrapForOptimizing = require('../../wrap-for-optimizing').all;
+var removeUnused = require('../../remove-unused');
+var restoreFromOptimizing = require('../../restore-from-optimizing');
+
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+function optimizeProperties(properties, withOverriding, withMerging, context) {
+  var levelOptions = context.options.level[OptimizationLevel.Two];
+  var _properties = wrapForOptimizing(properties, levelOptions.skipProperties);
+  var _property;
+  var i, l;
+
+  populateComponents(_properties, context.validator, context.warnings);
+
+  for (i = 0, l = _properties.length; i < l; i++) {
+    _property = _properties[i];
+    if (_property.block) {
+      optimizeProperties(_property.value[0][1], withOverriding, withMerging, context);
+    }
+  }
+
+  if (withMerging && levelOptions.mergeIntoShorthands) {
+    mergeIntoShorthands(_properties, context.validator);
+  }
+
+  if (withOverriding && levelOptions.overrideProperties) {
+    overrideProperties(_properties, withMerging, context.options.compatibility, context.validator);
+  }
+
+  restoreFromOptimizing(_properties, restoreWithComponents);
+  removeUnused(_properties);
+}
+
+module.exports = optimizeProperties;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/override-properties.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/override-properties.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/override-properties.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,461 @@
+var hasInherit = require('./has-inherit');
+var hasUnset = require('./has-unset');
+var everyValuesPair = require('./every-values-pair');
+var findComponentIn = require('./find-component-in');
+var isComponentOf = require('./is-component-of');
+var isMergeableShorthand = require('./is-mergeable-shorthand');
+var overridesNonComponentShorthand = require('./overrides-non-component-shorthand');
+var sameVendorPrefixesIn = require('./../../vendor-prefixes').same;
+
+var configuration = require('../../configuration');
+var deepClone = require('../../clone').deep;
+var restoreWithComponents = require('../restore-with-components');
+var shallowClone = require('../../clone').shallow;
+
+var restoreFromOptimizing = require('../../restore-from-optimizing');
+
+var Token = require('../../../tokenizer/token');
+var Marker = require('../../../tokenizer/marker');
+
+var serializeProperty = require('../../../writer/one-time').property;
+
+function sameValue(_validator, value1, value2) {
+  return value1 === value2;
+}
+
+function wouldBreakCompatibility(property, validator) {
+  for (var i = 0; i < property.components.length; i++) {
+    var component = property.components[i];
+    var descriptor = configuration[component.name];
+    var canOverride = descriptor && descriptor.canOverride || sameValue;
+
+    var _component = shallowClone(component);
+    _component.value = [[Token.PROPERTY_VALUE, descriptor.defaultValue]];
+
+    if (!everyValuesPair(canOverride.bind(null, validator), _component, component)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function overrideIntoMultiplex(property, by) {
+  by.unused = true;
+
+  turnIntoMultiplex(by, multiplexSize(property));
+  property.value = by.value;
+}
+
+function overrideByMultiplex(property, by) {
+  by.unused = true;
+  property.multiplex = true;
+  property.value = by.value;
+}
+
+function overrideSimple(property, by) {
+  by.unused = true;
+  property.value = by.value;
+}
+
+function override(property, by) {
+  if (by.multiplex) {
+    overrideByMultiplex(property, by);
+  } else if (property.multiplex) {
+    overrideIntoMultiplex(property, by);
+  } else {
+    overrideSimple(property, by);
+  }
+}
+
+function overrideShorthand(property, by) {
+  by.unused = true;
+
+  for (var i = 0, l = property.components.length; i < l; i++) {
+    override(property.components[i], by.components[i]);
+  }
+}
+
+function turnIntoMultiplex(property, size) {
+  property.multiplex = true;
+
+  if (configuration[property.name].shorthand) {
+    turnShorthandValueIntoMultiplex(property, size);
+  } else {
+    turnLonghandValueIntoMultiplex(property, size);
+  }
+}
+
+function turnShorthandValueIntoMultiplex(property, size) {
+  var component;
+  var i, l;
+
+  for (i = 0, l = property.components.length; i < l; i++) {
+    component = property.components[i];
+
+    if (!component.multiplex) {
+      turnLonghandValueIntoMultiplex(component, size);
+    }
+  }
+}
+
+function turnLonghandValueIntoMultiplex(property, size) {
+  var descriptor = configuration[property.name];
+  var withRealValue = descriptor.intoMultiplexMode == 'real';
+  var withValue = descriptor.intoMultiplexMode == 'real'
+    ? property.value.slice(0)
+    : (descriptor.intoMultiplexMode == 'placeholder' ? descriptor.placeholderValue : descriptor.defaultValue);
+  var i = multiplexSize(property);
+  var j;
+  var m = withValue.length;
+
+  for (; i < size; i++) {
+    property.value.push([Token.PROPERTY_VALUE, Marker.COMMA]);
+
+    if (Array.isArray(withValue)) {
+      for (j = 0; j < m; j++) {
+        property.value.push(withRealValue ? withValue[j] : [Token.PROPERTY_VALUE, withValue[j]]);
+      }
+    } else {
+      property.value.push(withRealValue ? withValue : [Token.PROPERTY_VALUE, withValue]);
+    }
+  }
+}
+
+function multiplexSize(component) {
+  var size = 0;
+
+  for (var i = 0, l = component.value.length; i < l; i++) {
+    if (component.value[i][1] == Marker.COMMA) { size++; }
+  }
+
+  return size + 1;
+}
+
+function lengthOf(property) {
+  var fakeAsArray = [
+    Token.PROPERTY,
+    [Token.PROPERTY_NAME, property.name]
+  ].concat(property.value);
+  return serializeProperty([fakeAsArray], 0).length;
+}
+
+function moreSameShorthands(properties, startAt, name) {
+  // Since we run the main loop in `compactOverrides` backwards, at this point some
+  // properties may not be marked as unused.
+  // We should consider reverting the order if possible
+  var count = 0;
+
+  for (var i = startAt; i >= 0; i--) {
+    if (properties[i].name == name && !properties[i].unused) { count++; }
+    if (count > 1) { break; }
+  }
+
+  return count > 1;
+}
+
+function overridingFunction(shorthand, validator) {
+  for (var i = 0, l = shorthand.components.length; i < l; i++) {
+    if (!anyValue(validator.isUrl, shorthand.components[i])
+      && anyValue(validator.isFunction, shorthand.components[i])) { return true; }
+  }
+
+  return false;
+}
+
+function anyValue(fn, property) {
+  for (var i = 0, l = property.value.length; i < l; i++) {
+    if (property.value[i][1] == Marker.COMMA) { continue; }
+
+    if (fn(property.value[i][1])) { return true; }
+  }
+
+  return false;
+}
+
+function wouldResultInLongerValue(left, right) {
+  if (!left.multiplex && !right.multiplex || left.multiplex && right.multiplex) { return false; }
+
+  var multiplex = left.multiplex ? left : right;
+  var simple = left.multiplex ? right : left;
+  var component;
+
+  var multiplexClone = deepClone(multiplex);
+  restoreFromOptimizing([multiplexClone], restoreWithComponents);
+
+  var simpleClone = deepClone(simple);
+  restoreFromOptimizing([simpleClone], restoreWithComponents);
+
+  var lengthBefore = lengthOf(multiplexClone) + 1 + lengthOf(simpleClone);
+
+  if (left.multiplex) {
+    component = findComponentIn(multiplexClone, simpleClone);
+    overrideIntoMultiplex(component, simpleClone);
+  } else {
+    component = findComponentIn(simpleClone, multiplexClone);
+    turnIntoMultiplex(simpleClone, multiplexSize(multiplexClone));
+    overrideByMultiplex(component, multiplexClone);
+  }
+
+  restoreFromOptimizing([simpleClone], restoreWithComponents);
+
+  var lengthAfter = lengthOf(simpleClone);
+
+  return lengthBefore <= lengthAfter;
+}
+
+function isCompactable(property) {
+  return property.name in configuration;
+}
+
+function noneOverrideHack(left, right) {
+  return !left.multiplex
+    && (left.name == 'background' || left.name == 'background-image')
+    && right.multiplex
+    && (right.name == 'background' || right.name == 'background-image')
+    && anyLayerIsNone(right.value);
+}
+
+function anyLayerIsNone(values) {
+  var layers = intoLayers(values);
+
+  for (var i = 0, l = layers.length; i < l; i++) {
+    if (layers[i].length == 1 && layers[i][0][1] == 'none') { return true; }
+  }
+
+  return false;
+}
+
+function intoLayers(values) {
+  var layers = [];
+
+  for (var i = 0, layer = [], l = values.length; i < l; i++) {
+    var value = values[i];
+    if (value[1] == Marker.COMMA) {
+      layers.push(layer);
+      layer = [];
+    } else {
+      layer.push(value);
+    }
+  }
+
+  layers.push(layer);
+  return layers;
+}
+
+function overrideProperties(properties, withMerging, compatibility, validator) {
+  var mayOverride, right, left, component;
+  var overriddenComponents;
+  var overriddenComponent;
+  var overridingComponent;
+  var overridable;
+  var i, j, k;
+
+  propertyLoop:
+  for (i = properties.length - 1; i >= 0; i--) {
+    right = properties[i];
+
+    if (!isCompactable(right)) { continue; }
+
+    if (right.block) { continue; }
+
+    mayOverride = configuration[right.name].canOverride || sameValue;
+
+    traverseLoop:
+    for (j = i - 1; j >= 0; j--) {
+      left = properties[j];
+
+      if (!isCompactable(left)) { continue; }
+
+      if (left.block) { continue; }
+
+      if (left.dynamic || right.dynamic) { continue; }
+
+      if (left.unused || right.unused) { continue; }
+
+      if (left.hack && !right.hack && !right.important || !left.hack && !left.important && right.hack) { continue; }
+
+      if (left.important == right.important && left.hack[0] != right.hack[0]) { continue; }
+
+      if (left.important == right.important
+        && (left.hack[0] != right.hack[0] || (left.hack[1] && left.hack[1] != right.hack[1]))) { continue; }
+
+      if (hasInherit(right)) { continue; }
+
+      if (noneOverrideHack(left, right)) { continue; }
+
+      if (right.shorthand && isComponentOf(right, left)) {
+        // maybe `left` can be overridden by `right` which is a shorthand?
