index.css

@import "tailwindcss";
@import "tw-animate-css";

@custom-variant dark (&:is(.dark *));

@theme inline {
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);
  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --color-card: var(--card);
  --color-card-foreground: var(--card-foreground);
  --color-popover: var(--popover);
  --color-popover-foreground: var(--popover-foreground);
  --color-primary: var(--primary);
  --color-primary-foreground: var(--primary-foreground);
  --color-secondary: var(--secondary);
  --color-secondary-foreground: var(--secondary-foreground);
  --color-muted: var(--muted);
  --color-muted-foreground: var(--muted-foreground);
  --color-accent: var(--accent);
  --color-accent-foreground: var(--accent-foreground);
  --color-destructive: var(--destructive);
  --color-destructive-foreground: var(--destructive-foreground);
  --color-border: var(--border);
  --color-input: var(--input);
  --color-ring: var(--ring);
  --color-chart-1: var(--chart-1);
  --color-chart-2: var(--chart-2);
  --color-chart-3: var(--chart-3);
  --color-chart-4: var(--chart-4);
  --color-chart-5: var(--chart-5);
  --color-sidebar: var(--sidebar);
  --color-sidebar-foreground: var(--sidebar-foreground);
  --color-sidebar-primary: var(--sidebar-primary);
  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
  --color-sidebar-accent: var(--sidebar-accent);
  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
  --color-sidebar-border: var(--sidebar-border);
  --color-sidebar-ring: var(--sidebar-ring);
}

:root {
  --primary: var(--color-blue-700);
  --primary-foreground: var(--color-blue-50);
  --sidebar-primary: var(--color-blue-600);
  --sidebar-primary-foreground: var(--color-blue-50);
  --chart-1: var(--color-blue-300);
  --chart-2: var(--color-blue-500);
  --chart-3: var(--color-blue-600);
  --chart-4: var(--color-blue-700);
  --chart-5: var(--color-blue-800);
  --radius: 0.65rem;
  --background: oklch(1 0 0);
  --foreground: oklch(0.235 0.015 65);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.235 0.015 65);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.235 0.015 65);
  --secondary: oklch(0.98 0.001 286.375);
  --secondary-foreground: oklch(0.4 0.015 65);
  --muted: oklch(0.967 0.001 286.375);
  --muted-foreground: oklch(0.552 0.016 285.938);
  --accent: oklch(0.967 0.001 286.375);
  --accent-foreground: oklch(0.141 0.005 285.823);
  --destructive: oklch(0.577 0.245 27.325);
  --destructive-foreground: oklch(0.985 0 0);
  --border: oklch(0.92 0.004 286.32);
  --input: oklch(0.92 0.004 286.32);
  --ring: oklch(0.623 0.214 259.815);
  --sidebar: oklch(0.985 0 0);
  --sidebar-foreground: oklch(0.235 0.015 65);
  --sidebar-accent: oklch(0.967 0.001 286.375);
  --sidebar-accent-foreground: oklch(0.141 0.005 285.823);
  --sidebar-border: oklch(0.92 0.004 286.32);
  --sidebar-ring: oklch(0.623 0.214 259.815);
}

.dark {
  --primary: oklch(0.623 0.214 259.815);
  --primary-foreground: oklch(0.141 0.005 285.823);
  --sidebar-primary: oklch(0.623 0.214 259.815);
  --sidebar-primary-foreground: oklch(0.141 0.005 285.823);
  --background: oklch(0.07 0.002 0);
  --foreground: oklch(0.95 0.002 0);
  --card: oklch(0.15 0.003 0);
  --card-foreground: oklch(0.95 0.002 0);
  --popover: oklch(0.15 0.003 0);
  --popover-foreground: oklch(0.95 0.002 0);
  --secondary: oklch(0.55 0.15 264);
  --secondary-foreground: oklch(0.95 0.002 0);
  --muted: oklch(0.35 0.05 0);
  --muted-foreground: oklch(0.75 0.01 0);
  --accent: oklch(0.65 0.18 280);
  --accent-foreground: oklch(0.95 0.002 0);
  --destructive: oklch(0.704 0.191 22.216);
  --destructive-foreground: oklch(0.985 0 0);
  --border: oklch(1 0 0 / 8%);
  --input: oklch(1 0 0 / 12%);
  --ring: oklch(0.623 0.214 259.815);
  --chart-1: oklch(0.623 0.214 259.815);
  --chart-2: oklch(0.55 0.15 264);
  --chart-3: oklch(0.65 0.18 280);
  --chart-4: oklch(0.623 0.214 259.815);
  --chart-5: oklch(0.55 0.15 264);
  --sidebar: oklch(0.15 0.003 0);
  --sidebar-foreground: oklch(0.95 0.002 0);
  --sidebar-accent: oklch(0.65 0.18 280);
  --sidebar-accent-foreground: oklch(0.95 0.002 0);
  --sidebar-border: oklch(1 0 0 / 8%);
  --sidebar-ring: oklch(0.623 0.214 259.815);
}

