source: chapterx-frontend/src/components/ui/Spinner.tsx

import React from 'react'

interface SpinnerProps {
  size?: 'sm' | 'md' | 'lg'
  className?: string
}

const sizes = { sm: 'h-4 w-4', md: 'h-8 w-8', lg: 'h-12 w-12' }

export const Spinner: React.FC<SpinnerProps> = ({ size = 'md', className = '' }) => (
  <svg
    className={`animate-spin ${sizes[size]} text-indigo-400 ${className}`}
    xmlns="http://www.w3.org/2000/svg"
    fill="none"
    viewBox="0 0 24 24"
  >
    <circle
      className="opacity-25"
      cx="12"
      cy="12"
      r="10"
      stroke="currentColor"
      strokeWidth="4"
    />
    <path
      className="opacity-75"
      fill="currentColor"
      d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"
    />
  </svg>
)