+        if (!right.important && left.important) { continue; }
+
+        if (!sameVendorPrefixesIn([left], right.components)) { continue; }
+
+        if (!anyValue(validator.isFunction, left) && overridingFunction(right, validator)) { continue; }
+
+        if (!isMergeableShorthand(right)) {
+          left.unused = true;
+          continue;
+        }
+
+        component = findComponentIn(right, left);
+        mayOverride = configuration[left.name].canOverride || sameValue;
+        if (everyValuesPair(mayOverride.bind(null, validator), left, component)) {
+          left.unused = true;
+        }
+      } else if (right.shorthand && overridesNonComponentShorthand(right, left)) {
+        // `right` is a shorthand while `left` can be overriden by it, think `border` and `border-top`
+        if (!right.important && left.important) {
+          continue;
+        }
+
+        if (!sameVendorPrefixesIn([left], right.components)) {
+          continue;
+        }
+
+        if (!anyValue(validator.isFunction, left) && overridingFunction(right, validator)) {
+          continue;
+        }
+
+        overriddenComponents = left.shorthand
+          ? left.components
+          : [left];
+
+        for (k = overriddenComponents.length - 1; k >= 0; k--) {
+          overriddenComponent = overriddenComponents[k];
+          overridingComponent = findComponentIn(right, overriddenComponent);
+          mayOverride = configuration[overriddenComponent.name].canOverride || sameValue;
+
+          if (!everyValuesPair(mayOverride.bind(null, validator), left, overridingComponent)) {
+            continue traverseLoop;
+          }
+        }
+
+        left.unused = true;
+      } else if (withMerging && left.shorthand && !right.shorthand && isComponentOf(left, right, true)) {
+        // maybe `right` can be pulled into `left` which is a shorthand?
+        if (right.important && !left.important) { continue; }
+
+        if (!right.important && left.important) {
+          right.unused = true;
+          continue;
+        }
+
+        // Pending more clever algorithm in #527
+        if (moreSameShorthands(properties, i - 1, left.name)) { continue; }
+
+        if (overridingFunction(left, validator)) { continue; }
+
+        if (!isMergeableShorthand(left)) { continue; }
+
+        if (hasUnset(left) || hasUnset(right)) { continue; }
+
+        component = findComponentIn(left, right);
+        if (everyValuesPair(mayOverride.bind(null, validator), component, right)) {
+          var disabledBackgroundMerging = !compatibility.properties.backgroundClipMerging && component.name.indexOf('background-clip') > -1
+            || !compatibility.properties.backgroundOriginMerging && component.name.indexOf('background-origin') > -1
+            || !compatibility.properties.backgroundSizeMerging && component.name.indexOf('background-size') > -1;
+          var nonMergeableValue = configuration[right.name].nonMergeableValue === right.value[0][1];
+
+          if (disabledBackgroundMerging || nonMergeableValue) { continue; }
+
+          if (!compatibility.properties.merging && wouldBreakCompatibility(left, validator)) { continue; }
+
+          if (component.value[0][1] != right.value[0][1] && (hasInherit(left) || hasInherit(right))) { continue; }
+
+          if (wouldResultInLongerValue(left, right)) { continue; }
+
+          if (!left.multiplex && right.multiplex) { turnIntoMultiplex(left, multiplexSize(right)); }
+
+          override(component, right);
+          left.dirty = true;
+        }
+      } else if (withMerging && left.shorthand && right.shorthand && left.name == right.name) {
+        // merge if all components can be merged
+
+        if (!left.multiplex && right.multiplex) { continue; }
+
+        if (!right.important && left.important) {
+          right.unused = true;
+          continue propertyLoop;
+        }
+
+        if (right.important && !left.important) {
+          left.unused = true;
+          continue;
+        }
+
+        if (!isMergeableShorthand(right)) {
+          left.unused = true;
+          continue;
+        }
+
+        for (k = left.components.length - 1; k >= 0; k--) {
+          var leftComponent = left.components[k];
+          var rightComponent = right.components[k];
+
+          mayOverride = configuration[leftComponent.name].canOverride || sameValue;
+          if (!everyValuesPair(mayOverride.bind(null, validator), leftComponent, rightComponent)) {
+            continue propertyLoop;
+          }
+        }
+
+        overrideShorthand(left, right);
+        left.dirty = true;
+      } else if (withMerging && left.shorthand && right.shorthand && isComponentOf(left, right)) {
+        // border is a shorthand but any of its components is a shorthand too
+
+        if (!left.important && right.important) { continue; }
+
+        component = findComponentIn(left, right);
+        mayOverride = configuration[right.name].canOverride || sameValue;
+        if (!everyValuesPair(mayOverride.bind(null, validator), component, right)) { continue; }
+
+        if (left.important && !right.important) {
+          right.unused = true;
+          continue;
+        }
+
+        var rightRestored = configuration[right.name].restore(right, configuration);
+        if (rightRestored.length > 1) { continue; }
+
+        component = findComponentIn(left, right);
+        override(component, right);
+        right.dirty = true;
+      } else if (left.name == right.name) {
+        // two non-shorthands should be merged based on understandability
+        overridable = true;
+
+        if (right.shorthand) {
+          for (k = right.components.length - 1; k >= 0 && overridable; k--) {
+            overriddenComponent = left.components[k];
+            overridingComponent = right.components[k];
+            mayOverride = configuration[overridingComponent.name].canOverride || sameValue;
+
+            overridable = everyValuesPair(mayOverride.bind(null, validator), overriddenComponent, overridingComponent);
+          }
+        } else {
+          mayOverride = configuration[right.name].canOverride || sameValue;
+          overridable = everyValuesPair(mayOverride.bind(null, validator), left, right);
+        }
+
+        if (left.important && !right.important && overridable) {
+          right.unused = true;
+          continue;
+        }
+
+        if (!left.important && right.important && overridable) {
+          left.unused = true;
+          continue;
+        }
+
+        if (!overridable) {
+          continue;
+        }
+
+        left.unused = true;
+      }
+    }
+  }
+}
+
+module.exports = overrideProperties;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/overrides-non-component-shorthand.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/overrides-non-component-shorthand.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/overrides-non-component-shorthand.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,9 @@
+var configuration = require('../../configuration');
+
+function overridesNonComponentShorthand(property1, property2) {
+  return property1.name in configuration
+    && 'overridesShorthands' in configuration[property1.name]
+    && configuration[property1.name].overridesShorthands.indexOf(property2.name) > -1;
+}
+
+module.exports = overridesNonComponentShorthand;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/populate-components.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/populate-components.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/properties/populate-components.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,61 @@
+var configuration = require('../../configuration');
+var InvalidPropertyError = require('../../invalid-property-error');
+
+function populateComponents(properties, validator, warnings) {
+  var component;
+  var j, m;
+
+  for (var i = properties.length - 1; i >= 0; i--) {
+    var property = properties[i];
+    var descriptor = configuration[property.name];
+
+    if (!property.dynamic && descriptor && descriptor.shorthand) {
+      if (onlyValueIsVariable(property, validator) || moreThanOneValueIsVariable(property, validator)) {
+        property.optimizable = false;
+        continue;
+      }
+
+      property.shorthand = true;
+      property.dirty = true;
+
+      try {
+        property.components = descriptor.breakUp(property, configuration, validator);
+
+        if (descriptor.shorthandComponents) {
+          for (j = 0, m = property.components.length; j < m; j++) {
+            component = property.components[j];
+            component.components = configuration[component.name].breakUp(component, configuration, validator);
+          }
+        }
+      } catch (e) {
+        if (e instanceof InvalidPropertyError) {
+          property.components = []; // this will set property.unused to true below
+          warnings.push(e.message);
+        } else {
+          throw e;
+        }
+      }
+
+      if (property.components.length > 0) {
+        property.multiplex = property.components[0].multiplex;
+      } else {
+        property.unused = true;
+      }
+    }
+  }
+}
+
+function onlyValueIsVariable(property, validator) {
+  return property.value.length == 1 && validator.isVariable(property.value[0][1]);
+}
+
+function moreThanOneValueIsVariable(property, validator) {
+  return property.value.length > 1
+    && property.value.filter(
+      function(value) {
+        return validator.isVariable(value[1]);
+      }
+    ).length > 1;
+}
+
+module.exports = populateComponents;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/reduce-non-adjacent.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/reduce-non-adjacent.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/reduce-non-adjacent.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,174 @@
+var isMergeable = require('./is-mergeable');
+
+var optimizeProperties = require('./properties/optimize');
+
+var cloneArray = require('../../utils/clone-array');
+
+var Token = require('../../tokenizer/token');
+
+var serializeBody = require('../../writer/one-time').body;
+var serializeRules = require('../../writer/one-time').rules;