@layer base {
  * {
    @apply border-border outline-ring/50;
  }
  body {
    @apply bg-background text-foreground;
  }
  button:not(:disabled),
  [role="button"]:not([aria-disabled="true"]),
  [type="button"]:not(:disabled),
  [type="submit"]:not(:disabled),
  [type="reset"]:not(:disabled),
  a[href],
  select:not(:disabled),
  input[type="checkbox"]:not(:disabled),
  input[type="radio"]:not(:disabled) {
    @apply cursor-pointer;
  }
}

@layer components {
  /**
   * Custom container utility that centers content and adds responsive padding.
   *
   * This overrides Tailwind's default container behavior to:
   * - Auto-center content (mx-auto)
   * - Add responsive horizontal padding
   * - Set max-width for large screens
   *
   * Usage: <div className="container">...</div>
   *
   * For custom widths, use max-w-* utilities directly:
   * <div className="max-w-6xl mx-auto px-4">...</div>
   */
  .container {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem; /* 16px - mobile padding */
    padding-right: 1rem;
  }

  .flex {
    min-height: 0;
    min-width: 0;
  }

  @media (min-width: 640px) {
    .container {
      padding-left: 1.5rem; /* 24px - tablet padding */
      padding-right: 1.5rem;
    }
  }

  @media (min-width: 1024px) {
    .container {
      padding-left: 2rem; /* 32px - desktop padding */
      padding-right: 2rem;
      max-width: 1280px; /* Standard content width */
    }
  }
}

/* ============================================================================
   Glassmorphism Components - 21dev Design
   ============================================================================ */

@layer components {
  .glass-panel {
    @apply bg-white/5 backdrop-blur-2xl border border-white/10 rounded-2xl;
  }

  .glass-panel-lg {
    @apply bg-white/5 backdrop-blur-3xl border border-white/10 rounded-3xl;
  }

  .glow-primary {
    @apply shadow-lg shadow-primary/20;
  }

  .glow-accent {
    @apply shadow-lg shadow-accent/20;
  }

  .gradient-text {
    @apply bg-gradient-to-r from-primary via-accent to-secondary bg-clip-text text-transparent;
  }

  .transition-smooth {
    @apply transition-all duration-300 ease-in-out;
  }

  .focus-ring {
    @apply focus:outline-none focus:ring-2 focus:ring-primary/50 focus:ring-offset-2 focus:ring-offset-background;
  }

  .btn-primary {
    @apply px-4 py-2 rounded-lg bg-primary text-primary-foreground font-medium transition-smooth hover:shadow-lg hover:shadow-primary/30 active:scale-95;
  }

  .btn-secondary {
    @apply px-4 py-2 rounded-lg bg-secondary text-secondary-foreground font-medium transition-smooth hover:shadow-lg hover:shadow-secondary/30 active:scale-95;
  }

  .btn-ghost {
    @apply px-4 py-2 rounded-lg bg-transparent text-foreground font-medium transition-smooth hover:bg-white/5 active:scale-95;
  }

  .input-glass {
    @apply glass-panel px-4 py-3 text-foreground placeholder-muted-foreground focus-ring;
  }

  .code-block {
    @apply glass-panel p-4 overflow-x-auto;
  }

  .markdown {
    @apply space-y-4;
  }

  .markdown strong {
    @apply font-bold text-primary;
  }

  .markdown a {
    @apply text-primary hover:underline;
  }

  .markdown table {
    @apply w-full border-collapse glass-panel p-4;
  }

  .markdown th {
    @apply bg-primary/10 px-4 py-2 text-left font-semibold text-primary;
  }

  .markdown td {
    @apply border-t border-border px-4 py-2 text-foreground/90;
  }

  .markdown blockquote {
    @apply border-l-4 border-primary pl-4 py-2 text-muted-foreground italic;
  }

  .markdown pre {
    @apply code-block;
  }
}

/* ============================================================================
   Animations
   ============================================================================ */

@layer utilities {
  @keyframes fade-in {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }

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

  @keyframes pulse-glow {
    0%, 100% {
      opacity: 1;
    }
    50% {
      opacity: 0.7;
    }
  }

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

  .animate-slide-up {
    animation: slide-up 0.3s ease-in-out;
  }

  .animate-pulse-glow {
    animation: pulse-glow 2s ease-in-out infinite;
  }
}

/* Scrollbar styling */
html::-webkit-scrollbar {
  width: 8px;
}

html::-webkit-scrollbar-track {
  background: transparent;
}

html::-webkit-scrollbar-thumb {
  background-color: oklch(0.623 0.214 259.815 / 0.3);
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: content-box;
}

html::-webkit-scrollbar-thumb:hover {
  background-color: oklch(0.623 0.214 259.815 / 0.5);
}