@tailwind base;
@tailwind components;
@tailwind utilities;

@layer base {
  :root {
    --background: 0 0% 100%;
    --foreground: 222.2 84% 4.9%;
    --card: 0 0% 100%;
    --card-foreground: 222.2 84% 4.9%;
    --popover: 0 0% 100%;
    --popover-foreground: 222.2 84% 4.9%;
    --primary: 221.2 83.2% 53.3%;
    --primary-foreground: 210 40% 98%;
    --secondary: 210 40% 96.1%;
    --secondary-foreground: 222.2 47.4% 11.2%;
    --muted: 210 40% 96.1%;
    --muted-foreground: 215.4 16.3% 46.9%;
    --accent: 210 40% 96.1%;
    --accent-foreground: 222.2 47.4% 11.2%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 210 40% 98%;
    --border: 214.3 31.8% 91.4%;
    --input: 214.3 31.8% 91.4%;
    --ring: 221.2 83.2% 53.3%;
    --radius: 0.5rem;
  }

  .dark {
    --background: 222.2 84% 4.9%;
    --foreground: 210 40% 98%;
    --card: 222.2 84% 4.9%;
    --card-foreground: 210 40% 98%;
    --popover: 222.2 84% 4.9%;
    --popover-foreground: 210 40% 98%;
    --primary: 217.2 91.2% 59.8%;
    --primary-foreground: 222.2 47.4% 11.2%;
    --secondary: 217.2 32.6% 17.5%;
    --secondary-foreground: 210 40% 98%;
    --muted: 217.2 32.6% 17.5%;
    --muted-foreground: 215 20.2% 65.1%;
    --accent: 217.2 32.6% 17.5%;
    --accent-foreground: 210 40% 98%;
    --destructive: 0 62.8% 30.6%;
    --destructive-foreground: 210 40% 98%;
    --border: 217.2 32.6% 17.5%;
    --input: 217.2 32.6% 17.5%;
    --ring: 224.3 76.3% 48%;
  }
}

@layer base {
  * {
    @apply border-border;
  }
  body {
    @apply bg-background text-foreground;
  }
}

/* KaTeX Styles */
@layer components {
  .katex {
    font-size: 1.1em;
  }

  .katex-display {
    margin: 1.5em 0;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0.5em 0;
  }

  .math-formula {
    @apply my-4 px-4 py-2 bg-muted/30 rounded-lg border border-border/50;
  }

  .math-inline {
    @apply px-1 py-0.5 bg-muted/20 rounded text-sm;
  }
}

/* Custom Scrollbar */
@layer utilities {
  .scrollbar-thin::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }

  .scrollbar-thin::-webkit-scrollbar-track {
    @apply bg-muted;
  }

  .scrollbar-thin::-webkit-scrollbar-thumb {
    @apply bg-muted-foreground/30 rounded-full;
  }

  .scrollbar-thin::-webkit-scrollbar-thumb:hover {
    @apply bg-muted-foreground/50;
  }
}

/* Animation Classes */
@layer utilities {
  .animate-in {
    animation: enter 0.3s ease-out;
  }

  .animate-out {
    animation: exit 0.3s ease-in forwards;
  }

  @keyframes enter {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes exit {
    from {
      opacity: 1;
      transform: translateY(0);
    }
    to {
      opacity: 0;
      transform: translateY(-10px);
    }
  }
}

/* Print Styles */
@media print {
  body {
    @apply text-black bg-white;
  }

  .no-print {
    display: none !important;
  }

  .page-break {
    page-break-before: always;
  }
}

/* Accessibility */
@layer utilities {
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }

  .focus-ring:focus {
    @apply outline-none ring-2 ring-ring ring-offset-2 ring-offset-background;
  }
}

/* Loading States */
@layer utilities {
  .skeleton {
    @apply animate-pulse bg-muted rounded;
  }

  .loading-shimmer {
    background: linear-gradient(
      90deg,
      transparent,
      rgba(255, 255, 255, 0.2),
      transparent
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
  }

  @keyframes shimmer {
    0% {
      background-position: -200% 0;
    }
    100% {
      background-position: 200% 0;
    }
  }
}