+
+function reduceNonAdjacent(tokens, context) {
+  var options = context.options;
+  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
+  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
+  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
+  var candidates = {};
+  var repeated = [];
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+
+    if (token[0] != Token.RULE) {
+      continue;
+    } else if (token[2].length === 0) {
+      continue;
+    }
+
+    var selectorAsString = serializeRules(token[1]);
+    var isComplexAndNotSpecial = token[1].length > 1
+      && isMergeable(selectorAsString, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging);
+    var wrappedSelectors = wrappedSelectorsFrom(token[1]);
+    var selectors = isComplexAndNotSpecial
+      ? [selectorAsString].concat(wrappedSelectors)
+      : [selectorAsString];
+
+    for (var j = 0, m = selectors.length; j < m; j++) {
+      var selector = selectors[j];
+
+      if (!candidates[selector]) { candidates[selector] = []; } else { repeated.push(selector); }
+
+      candidates[selector].push({
+        where: i,
+        list: wrappedSelectors,
+        isPartial: isComplexAndNotSpecial && j > 0,
+        isComplex: isComplexAndNotSpecial && j === 0
+      });
+    }
+  }
+
+  reduceSimpleNonAdjacentCases(tokens, repeated, candidates, options, context);
+  reduceComplexNonAdjacentCases(tokens, candidates, options, context);
+}
+
+function wrappedSelectorsFrom(list) {
+  var wrapped = [];
+
+  for (var i = 0; i < list.length; i++) {
+    wrapped.push([list[i][1]]);
+  }
+
+  return wrapped;
+}
+
+function reduceSimpleNonAdjacentCases(tokens, repeated, candidates, options, context) {
+  function filterOut(idx, bodies) {
+    return data[idx].isPartial && bodies.length === 0;
+  }
+
+  function reduceBody(token, newBody, processedCount, tokenIdx) {
+    if (!data[processedCount - tokenIdx - 1].isPartial) { token[2] = newBody; }
+  }
+
+  for (var i = 0, l = repeated.length; i < l; i++) {
+    var selector = repeated[i];
+    var data = candidates[selector];
+
+    reduceSelector(tokens, data, {
+      filterOut: filterOut,
+      callback: reduceBody
+    }, options, context);
+  }
+}
+
+function reduceComplexNonAdjacentCases(tokens, candidates, options, context) {
+  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
+  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
+  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
+  var localContext = {};
+
+  function filterOut(idx) {
+    return localContext.data[idx].where < localContext.intoPosition;
+  }
+
+  function collectReducedBodies(token, newBody, processedCount, tokenIdx) {
+    if (tokenIdx === 0) { localContext.reducedBodies.push(newBody); }
+  }
+
+  allSelectors:
+  for (var complexSelector in candidates) {
+    var into = candidates[complexSelector];
+    if (!into[0].isComplex) { continue; }
+
+    var intoPosition = into[into.length - 1].where;
+    var intoToken = tokens[intoPosition];
+    var reducedBodies = [];
+
+    var selectors = isMergeable(complexSelector, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging)
+      ? into[0].list
+      : [complexSelector];
+
+    localContext.intoPosition = intoPosition;
+    localContext.reducedBodies = reducedBodies;
+
+    for (var j = 0, m = selectors.length; j < m; j++) {
+      var selector = selectors[j];
+      var data = candidates[selector];
+
+      if (data.length < 2) { continue allSelectors; }
+
+      localContext.data = data;
+
+      reduceSelector(tokens, data, {
+        filterOut: filterOut,
+        callback: collectReducedBodies
+      }, options, context);
+
+      if (serializeBody(reducedBodies[reducedBodies.length - 1]) != serializeBody(reducedBodies[0])) {
+        continue allSelectors;
+      }
+    }
+
+    intoToken[2] = reducedBodies[0];
+  }
+}
+
+function reduceSelector(tokens, data, context, options, outerContext) {
+  var bodies = [];
+  var bodiesAsList = [];
+  var processedTokens = [];
+
+  for (var j = data.length - 1; j >= 0; j--) {
+    if (context.filterOut(j, bodies)) { continue; }
+
+    var where = data[j].where;
+    var token = tokens[where];
+    var clonedBody = cloneArray(token[2]);
+
+    bodies = bodies.concat(clonedBody);
+    bodiesAsList.push(clonedBody);
+    processedTokens.push(where);
+  }
+
+  optimizeProperties(bodies, true, false, outerContext);
+
+  var processedCount = processedTokens.length;
+  var propertyIdx = bodies.length - 1;
+  var tokenIdx = processedCount - 1;
+
+  while (tokenIdx >= 0) {
+    if ((tokenIdx === 0
+      || (bodies[propertyIdx] && bodiesAsList[tokenIdx].indexOf(bodies[propertyIdx]) > -1)) && propertyIdx > -1) {
+      propertyIdx--;
+      continue;
+    }
+
+    var newBody = bodies.splice(propertyIdx + 1);
+    context.callback(tokens[processedTokens[tokenIdx]], newBody, processedCount, tokenIdx);
+
+    tokenIdx--;
+  }
+}
+
+module.exports = reduceNonAdjacent;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-font-at-rules.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-font-at-rules.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-font-at-rules.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,30 @@
+var Token = require('../../tokenizer/token');
+
+var serializeAll = require('../../writer/one-time').all;
+
+var FONT_FACE_SCOPE = '@font-face';
+
+function removeDuplicateFontAtRules(tokens) {
+  var fontAtRules = [];
+  var token;
+  var key;
+  var i, l;
+
+  for (i = 0, l = tokens.length; i < l; i++) {
+    token = tokens[i];
+
+    if (token[0] != Token.AT_RULE_BLOCK && token[1][0][1] != FONT_FACE_SCOPE) {
+      continue;
+    }
+
+    key = serializeAll([token]);
+
+    if (fontAtRules.indexOf(key) > -1) {
+      token[2] = [];
+    } else {
+      fontAtRules.push(key);
+    }
+  }
+}
+
+module.exports = removeDuplicateFontAtRules;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-media-queries.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-media-queries.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-media-queries.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,30 @@
+var Token = require('../../tokenizer/token');
+
+var serializeAll = require('../../writer/one-time').all;
+var serializeRules = require('../../writer/one-time').rules;
+
+function removeDuplicateMediaQueries(tokens) {
+  var candidates = {};
+  var candidate;
+  var token;
+  var key;
+  var i, l;
+
+  for (i = 0, l = tokens.length; i < l; i++) {
+    token = tokens[i];
+    if (token[0] != Token.NESTED_BLOCK) {
+      continue;
+    }
+
+    key = serializeRules(token[1]) + '%' + serializeAll(token[2]);
+    candidate = candidates[key];
+
+    if (candidate) {
+      candidate[2] = [];
+    }
+
+    candidates[key] = token;
+  }
+}
+
+module.exports = removeDuplicateMediaQueries;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicates.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicates.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-duplicates.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,36 @@
+var Token = require('../../tokenizer/token');
+
+var serializeBody = require('../../writer/one-time').body;
+var serializeRules = require('../../writer/one-time').rules;
+
+function removeDuplicates(tokens) {
+  var matched = {};
+  var moreThanOnce = [];
+  var id, token;
+  var body, bodies;
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    token = tokens[i];
+    if (token[0] != Token.RULE) { continue; }
+
+    id = serializeRules(token[1]);
+
+    if (matched[id] && matched[id].length == 1) { moreThanOnce.push(id); } else { matched[id] = matched[id] || []; }
+
+    matched[id].push(i);
+  }
+
+  for (i = 0, l = moreThanOnce.length; i < l; i++) {
+    id = moreThanOnce[i];
+    bodies = [];
+
+    for (var j = matched[id].length - 1; j >= 0; j--) {
+      token = tokens[matched[id][j]];
+      body = serializeBody(token[2]);
+
+      if (bodies.indexOf(body) > -1) { token[2] = []; } else { bodies.push(body); }
+    }
+  }
+}
+
+module.exports = removeDuplicates;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-unused-at-rules.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-unused-at-rules.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/remove-unused-at-rules.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,249 @@
+var populateComponents = require('./properties/populate-components');
+
+var wrapForOptimizing = require('../wrap-for-optimizing').single;
+var restoreFromOptimizing = require('../restore-from-optimizing');
+
+var Token = require('../../tokenizer/token');
+
+var animationNameRegex = /^(-moz-|-o-|-webkit-)?animation-name$/;
+var animationRegex = /^(-moz-|-o-|-webkit-)?animation$/;
+var keyframeRegex = /^@(-moz-|-o-|-webkit-)?keyframes /;
+var importantRegex = /\s{0,31}!important$/;
+var optionalMatchingQuotesRegex = /^(['"]?)(.*)\1$/;
+
+function normalize(value) {
+  return value
+    .replace(optionalMatchingQuotesRegex, '$2')
+    .replace(importantRegex, '');
+}
+
+function removeUnusedAtRules(tokens, context) {
+  removeUnusedAtRule(tokens, matchCounterStyle, markCounterStylesAsUsed, context);
+  removeUnusedAtRule(tokens, matchFontFace, markFontFacesAsUsed, context);
+  removeUnusedAtRule(tokens, matchKeyframe, markKeyframesAsUsed, context);
+  removeUnusedAtRule(tokens, matchNamespace, markNamespacesAsUsed, context);
+}
+
+function removeUnusedAtRule(tokens, matchCallback, markCallback, context) {
+  var atRules = {};
+  var atRule;
+  var atRuleTokens;
+  var atRuleToken;
+  var zeroAt;
+  var i, l;
+
+  for (i = 0, l = tokens.length; i < l; i++) {
+    matchCallback(tokens[i], atRules);
+  }
+
+  if (Object.keys(atRules).length === 0) {
+    return;
+  }
+
+  markUsedAtRules(tokens, markCallback, atRules, context);
+
+  for (atRule in atRules) {
+    atRuleTokens = atRules[atRule];
+
+    for (i = 0, l = atRuleTokens.length; i < l; i++) {
+      atRuleToken = atRuleTokens[i];
+      zeroAt = atRuleToken[0] == Token.AT_RULE ? 1 : 2;
+      atRuleToken[zeroAt] = [];
+    }
+  }
+}
+
+function markUsedAtRules(tokens, markCallback, atRules, context) {
+  var boundMarkCallback = markCallback(atRules);
+  var i, l;
+
+  for (i = 0, l = tokens.length; i < l; i++) {
+    switch (tokens[i][0]) {
+    case Token.RULE:
+      boundMarkCallback(tokens[i], context);
+      break;
+    case Token.NESTED_BLOCK:
+      markUsedAtRules(tokens[i][2], markCallback, atRules, context);
+    }
+  }
+}
+
+function matchCounterStyle(token, atRules) {
+  var match;
+
+  if (token[0] == Token.AT_RULE_BLOCK && token[1][0][1].indexOf('@counter-style') === 0) {
+    match = token[1][0][1].split(' ')[1];
+    atRules[match] = atRules[match] || [];
+    atRules[match].push(token);
+  }
+}
+
+function markCounterStylesAsUsed(atRules) {
+  return function(token, context) {
+    var property;
+    var wrappedProperty;
+    var i, l;
+
+    for (i = 0, l = token[2].length; i < l; i++) {
+      property = token[2][i];
+
+      if (property[1][1] == 'list-style') {
+        wrappedProperty = wrapForOptimizing(property);
+        populateComponents([wrappedProperty], context.validator, context.warnings);
+
+        if (wrappedProperty.components[0].value[0][1] in atRules) {
+          delete atRules[property[2][1]];
+        }
+
+        restoreFromOptimizing([wrappedProperty]);
+      }
+
+      if (property[1][1] == 'list-style-type' && property[2][1] in atRules) {
+        delete atRules[property[2][1]];
+      }
+    }
+  };
+}
+
+function matchFontFace(token, atRules) {
+  var property;
+  var match;
+  var i, l;
+
+  if (token[0] == Token.AT_RULE_BLOCK && token[1][0][1] == '@font-face') {
+    for (i = 0, l = token[2].length; i < l; i++) {
+      property = token[2][i];
+
+      if (property[1][1] == 'font-family') {
+        match = normalize(property[2][1].toLowerCase());
+        atRules[match] = atRules[match] || [];
+        atRules[match].push(token);
+        break;
+      }
+    }
+  }
+}
+
+function markFontFacesAsUsed(atRules) {
+  return function(token, context) {
+    var property;
+    var wrappedProperty;
+    var component;
+    var normalizedMatch;
+    var i, l;
+    var j, m;
+
+    for (i = 0, l = token[2].length; i < l; i++) {
+      property = token[2][i];
+
+      if (property[1][1] == 'font') {
+        wrappedProperty = wrapForOptimizing(property);
+        populateComponents([wrappedProperty], context.validator, context.warnings);
+        component = wrappedProperty.components[6];
+
+        for (j = 0, m = component.value.length; j < m; j++) {
+          normalizedMatch = normalize(component.value[j][1].toLowerCase());
+
+          if (normalizedMatch in atRules) {
+            delete atRules[normalizedMatch];
+          }
+        }
+
+        restoreFromOptimizing([wrappedProperty]);
+      }
+
+      if (property[1][1] == 'font-family') {
+        for (j = 2, m = property.length; j < m; j++) {
+          normalizedMatch = normalize(property[j][1].toLowerCase());
+
+          if (normalizedMatch in atRules) {
+            delete atRules[normalizedMatch];
+          }
+        }
+      }
+    }
+  };
+}
+
+function matchKeyframe(token, atRules) {
+  var match;
+
+  if (token[0] == Token.NESTED_BLOCK && keyframeRegex.test(token[1][0][1])) {
+    match = token[1][0][1].split(' ')[1];
+    atRules[match] = atRules[match] || [];
+    atRules[match].push(token);
+  }
+}
+
+function markKeyframesAsUsed(atRules) {
+  return function(token, context) {
+    var property;
+    var wrappedProperty;
+    var component;
+    var i, l;
+    var j, m;
+
+    for (i = 0, l = token[2].length; i < l; i++) {
+      property = token[2][i];
+
+      if (animationRegex.test(property[1][1])) {
+        wrappedProperty = wrapForOptimizing(property);
+        populateComponents([wrappedProperty], context.validator, context.warnings);
+        component = wrappedProperty.components[7];
+
+        for (j = 0, m = component.value.length; j < m; j++) {
+          if (component.value[j][1] in atRules) {
+            delete atRules[component.value[j][1]];
+          }
+        }
+
+        restoreFromOptimizing([wrappedProperty]);
+      }
+
+      if (animationNameRegex.test(property[1][1])) {
+        for (j = 2, m = property.length; j < m; j++) {
+          if (property[j][1] in atRules) {
+            delete atRules[property[j][1]];
+          }
+        }
+      }
+    }
+  };
+}
+
+function matchNamespace(token, atRules) {
+  var match;
+
+  if (token[0] == Token.AT_RULE && token[1].indexOf('@namespace') === 0) {
+    match = token[1].split(' ')[1];
+    atRules[match] = atRules[match] || [];
+    atRules[match].push(token);
+  }
+}
+
+function markNamespacesAsUsed(atRules) {
+  var namespaceRegex = new RegExp(Object.keys(atRules).join('\\||') + '\\|', 'g');
+
+  return function(token) {
+    var match;
+    var scope;
+    var normalizedMatch;
+    var i, l;
+    var j, m;
+
+    for (i = 0, l = token[1].length; i < l; i++) {
+      scope = token[1][i];
+      match = scope[1].match(namespaceRegex);
+
+      for (j = 0, m = match.length; j < m; j++) {
+        normalizedMatch = match[j].substring(0, match[j].length - 1);
+
+        if (normalizedMatch in atRules) {
+          delete atRules[normalizedMatch];
+        }
+      }
+    }
+  };
+}
+
+module.exports = removeUnusedAtRules;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/reorderable.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/reorderable.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/reorderable.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,93 @@
+// TODO: it'd be great to merge it with the other canReorder functionality
+
+var rulesOverlap = require('./rules-overlap');
+var specificitiesOverlap = require('./specificities-overlap');
+
+var FLEX_PROPERTIES = /align-items|box-align|box-pack|flex|justify/;
+var BORDER_PROPERTIES = /^border-(top|right|bottom|left|color|style|width|radius)/;
+
+function canReorder(left, right, cache) {
+  for (var i = right.length - 1; i >= 0; i--) {
+    for (var j = left.length - 1; j >= 0; j--) {
+      if (!canReorderSingle(left[j], right[i], cache)) { return false; }
+    }
+  }
+
+  return true;
+}
+
+function canReorderSingle(left, right, cache) {
+  var leftName = left[0];
+  var leftValue = left[1];
+  var leftNameRoot = left[2];
+  var leftSelector = left[5];
+  var leftInSpecificSelector = left[6];
+  var rightName = right[0];
+  var rightValue = right[1];
+  var rightNameRoot = right[2];
+  var rightSelector = right[5];
+  var rightInSpecificSelector = right[6];
+
+  if (leftName == 'font' && rightName == 'line-height' || rightName == 'font' && leftName == 'line-height') { return false; }
+  if (FLEX_PROPERTIES.test(leftName) && FLEX_PROPERTIES.test(rightName)) { return false; }
+  if (leftNameRoot == rightNameRoot
+    && unprefixed(leftName) == unprefixed(rightName)
+    && (vendorPrefixed(leftName) ^ vendorPrefixed(rightName))) { return false; }
+  if (leftNameRoot == 'border' && BORDER_PROPERTIES.test(rightNameRoot) && (leftName == 'border' || leftName == rightNameRoot || (leftValue != rightValue && sameBorderComponent(leftName, rightName)))) { return false; }
+  if (rightNameRoot == 'border' && BORDER_PROPERTIES.test(leftNameRoot) && (rightName == 'border' || rightName == leftNameRoot || (leftValue != rightValue && sameBorderComponent(leftName, rightName)))) { return false; }
+  if (leftNameRoot == 'border' && rightNameRoot == 'border' && leftName != rightName && (isSideBorder(leftName) && isStyleBorder(rightName) || isStyleBorder(leftName) && isSideBorder(rightName))) { return false; }
+  if (leftNameRoot != rightNameRoot) { return true; }
+  if (leftName == rightName
+    && leftNameRoot == rightNameRoot
+    && (leftValue == rightValue || withDifferentVendorPrefix(leftValue, rightValue))) { return true; }
+  if (leftName != rightName
+    && leftNameRoot == rightNameRoot
+    && leftName != leftNameRoot
+    && rightName != rightNameRoot) { return true; }
+  if (leftName != rightName
+    && leftNameRoot == rightNameRoot
+    && leftValue == rightValue) { return true; }
+  if (rightInSpecificSelector
+    && leftInSpecificSelector
+    && !inheritable(leftNameRoot)
+    && !inheritable(rightNameRoot)
+    && !rulesOverlap(rightSelector, leftSelector, false)) { return true; }
+  if (!specificitiesOverlap(leftSelector, rightSelector, cache)) { return true; }
+
+  return false;
+}
+
+function vendorPrefixed(name) {
+  return /^-(?:moz|webkit|ms|o)-/.test(name);
+}
+
+function unprefixed(name) {
+  return name.replace(/^-(?:moz|webkit|ms|o)-/, '');
+}
+
+function sameBorderComponent(name1, name2) {
+  return name1.split('-').pop() == name2.split('-').pop();
+}
+
+function isSideBorder(name) {
+  return name == 'border-top' || name == 'border-right' || name == 'border-bottom' || name == 'border-left';
+}
+
+function isStyleBorder(name) {
+  return name == 'border-color' || name == 'border-style' || name == 'border-width';
+}
+
+function withDifferentVendorPrefix(value1, value2) {
+  return vendorPrefixed(value1) && vendorPrefixed(value2) && value1.split('-')[1] != value2.split('-')[2];
+}
+
+function inheritable(name) {
+  // According to http://www.w3.org/TR/CSS21/propidx.html
+  // Others will be catched by other, preceeding rules
+  return name == 'font' || name == 'line-height' || name == 'list-style';
+}
+
+module.exports = {
+  canReorder: canReorder,
+  canReorderSingle: canReorderSingle
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/restore-with-components.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/restore-with-components.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/restore-with-components.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,12 @@
+var configuration = require('../configuration');
+
+function restoreWithComponents(property) {
+  var descriptor = configuration[property.name];
+
+  if (descriptor && descriptor.shorthand) {
+    return descriptor.restore(property, configuration);
+  }
+  return property.value;
+}
+
+module.exports = restoreWithComponents;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/restructure.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/restructure.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/restructure.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,392 @@
+var canReorderSingle = require('./reorderable').canReorderSingle;
+var extractProperties = require('./extract-properties');
+var isMergeable = require('./is-mergeable');
+var tidyRuleDuplicates = require('./tidy-rule-duplicates');
+
+var Token = require('../../tokenizer/token');
+
+var cloneArray = require('../../utils/clone-array');
+
+var serializeBody = require('../../writer/one-time').body;
+var serializeRules = require('../../writer/one-time').rules;
+
+function naturalSorter(a, b) {
+  return a > b ? 1 : -1;
+}
+
+function cloneAndMergeSelectors(propertyA, propertyB) {
+  var cloned = cloneArray(propertyA);
+  cloned[5] = cloned[5].concat(propertyB[5]);
+
+  return cloned;
+}
+
+function restructure(tokens, context) {
+  var options = context.options;
+  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
+  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
+  var mergeLimit = options.compatibility.selectors.mergeLimit;
+  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
+  var specificityCache = context.cache.specificity;
+  var movableTokens = {};
+  var movedProperties = [];
+  var multiPropertyMoveCache = {};
+  var movedToBeDropped = [];
+  var maxCombinationsLevel = 2;
+  var ID_JOIN_CHARACTER = '%';
+
+  function sendToMultiPropertyMoveCache(position, movedProperty, allFits) {
+    for (var i = allFits.length - 1; i >= 0; i--) {
+      var fit = allFits[i][0];
+      var id = addToCache(movedProperty, fit);
+
+      if (multiPropertyMoveCache[id].length > 1 && processMultiPropertyMove(position, multiPropertyMoveCache[id])) {
+        removeAllMatchingFromCache(id);
+        break;
+      }
+    }
+  }
+
+  function addToCache(movedProperty, fit) {
+    var id = cacheId(fit);
+    multiPropertyMoveCache[id] = multiPropertyMoveCache[id] || [];
+    multiPropertyMoveCache[id].push([movedProperty, fit]);
+    return id;
+  }
+
+  function removeAllMatchingFromCache(matchId) {
+    var matchSelectors = matchId.split(ID_JOIN_CHARACTER);
+    var forRemoval = [];
+    var i;
+
+    for (var id in multiPropertyMoveCache) {
+      var selectors = id.split(ID_JOIN_CHARACTER);
+      for (i = selectors.length - 1; i >= 0; i--) {
+        if (matchSelectors.indexOf(selectors[i]) > -1) {
+          forRemoval.push(id);
+          break;
+        }
+      }
+    }
+
+    for (i = forRemoval.length - 1; i >= 0; i--) {
+      delete multiPropertyMoveCache[forRemoval[i]];
+    }
+  }
+
+  function cacheId(cachedTokens) {
+    var id = [];
+    for (var i = 0, l = cachedTokens.length; i < l; i++) {
+      id.push(serializeRules(cachedTokens[i][1]));
+    }
+    return id.join(ID_JOIN_CHARACTER);
+  }
+
+  function tokensToMerge(sourceTokens) {
+    var uniqueTokensWithBody = [];
+    var mergeableTokens = [];
+
+    for (var i = sourceTokens.length - 1; i >= 0; i--) {
+      if (!isMergeable(
+        serializeRules(sourceTokens[i][1]),
+        mergeablePseudoClasses,
+        mergeablePseudoElements,
+        multiplePseudoMerging
+      )) {
+        continue;
+      }
+
+      mergeableTokens.unshift(sourceTokens[i]);
+      if (sourceTokens[i][2].length > 0
+        && uniqueTokensWithBody.indexOf(sourceTokens[i]) == -1) {
+        uniqueTokensWithBody.push(sourceTokens[i]);
+      }
+    }
+
+    return uniqueTokensWithBody.length > 1
+      ? mergeableTokens
+      : [];
+  }
+
+  function shortenIfPossible(position, movedProperty) {
+    var name = movedProperty[0];
+    var value = movedProperty[1];
+    var key = movedProperty[4];
+    var valueSize = name.length + value.length + 1;
+    var allSelectors = [];
+    var qualifiedTokens = [];
+
+    var mergeableTokens = tokensToMerge(movableTokens[key]);
+    if (mergeableTokens.length < 2) { return; }
+
+    var allFits = findAllFits(mergeableTokens, valueSize, 1);
+    var bestFit = allFits[0];
+    if (bestFit[1] > 0) { return sendToMultiPropertyMoveCache(position, movedProperty, allFits); }
+
+    for (var i = bestFit[0].length - 1; i >= 0; i--) {
+      allSelectors = bestFit[0][i][1].concat(allSelectors);
+      qualifiedTokens.unshift(bestFit[0][i]);
+    }
+
+    allSelectors = tidyRuleDuplicates(allSelectors);
+    dropAsNewTokenAt(position, [movedProperty], allSelectors, qualifiedTokens);
+  }
+
+  function fitSorter(fit1, fit2) {
+    return fit1[1] > fit2[1] ? 1 : (fit1[1] == fit2[1] ? 0 : -1);
+  }
+
+  function findAllFits(mergeableTokens, propertySize, propertiesCount) {
+    var combinations = allCombinations(mergeableTokens, propertySize, propertiesCount, maxCombinationsLevel - 1);
+    return combinations.sort(fitSorter);
+  }
+
+  function allCombinations(tokensVariant, propertySize, propertiesCount, level) {
+    var differenceVariants = [[tokensVariant, sizeDifference(tokensVariant, propertySize, propertiesCount)]];
+    if (tokensVariant.length > 2 && level > 0) {
+      for (var i = tokensVariant.length - 1; i >= 0; i--) {
+        var subVariant = Array.prototype.slice.call(tokensVariant, 0);
+        subVariant.splice(i, 1);
+        differenceVariants = differenceVariants.concat(
+          allCombinations(subVariant, propertySize, propertiesCount, level - 1)
+        );
+      }
+    }
+
+    return differenceVariants;
+  }
+
+  function sizeDifference(tokensVariant, propertySize, propertiesCount) {
+    var allSelectorsSize = 0;
+    for (var i = tokensVariant.length - 1; i >= 0; i--) {
+      allSelectorsSize += tokensVariant[i][2].length > propertiesCount
+        ? serializeRules(tokensVariant[i][1]).length
+        : -1;
+    }
+    return allSelectorsSize - (tokensVariant.length - 1) * propertySize + 1;
+  }
+
+  function dropAsNewTokenAt(position, properties, allSelectors, mergeableTokens) {
+    var i, j, k, m;
+    var allProperties = [];
+
+    for (i = mergeableTokens.length - 1; i >= 0; i--) {
+      var mergeableToken = mergeableTokens[i];
+
+      for (j = mergeableToken[2].length - 1; j >= 0; j--) {
+        var mergeableProperty = mergeableToken[2][j];
+
+        for (k = 0, m = properties.length; k < m; k++) {
+          var property = properties[k];
+
+          var mergeablePropertyName = mergeableProperty[1][1];
+          var propertyName = property[0];
+          var propertyBody = property[4];
+          if (mergeablePropertyName == propertyName && serializeBody([mergeableProperty]) == propertyBody) {
+            mergeableToken[2].splice(j, 1);
+            break;
+          }
+        }
+      }
+    }
+
+    for (i = properties.length - 1; i >= 0; i--) {
+      allProperties.unshift(properties[i][3]);
+    }
+
+    var newToken = [Token.RULE, allSelectors, allProperties];
+    tokens.splice(position, 0, newToken);
+  }
+
+  function dropPropertiesAt(position, movedProperty) {
+    var key = movedProperty[4];
+    var toMove = movableTokens[key];
+
+    if (toMove && toMove.length > 1) {
+      if (!shortenMultiMovesIfPossible(position, movedProperty)) { shortenIfPossible(position, movedProperty); }
+    }
+  }
+
+  function shortenMultiMovesIfPossible(position, movedProperty) {
+    var candidates = [];
+    var propertiesAndMergableTokens = [];
+    var key = movedProperty[4];
+    var j, k;
+
+    var mergeableTokens = tokensToMerge(movableTokens[key]);
+    if (mergeableTokens.length < 2) { return; }
+
+    movableLoop:
+    for (var value in movableTokens) {
+      var tokensList = movableTokens[value];
+
+      for (j = mergeableTokens.length - 1; j >= 0; j--) {
+        if (tokensList.indexOf(mergeableTokens[j]) == -1) { continue movableLoop; }
+      }
+
+      candidates.push(value);
+    }
+
+    if (candidates.length < 2) { return false; }
+
+    for (j = candidates.length - 1; j >= 0; j--) {
+      for (k = movedProperties.length - 1; k >= 0; k--) {
+        if (movedProperties[k][4] == candidates[j]) {
+          propertiesAndMergableTokens.unshift([movedProperties[k], mergeableTokens]);
+          break;
+        }
+      }
+    }
+
+    return processMultiPropertyMove(position, propertiesAndMergableTokens);
+  }
+
+  function processMultiPropertyMove(position, propertiesAndMergableTokens) {
+    var valueSize = 0;
+    var properties = [];
+    var property;
+
+    for (var i = propertiesAndMergableTokens.length - 1; i >= 0; i--) {
+      property = propertiesAndMergableTokens[i][0];
+      var fullValue = property[4];
+      valueSize += fullValue.length + (i > 0 ? 1 : 0);
+
+      properties.push(property);
+    }
+
+    var mergeableTokens = propertiesAndMergableTokens[0][1];
+    var bestFit = findAllFits(mergeableTokens, valueSize, properties.length)[0];
+    if (bestFit[1] > 0) { return false; }
+
+    var allSelectors = [];
+    var qualifiedTokens = [];
+    for (i = bestFit[0].length - 1; i >= 0; i--) {
+      allSelectors = bestFit[0][i][1].concat(allSelectors);
+      qualifiedTokens.unshift(bestFit[0][i]);
+    }
+
+    allSelectors = tidyRuleDuplicates(allSelectors);
+    dropAsNewTokenAt(position, properties, allSelectors, qualifiedTokens);
+
+    for (i = properties.length - 1; i >= 0; i--) {
+      property = properties[i];
+      var index = movedProperties.indexOf(property);
+
+      delete movableTokens[property[4]];
+
+      if (index > -1 && movedToBeDropped.indexOf(index) == -1) { movedToBeDropped.push(index); }
+    }
+
+    return true;
+  }
+
+  function boundToAnotherPropertyInCurrrentToken(property, movedProperty, token) {
+    var propertyName = property[0];
+    var movedPropertyName = movedProperty[0];
+    if (propertyName != movedPropertyName) { return false; }
+
+    var key = movedProperty[4];
+    var toMove = movableTokens[key];
+    return toMove && toMove.indexOf(token) > -1;
+  }
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+    var isRule;
+    var j, k, m;
+    var samePropertyAt;
+
+    if (token[0] == Token.RULE) {
+      isRule = true;
+    } else if (token[0] == Token.NESTED_BLOCK) {
+      isRule = false;
+    } else {
+      continue;
+    }
+
+    // We cache movedProperties.length as it may change in the loop
+    var movedCount = movedProperties.length;
+
+    var properties = extractProperties(token);
+    movedToBeDropped = [];
+
+    var unmovableInCurrentToken = [];
+    for (j = properties.length - 1; j >= 0; j--) {
+      for (k = j - 1; k >= 0; k--) {
+        if (!canReorderSingle(properties[j], properties[k], specificityCache)) {
+          unmovableInCurrentToken.push(j);
+          break;
+        }
+      }
+    }
+
+    for (j = properties.length - 1; j >= 0; j--) {
+      var property = properties[j];
+      var movedSameProperty = false;
+
+      for (k = 0; k < movedCount; k++) {
+        var movedProperty = movedProperties[k];
+
+        if (movedToBeDropped.indexOf(k) == -1 && (
+          !canReorderSingle(property, movedProperty, specificityCache)
+          && !boundToAnotherPropertyInCurrrentToken(property, movedProperty, token)
+          || movableTokens[movedProperty[4]] && movableTokens[movedProperty[4]].length === mergeLimit)
+        ) {
+          dropPropertiesAt(i + 1, movedProperty);
+
+          if (movedToBeDropped.indexOf(k) == -1) {
+            movedToBeDropped.push(k);
+            delete movableTokens[movedProperty[4]];
+          }
+        }
+
+        if (!movedSameProperty) {
+          movedSameProperty = property[0] == movedProperty[0] && property[1] == movedProperty[1];
+
+          if (movedSameProperty) {
+            samePropertyAt = k;
+          }
+        }
+      }
+
+      if (!isRule || unmovableInCurrentToken.indexOf(j) > -1) { continue; }
+
+      var key = property[4];
+
+      if (movedSameProperty && movedProperties[samePropertyAt][5].length + property[5].length > mergeLimit) {
+        dropPropertiesAt(i + 1, movedProperties[samePropertyAt]);
+        movedProperties.splice(samePropertyAt, 1);
+        movableTokens[key] = [token];
+        movedSameProperty = false;
+      } else {
+        movableTokens[key] = movableTokens[key] || [];
+        movableTokens[key].push(token);
+      }
+
+      if (movedSameProperty) {
+        movedProperties[samePropertyAt] = cloneAndMergeSelectors(movedProperties[samePropertyAt], property);
+      } else {
+        movedProperties.push(property);
+      }
+    }
+
+    movedToBeDropped = movedToBeDropped.sort(naturalSorter);
+    for (j = 0, m = movedToBeDropped.length; j < m; j++) {
+      var dropAt = movedToBeDropped[j] - j;
+      movedProperties.splice(dropAt, 1);
+    }
+  }
+
+  var position = tokens[0] && tokens[0][0] == Token.AT_RULE && tokens[0][1].indexOf('@charset') === 0 ? 1 : 0;
+  for (; position < tokens.length - 1; position++) {
+    var isImportRule = tokens[position][0] === Token.AT_RULE && tokens[position][1].indexOf('@import') === 0;
+    var isComment = tokens[position][0] === Token.COMMENT;
+    if (!(isImportRule || isComment)) { break; }
+  }
+
+  for (i = 0; i < movedProperties.length; i++) {
+    dropPropertiesAt(position, movedProperties[i]);
+  }
+}
+
+module.exports = restructure;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/rules-overlap.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/rules-overlap.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/rules-overlap.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,32 @@
+var MODIFIER_PATTERN = /--.+$/;
+
+function rulesOverlap(rule1, rule2, bemMode) {
+  var scope1;
+  var scope2;
+  var i, l;
+  var j, m;
+
+  for (i = 0, l = rule1.length; i < l; i++) {
+    scope1 = rule1[i][1];
+
+    for (j = 0, m = rule2.length; j < m; j++) {
+      scope2 = rule2[j][1];
+
+      if (scope1 == scope2) {
+        return true;
+      }
+
+      if (bemMode && withoutModifiers(scope1) == withoutModifiers(scope2)) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
+function withoutModifiers(scope) {
+  return scope.replace(MODIFIER_PATTERN, '');
+}
+
+module.exports = rulesOverlap;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/specificities-overlap.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/specificities-overlap.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/specificities-overlap.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,36 @@
+var specificity = require('./specificity');
+
+function specificitiesOverlap(selector1, selector2, cache) {
+  var specificity1;
+  var specificity2;
+  var i, l;
+  var j, m;
+
+  for (i = 0, l = selector1.length; i < l; i++) {
+    specificity1 = findSpecificity(selector1[i][1], cache);
+
+    for (j = 0, m = selector2.length; j < m; j++) {
+      specificity2 = findSpecificity(selector2[j][1], cache);
+
+      if (specificity1[0] === specificity2[0]
+        && specificity1[1] === specificity2[1]
+        && specificity1[2] === specificity2[2]) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
+function findSpecificity(selector, cache) {
+  var value;
+
+  if (!(selector in cache)) {
+    cache[selector] = value = specificity(selector);
+  }
+
+  return value || cache[selector];
+}
+
+module.exports = specificitiesOverlap;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/specificity.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/specificity.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/specificity.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,77 @@
+var Marker = require('../../tokenizer/marker');
+
+var Selector = {
+  ADJACENT_SIBLING: '+',
+  DESCENDANT: '>',
+  DOT: '.',
+  HASH: '#',
+  NON_ADJACENT_SIBLING: '~',
+  PSEUDO: ':'
+};
+
+var LETTER_PATTERN = /[a-zA-Z]/;
+var NOT_PREFIX = ':not(';
+var SEPARATOR_PATTERN = /[\s,(>~+]/;
+
+function specificity(selector) {
+  var result = [0, 0, 0];
+  var character;
+  var isEscaped;
+  var isSingleQuoted;
+  var isDoubleQuoted;
+  var roundBracketLevel = 0;
+  var couldIntroduceNewTypeSelector;
+  var withinNotPseudoClass = false;
+  var wasPseudoClass = false;
+  var i, l;
+
+  for (i = 0, l = selector.length; i < l; i++) {
+    character = selector[i];
+
+    if (isEscaped) {
+      // noop
+    } else if (character == Marker.SINGLE_QUOTE && !isDoubleQuoted && !isSingleQuoted) {
+      isSingleQuoted = true;
+    } else if (character == Marker.SINGLE_QUOTE && !isDoubleQuoted && isSingleQuoted) {
+      isSingleQuoted = false;
+    } else if (character == Marker.DOUBLE_QUOTE && !isDoubleQuoted && !isSingleQuoted) {
+      isDoubleQuoted = true;
+    } else if (character == Marker.DOUBLE_QUOTE && isDoubleQuoted && !isSingleQuoted) {
+      isDoubleQuoted = false;
+    } else if (isSingleQuoted || isDoubleQuoted) {
+      continue;
+    } else if (roundBracketLevel > 0 && !withinNotPseudoClass) {
+      // noop
+    } else if (character == Marker.OPEN_ROUND_BRACKET) {
+      roundBracketLevel++;
+    } else if (character == Marker.CLOSE_ROUND_BRACKET && roundBracketLevel == 1) {
+      roundBracketLevel--;
+      withinNotPseudoClass = false;
+    } else if (character == Marker.CLOSE_ROUND_BRACKET) {
+      roundBracketLevel--;
+    } else if (character == Selector.HASH) {
+      result[0]++;
+    } else if (character == Selector.DOT || character == Marker.OPEN_SQUARE_BRACKET) {
+      result[1]++;
+    } else if (character == Selector.PSEUDO && !wasPseudoClass && !isNotPseudoClass(selector, i)) {
+      result[1]++;
+      withinNotPseudoClass = false;
+    } else if (character == Selector.PSEUDO) {
+      withinNotPseudoClass = true;
+    } else if ((i === 0 || couldIntroduceNewTypeSelector) && LETTER_PATTERN.test(character)) {
+      result[2]++;
+    }
+
+    isEscaped = character == Marker.BACK_SLASH;
+    wasPseudoClass = character == Selector.PSEUDO;
+    couldIntroduceNewTypeSelector = !isEscaped && SEPARATOR_PATTERN.test(character);
+  }
+
+  return result;
+}
+
+function isNotPseudoClass(selector, index) {
+  return selector.indexOf(NOT_PREFIX, index) === index;
+}
+
+module.exports = specificity;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/tidy-rule-duplicates.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/tidy-rule-duplicates.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/level-2/tidy-rule-duplicates.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,21 @@
+function ruleSorter(s1, s2) {
+  return s1[1] > s2[1] ? 1 : -1;
+}
+
+function tidyRuleDuplicates(rules) {
+  var list = [];
+  var repeated = [];
+
+  for (var i = 0, l = rules.length; i < l; i++) {
+    var rule = rules[i];
+
+    if (repeated.indexOf(rule[1]) == -1) {
+      repeated.push(rule[1]);
+      list.push(rule);
+    }
+  }
+
+  return list.sort(ruleSorter);
+}
+
+module.exports = tidyRuleDuplicates;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/remove-unused.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/remove-unused.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/remove-unused.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,11 @@
+function removeUnused(properties) {
+  for (var i = properties.length - 1; i >= 0; i--) {
+    var property = properties[i];
+
+    if (property.unused) {
+      property.all.splice(property.position, 1);
+    }
+  }
+}
+
+module.exports = removeUnused;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/restore-from-optimizing.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/restore-from-optimizing.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/restore-from-optimizing.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,78 @@
+var Hack = require('./hack');
+
+var Marker = require('../tokenizer/marker');
+
+var ASTERISK_HACK = '*';
+var BACKSLASH_HACK = '\\';
+var IMPORTANT_TOKEN = '!important';
+var UNDERSCORE_HACK = '_';
+var BANG_HACK = '!ie';
+
+function restoreFromOptimizing(properties, restoreCallback) {
+  var property;
+  var restored;
+  var current;
+  var i;
+
+  for (i = properties.length - 1; i >= 0; i--) {
+    property = properties[i];
+
+    if (property.dynamic && property.important) {
+      restoreImportant(property);
+      continue;
+    }
+
+    if (property.dynamic) {
+      continue;
+    }
+
+    if (property.unused) {
+      continue;
+    }
+
+    if (!property.dirty && !property.important && !property.hack) {
+      continue;
+    }
+
+    if (property.optimizable && restoreCallback) {
+      restored = restoreCallback(property);
+      property.value = restored;
+    } else {
+      restored = property.value;
+    }
+
+    if (property.important) {
+      restoreImportant(property);
+    }
+
+    if (property.hack) {
+      restoreHack(property);
+    }
+
+    if ('all' in property) {
+      current = property.all[property.position];
+      current[1][1] = property.name;
+
+      current.splice(2, current.length - 1);
+      Array.prototype.push.apply(current, restored);
+    }
+  }
+}
+
+function restoreImportant(property) {
+  property.value[property.value.length - 1][1] += IMPORTANT_TOKEN;
+}
+
+function restoreHack(property) {
+  if (property.hack[0] == Hack.UNDERSCORE) {
+    property.name = UNDERSCORE_HACK + property.name;
+  } else if (property.hack[0] == Hack.ASTERISK) {
+    property.name = ASTERISK_HACK + property.name;
+  } else if (property.hack[0] == Hack.BACKSLASH) {
+    property.value[property.value.length - 1][1] += BACKSLASH_HACK + property.hack[1];
+  } else if (property.hack[0] == Hack.BANG) {
+    property.value[property.value.length - 1][1] += Marker.SPACE + BANG_HACK;
+  }
+}
+
+module.exports = restoreFromOptimizing;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/validator.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/validator.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/validator.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,561 @@
+var functionNoVendorRegexStr = '[A-Z]+(\\-|[A-Z]|[0-9])+\\(.*?\\)';
+var functionVendorRegexStr = '\\-(\\-|[A-Z]|[0-9])+\\(.*?\\)';
+var variableRegexStr = 'var\\(\\-\\-[^\\)]+\\)';
+var functionAnyRegexStr = '(' + variableRegexStr + '|' + functionNoVendorRegexStr + '|' + functionVendorRegexStr + ')';
+
+var calcRegex = new RegExp('^(\\-moz\\-|\\-webkit\\-)?calc\\([^\\)]+\\)$', 'i');
+var decimalRegex = /[0-9]/;
+var functionAnyRegex = new RegExp('^' + functionAnyRegexStr + '$', 'i');
+var hexAlphaColorRegex = /^#(?:[0-9a-f]{4}|[0-9a-f]{8})$/i;
+// eslint-disable-next-line max-len
+var hslColorRegex = /^hsl\(\s{0,31}[-.]?\d+\s{0,31},\s{0,31}\d*\.?\d+%\s{0,31},\s{0,31}\d*\.?\d+%\s{0,31}\)|hsla\(\s{0,31}[-.]?\d+\s{0,31},\s{0,31}\d*\.?\d+%\s{0,31},\s{0,31}\d*\.?\d+%\s{0,31},\s{0,31}\.?\d+\s{0,31}\)$/;
+// eslint-disable-next-line max-len
+var hslColorWithSpacesRegex = /^hsl\(\s{0,31}[-.]?\d+(deg)?\s{1,31}\d*\.?\d+%\s{1,31}\d*\.?\d+%\s{0,31}\)|hsla\(\s{0,31}[-.]?\d+(deg)?\s{1,31}\d*\.?\d+%\s{1,31}\d*\.?\d+%\s{1,31}\/\s{1,31}\d*\.?\d+%?\s{0,31}\)$/;
+var identifierRegex = /^(-[a-z0-9_][a-z0-9\-_]*|[a-z_][a-z0-9\-_]*)$/i;
+var namedEntityRegex = /^[a-z]+$/i;
+var prefixRegex = /^-([a-z0-9]|-)*$/i;
+var quotedTextRegex = /^("[^"]*"|'[^']*')$/i;
+// eslint-disable-next-line max-len
+var rgbColorRegex = /^rgb\(\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31}\)|rgba\(\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[.\d]+\s{0,31}\)$/i;
+// eslint-disable-next-line max-len
+var rgbColorWithSpacesRegex = /^rgb\(\s{0,31}[\d]{1,3}\s{1,31}[\d]{1,3}\s{1,31}[\d]{1,3}\s{0,31}\)|rgba\(\s{0,31}[\d]{1,3}\s{1,31}[\d]{1,3}\s{1,31}[\d]{1,3}\s{1,31}\/\s{1,31}[\d]*\.?[.\d]+%?\s{0,31}\)$/i;
+var timeUnitPattern = /\d+(s|ms)/;
+var timingFunctionRegex = /^(cubic-bezier|steps)\([^)]+\)$/;
+var validTimeUnits = ['ms', 's'];
+var urlRegex = /^url\([\s\S]+\)$/i;
+var variableRegex = new RegExp('^' + variableRegexStr + '$', 'i');
+
+var eightValueColorRegex = /^#[0-9a-f]{8}$/i;
+var fourValueColorRegex = /^#[0-9a-f]{4}$/i;
+var sixValueColorRegex = /^#[0-9a-f]{6}$/i;
+var threeValueColorRegex = /^#[0-9a-f]{3}$/i;
+
+var DECIMAL_DOT = '.';
+var MINUS_SIGN = '-';
+var PLUS_SIGN = '+';
+
+var Keywords = {
+  '^': [
+    'inherit',
+    'initial',
+    'unset'
+  ],
+  '*-style': [
+    'auto',
+    'dashed',
+    'dotted',
+    'double',
+    'groove',
+    'hidden',
+    'inset',
+    'none',
+    'outset',
+    'ridge',
+    'solid'
+  ],
+  '*-timing-function': [
+    'ease',
+    'ease-in',
+    'ease-in-out',
+    'ease-out',
+    'linear',
+    'step-end',
+    'step-start'
+  ],
+  'animation-direction': [
+    'alternate',
+    'alternate-reverse',
+    'normal',
+    'reverse'
+  ],
+  'animation-fill-mode': [
+    'backwards',
+    'both',
+    'forwards',
+    'none'
+  ],
+  'animation-iteration-count': [
+    'infinite'
+  ],
+  'animation-name': [
+    'none'
+  ],
+  'animation-play-state': [
+    'paused',
+    'running'
+  ],
+  'background-attachment': [
+    'fixed',
+    'inherit',
+    'local',
+    'scroll'
+  ],
+  'background-clip': [
+    'border-box',
+    'content-box',
+    'inherit',
+    'padding-box',
+    'text'
+  ],
+  'background-origin': [
+    'border-box',
+    'content-box',
+    'inherit',
+    'padding-box'
+  ],
+  'background-position': [
+    'bottom',
+    'center',
+    'left',
+    'right',
+    'top'
+  ],
+  'background-repeat': [
+    'no-repeat',
+    'inherit',
+    'repeat',
+    'repeat-x',
+    'repeat-y',
+    'round',
+    'space'
+  ],
+  'background-size': [
+    'auto',
+    'cover',
+    'contain'
+  ],
+  'border-collapse': [
+    'collapse',
+    'inherit',
+    'separate'
+  ],
+  bottom: [
+    'auto'
+  ],
+  clear: [
+    'both',
+    'left',
+    'none',
+    'right'
+  ],
+  color: [
+    'transparent'
+  ],
+  cursor: [
+    'all-scroll',
+    'auto',
+    'col-resize',
+    'crosshair',
+    'default',
+    'e-resize',
+    'help',
+    'move',
+    'n-resize',
+    'ne-resize',
+    'no-drop',
+    'not-allowed',
+    'nw-resize',
+    'pointer',
+    'progress',
+    'row-resize',
+    's-resize',
+    'se-resize',
+    'sw-resize',
+    'text',
+    'vertical-text',
+    'w-resize',
+    'wait'
+  ],
+  display: [
+    'block',
+    'inline',
+    'inline-block',
+    'inline-table',
+    'list-item',
+    'none',
+    'table',
+    'table-caption',
+    'table-cell',
+    'table-column',
+    'table-column-group',
+    'table-footer-group',
+    'table-header-group',
+    'table-row',
+    'table-row-group'
+  ],
+  float: [
+    'left',
+    'none',
+    'right'
+  ],
+  left: [
+    'auto'
+  ],
+  font: [
+    'caption',
+    'icon',
+    'menu',
+    'message-box',
+    'small-caption',
+    'status-bar',
+    'unset'
+  ],
+  'font-size': [
+    'large',
+    'larger',
+    'medium',
+    'small',
+    'smaller',
+    'x-large',
+    'x-small',
+    'xx-large',
+    'xx-small'
+  ],
+  'font-stretch': [
+    'condensed',
+    'expanded',
+    'extra-condensed',
+    'extra-expanded',
+    'normal',
+    'semi-condensed',
+    'semi-expanded',
+    'ultra-condensed',
+    'ultra-expanded'
+  ],
+  'font-style': [
+    'italic',
+    'normal',
+    'oblique'
+  ],
+  'font-variant': [
+    'normal',
+    'small-caps'
+  ],
+  'font-weight': [
+    '100',
+    '200',
+    '300',
+    '400',
+    '500',
+    '600',
+    '700',
+    '800',
+    '900',
+    'bold',
+    'bolder',
+    'lighter',
+    'normal'
+  ],
+  'line-height': [
+    'normal'
+  ],
+  'list-style-position': [
+    'inside',
+    'outside'
+  ],
+  'list-style-type': [
+    'armenian',
+    'circle',
+    'decimal',
+    'decimal-leading-zero',
+    'disc',
+    'decimal|disc', // this is the default value of list-style-type, see comment in configuration.js
+    'georgian',
+    'lower-alpha',
+    'lower-greek',
+    'lower-latin',
+    'lower-roman',
+    'none',
+    'square',
+    'upper-alpha',
+    'upper-latin',
+    'upper-roman'
+  ],
+  overflow: [
+    'auto',
+    'hidden',
+    'scroll',
+    'visible'
+  ],
+  position: [
+    'absolute',
+    'fixed',
+    'relative',
+    'static'
+  ],
+  right: [
+    'auto'
+  ],
+  'text-align': [
+    'center',
+    'justify',
+    'left',
+    'left|right', // this is the default value of list-style-type, see comment in configuration.js
+    'right'
+  ],
+  'text-decoration': [
+    'line-through',
+    'none',
+    'overline',
+    'underline'
+  ],
+  'text-overflow': [
+    'clip',
+    'ellipsis'
+  ],
+  top: [
+    'auto'
+  ],
+  'vertical-align': [
+    'baseline',
+    'bottom',
+    'middle',
+    'sub',
+    'super',
+    'text-bottom',
+    'text-top',
+    'top'
+  ],
+  visibility: [
+    'collapse',
+    'hidden',
+    'visible'
+  ],
+  'white-space': [
+    'normal',
+    'nowrap',
+    'pre'
+  ],
+  width: [
+    'inherit',
+    'initial',
+    'medium',
+    'thick',
+    'thin'
+  ]
+};
+
+var Units = [
+  '%',
+  'ch',
+  'cm',
+  'em',
+  'ex',
+  'in',
+  'mm',
+  'pc',
+  'pt',
+  'px',
+  'rem',
+  'vh',
+  'vm',
+  'vmax',
+  'vmin',
+  'vw'
+];
+
+function isColor(value) {
+  return value != 'auto'
+    && (
+      isKeyword('color')(value)
+      || isHexColor(value)
+      || isColorFunction(value)
+      || isNamedEntity(value)
+    );
+}
+
+function isColorFunction(value) {
+  return isRgbColor(value) || isHslColor(value);
+}
+
+function isDynamicUnit(value) {
+  return calcRegex.test(value);
+}
+
+function isFunction(value) {
+  return functionAnyRegex.test(value);
+}
+
+function isHexColor(value) {
+  return threeValueColorRegex.test(value)
+    || fourValueColorRegex.test(value)
+    || sixValueColorRegex.test(value)
+    || eightValueColorRegex.test(value);
+}
+
+function isHslColor(value) {
+  return hslColorRegex.test(value) || hslColorWithSpacesRegex.test(value);
+}
+
+function isHexAlphaColor(value) {
+  return hexAlphaColorRegex.test(value);
+}
+
+function isIdentifier(value) {
+  return identifierRegex.test(value);
+}
+
+function isQuotedText(value) {
+  return quotedTextRegex.test(value);
+}
+
+function isImage(value) {
+  return value == 'none' || value == 'inherit' || isUrl(value);
+}
+
+function isKeyword(propertyName) {
+  return function(value) {
+    return Keywords[propertyName].indexOf(value) > -1;
+  };
+}
+
+function isNamedEntity(value) {
+  return namedEntityRegex.test(value);
+}
+
+function isNumber(value) {
+  return scanForNumber(value) == value.length;
+}
+
+function isRgbColor(value) {
+  return rgbColorRegex.test(value) || rgbColorWithSpacesRegex.test(value);
+}
+
+function isPrefixed(value) {
+  return prefixRegex.test(value);
+}
+
+function isPositiveNumber(value) {
+  return isNumber(value)
+    && parseFloat(value) >= 0;
+}
+
+function isVariable(value) {
+  return variableRegex.test(value);
+}
+
+function isTime(value) {
+  var numberUpTo = scanForNumber(value);
+
+  return numberUpTo == value.length && parseInt(value) === 0
+    || numberUpTo > -1 && validTimeUnits.indexOf(value.slice(numberUpTo + 1)) > -1
+    || isCalculatedTime(value);
+}
+
+function isCalculatedTime(value) {
+  return isFunction(value) && timeUnitPattern.test(value);
+}
+
+function isTimingFunction() {
+  var isTimingFunctionKeyword = isKeyword('*-timing-function');
+
+  return function(value) {
+    return isTimingFunctionKeyword(value) || timingFunctionRegex.test(value);
+  };
+}
+
+function isUnit(validUnits, value) {
+  var numberUpTo = scanForNumber(value);
+
+  return numberUpTo == value.length && parseInt(value) === 0
+    || numberUpTo > -1 && validUnits.indexOf(value.slice(numberUpTo + 1).toLowerCase()) > -1
+    || value == 'auto'
+    || value == 'inherit';
+}
+
+function isUrl(value) {
+  return urlRegex.test(value);
+}
+
+function isZIndex(value) {
+  return value == 'auto'
+    || isNumber(value)
+    || isKeyword('^')(value);
+}
+
+function scanForNumber(value) {
+  var hasDot = false;
+  var hasSign = false;
+  var character;
+  var i, l;
+
+  for (i = 0, l = value.length; i < l; i++) {
+    character = value[i];
+
+    if (i === 0 && (character == PLUS_SIGN || character == MINUS_SIGN)) {
+      hasSign = true;
+    } else if (i > 0 && hasSign && (character == PLUS_SIGN || character == MINUS_SIGN)) {
+      return i - 1;
+    } else if (character == DECIMAL_DOT && !hasDot) {
+      hasDot = true;
+    } else if (character == DECIMAL_DOT && hasDot) {
+      return i - 1;
+    } else if (decimalRegex.test(character)) {
+      continue;
+    } else {
+      return i - 1;
+    }
+  }
+
+  return i;
+}
+
+function validator(compatibility) {
+  var validUnits = Units.slice(0).filter(function(value) {
+    return !(value in compatibility.units) || compatibility.units[value] === true;
+  });
+
+  if (compatibility.customUnits.rpx) {
+    validUnits.push('rpx');
+  }
+
+  return {
+    colorOpacity: compatibility.colors.opacity,
+    colorHexAlpha: compatibility.colors.hexAlpha,
+    isAnimationDirectionKeyword: isKeyword('animation-direction'),
+    isAnimationFillModeKeyword: isKeyword('animation-fill-mode'),
+    isAnimationIterationCountKeyword: isKeyword('animation-iteration-count'),
+    isAnimationNameKeyword: isKeyword('animation-name'),
+    isAnimationPlayStateKeyword: isKeyword('animation-play-state'),
+    isTimingFunction: isTimingFunction(),
+    isBackgroundAttachmentKeyword: isKeyword('background-attachment'),
+    isBackgroundClipKeyword: isKeyword('background-clip'),
+    isBackgroundOriginKeyword: isKeyword('background-origin'),
+    isBackgroundPositionKeyword: isKeyword('background-position'),
+    isBackgroundRepeatKeyword: isKeyword('background-repeat'),
+    isBackgroundSizeKeyword: isKeyword('background-size'),
+    isColor: isColor,
+    isColorFunction: isColorFunction,
+    isDynamicUnit: isDynamicUnit,
+    isFontKeyword: isKeyword('font'),
+    isFontSizeKeyword: isKeyword('font-size'),
+    isFontStretchKeyword: isKeyword('font-stretch'),
+    isFontStyleKeyword: isKeyword('font-style'),
+    isFontVariantKeyword: isKeyword('font-variant'),
+    isFontWeightKeyword: isKeyword('font-weight'),
+    isFunction: isFunction,
+    isGlobal: isKeyword('^'),
+    isHexAlphaColor: isHexAlphaColor,
+    isHslColor: isHslColor,
+    isIdentifier: isIdentifier,
+    isImage: isImage,
+    isKeyword: isKeyword,
+    isLineHeightKeyword: isKeyword('line-height'),
+    isListStylePositionKeyword: isKeyword('list-style-position'),
+    isListStyleTypeKeyword: isKeyword('list-style-type'),
+    isNumber: isNumber,
+    isPrefixed: isPrefixed,
+    isPositiveNumber: isPositiveNumber,
+    isQuotedText: isQuotedText,
+    isRgbColor: isRgbColor,
+    isStyleKeyword: isKeyword('*-style'),
+    isTime: isTime,
+    isUnit: isUnit.bind(null, validUnits),
+    isUrl: isUrl,
+    isVariable: isVariable,
+    isWidth: isKeyword('width'),
+    isZIndex: isZIndex
+  };
+}
+
+module.exports = validator;
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/vendor-prefixes.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/vendor-prefixes.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/vendor-prefixes.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,24 @@
+var VENDOR_PREFIX_PATTERN = /(?:^|\W)(-\w+-)/g;
+
+function unique(value) {
+  var prefixes = [];
+  var match;
+
+  // eslint-disable-next-line no-cond-assign
+  while ((match = VENDOR_PREFIX_PATTERN.exec(value)) !== null) {
+    if (prefixes.indexOf(match[0]) == -1) {
+      prefixes.push(match[0]);
+    }
+  }
+
+  return prefixes;
+}
+
+function same(value1, value2) {
+  return unique(value1).sort().join(',') == unique(value2).sort().join(',');
+}
+
+module.exports = {
+  unique: unique,
+  same: same
+};
Index: imaps-frontend/node_modules/clean-css/lib/optimizer/wrap-for-optimizing.js
===================================================================
--- imaps-frontend/node_modules/clean-css/lib/optimizer/wrap-for-optimizing.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/clean-css/lib/optimizer/wrap-for-optimizing.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,192 @@
+var Hack = require('./hack');
+
+var Marker = require('../tokenizer/marker');
+var Token = require('../tokenizer/token');
+
+var Match = {
+  ASTERISK: '*',
+  BACKSLASH: '\\',
+  BANG: '!',
+  BANG_SUFFIX_PATTERN: /!\w+$/,
+  IMPORTANT_TOKEN: '!important',
+  IMPORTANT_TOKEN_PATTERN: new RegExp('!important$', 'i'),
+  IMPORTANT_WORD: 'important',
+  IMPORTANT_WORD_PATTERN: new RegExp('important$', 'i'),
+  SUFFIX_BANG_PATTERN: /!$/,
+  UNDERSCORE: '_',
+  VARIABLE_REFERENCE_PATTERN: /var\(--.+\)$/
+};
+
+function wrapAll(properties, skipProperties) {
+  var wrapped = [];
+  var single;
+  var property;
+  var i;
+
+  for (i = properties.length - 1; i >= 0; i--) {
+    property = properties[i];
+
+    if (property[0] != Token.PROPERTY) {
+      continue;
+    }
+
+    if (skipProperties && skipProperties.indexOf(property[1][1]) > -1) {
+      continue;
+    }
+
+    single = wrapSingle(property);
+    single.all = properties;
+    single.position = i;
+    wrapped.unshift(single);
+  }
+
+  return wrapped;
+}
+
+function someVariableReferences(property) {
+  var i, l;
+  var value;
+
+  // skipping `property` and property name tokens
+  for (i = 2, l = property.length; i < l; i++) {
+    value = property[i];
+
+    if (value[0] != Token.PROPERTY_VALUE) {
+      continue;
+    }
+
+    if (isVariableReference(value[1])) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function isVariableReference(value) {
+  return Match.VARIABLE_REFERENCE_PATTERN.test(value);
+}
+
+function isMultiplex(property) {
+  var value;
+  var i, l;
+
+  for (i = 3, l = property.length; i < l; i++) {
+    value = property[i];
+
+    if (value[0] == Token.PROPERTY_VALUE && (value[1] == Marker.COMMA || value[1] == Marker.FORWARD_SLASH)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function hackFrom(property) {
+  var match = false;
+  var name = property[1][1];
+  var lastValue = property[property.length - 1];
+
+  if (name[0] == Match.UNDERSCORE) {
+    match = [Hack.UNDERSCORE];
+  } else if (name[0] == Match.ASTERISK) {
+    match = [Hack.ASTERISK];
+  } else if (lastValue[1][0] == Match.BANG && !lastValue[1].match(Match.IMPORTANT_WORD_PATTERN)) {
+    match = [Hack.BANG];
+  } else if (lastValue[1].indexOf(Match.BANG) > 0
+    && !lastValue[1].match(Match.IMPORTANT_WORD_PATTERN)
+    && Match.BANG_SUFFIX_PATTERN.test(lastValue[1])) {
+    match = [Hack.BANG];
+  } else if (lastValue[1].indexOf(Match.BACKSLASH) > 0
+    && lastValue[1].indexOf(Match.BACKSLASH) == lastValue[1].length - Match.BACKSLASH.length - 1) {
+    match = [Hack.BACKSLASH, lastValue[1].substring(lastValue[1].indexOf(Match.BACKSLASH) + 1)];
+  } else if (lastValue[1].indexOf(Match.BACKSLASH) === 0 && lastValue[1].length == 2) {
+    match = [Hack.BACKSLASH, lastValue[1].substring(1)];
+  }
+
+  return match;
+}
+
+function isImportant(property) {
+  if (property.length < 3) { return false; }
+
+  var lastValue = property[property.length - 1];
+  if (Match.IMPORTANT_TOKEN_PATTERN.test(lastValue[1])) {
+    return true;
+  } if (Match.IMPORTANT_WORD_PATTERN.test(lastValue[1])
+    && Match.SUFFIX_BANG_PATTERN.test(property[property.length - 2][1])) {
+    return true;
+  }
+
+  return false;
+}
+
+function stripImportant(property) {
+  var lastValue = property[property.length - 1];
+  var oneButLastValue = property[property.length - 2];
+
+  if (Match.IMPORTANT_TOKEN_PATTERN.test(lastValue[1])) {
+    lastValue[1] = lastValue[1].replace(Match.IMPORTANT_TOKEN_PATTERN, '');
+  } else {
+    lastValue[1] = lastValue[1].replace(Match.IMPORTANT_WORD_PATTERN, '');
+    oneButLastValue[1] = oneButLastValue[1].replace(Match.SUFFIX_BANG_PATTERN, '');
+  }
+
+  if (lastValue[1].length === 0) {
+    property.pop();
+  }
+
+  if (oneButLastValue[1].length === 0) {
+    property.pop();
+  }
+}
+
+function stripPrefixHack(property) {
+  property[1][1] = property[1][1].substring(1);
+}
+
+function stripSuffixHack(property, hackFrom) {
+  var lastValue = property[property.length - 1];
+  lastValue[1] = lastValue[1]
+    .substring(0, lastValue[1].indexOf(hackFrom[0] == Hack.BACKSLASH ? Match.BACKSLASH : Match.BANG))
+    .trim();
+
+  if (lastValue[1].length === 0) {
+    property.pop();
+  }
+}
+
+function wrapSingle(property) {
+  var importantProperty = isImportant(property);
+  if (importantProperty) {
+    stripImportant(property);
+  }
+
+  var whichHack = hackFrom(property);
+  if (whichHack[0] == Hack.ASTERISK || whichHack[0] == Hack.UNDERSCORE) {
+    stripPrefixHack(property);
+  } else if (whichHack[0] == Hack.BACKSLASH || whichHack[0] == Hack.BANG) {
+    stripSuffixHack(property, whichHack);
+  }
+
+  return {
+    block: property[2] && property[2][0] == Token.PROPERTY_BLOCK,
+    components: [],
+    dirty: false,
+    dynamic: someVariableReferences(property),
+    hack: whichHack,
+    important: importantProperty,
+    name: property[1][1],
+    multiplex: property.length > 3 ? isMultiplex(property) : false,
+    optimizable: true,
+    position: 0,
+    shorthand: false,
+    unused: false,
+    value: property.slice(2)
+  };
+}
+
+module.exports = {
+  all: wrapAll,
+  single: wrapSingle
+};
