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

@layer base {
  /* Light mode (default) */
  :root {
    /* Backgrounds & Surfaces */
    --background: 0 0% 100%; /* Pure white */
    --surface: 210 20% 98%; /* Off-white */
    --surface-elevated: 0 0% 100%; /* White (elevated) */
    --surface-overlay: 0 0% 98%; /* Light gray */

    /* Foreground (Text) */
    --foreground: 222 47% 11%; /* Almost black */
    --foreground-secondary: 215 16% 47%; /* Medium gray */
    --foreground-tertiary: 215 16% 65%; /* Light gray */
    --foreground-muted: 215 16% 75%; /* Very light gray */

    /* Borders */
    --border: 214 32% 91%; /* Light gray */
    --border-strong: 214 32% 80%; /* Medium gray */
    --border-subtle: 214 20% 95%; /* Very light gray */

    /* Interactive States */
    --primary: 222 47% 11%; /* Dark for light mode */
    --primary-foreground: 210 40% 98%; /* Light text */
    --secondary: 210 40% 96%; /* Light secondary */
    --secondary-foreground: 222 47% 11%; /* Dark text */
    --accent: 210 40% 96%; /* Accent bg */
    --accent-foreground: 222 47% 11%; /* Accent text */
    --muted: 210 40% 96%; /* Muted bg */
    --muted-foreground: 215 16% 47%; /* Muted text */

    /* Status Colors */
    --success: 142 71% 45%;
    --success-foreground: 142 76% 15%;
    --error: 0 72% 51%;
    --error-foreground: 0 86% 17%;
    --warning: 38 92% 50%;
    --warning-foreground: 48 96% 19%;
    --info: 217 91% 60%;
    --info-foreground: 214 95% 23%;

    /* Destructive (legacy) */
    --destructive: 0 84% 60%;
    --destructive-foreground: 210 40% 98%;

    /* Form Elements */
    --input: 214 32% 91%;
    --ring: 222 84% 5%;
    --ring-offset: 0 0% 100%;

    /* Grid/Blueprint Pattern */
    --grid-color: 214 32% 95%;
    --grid-size: 24px; /* Grid cell size */

    /* Card */
    --card: 0 0% 100%;
    --card-foreground: 222 47% 11%;

    /* Border Radii */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius: var(--radius-md);

    /* Typography */
    --font-sans: "Geist", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-mono: "Geist Mono", "SF Mono", Consolas, monospace;
  }

  /* Dark mode (opt-in) - Vercel/Cursor/Perplexity aesthetic */
  .dark {
    /* Backgrounds & Surfaces */
    --background: 210 10% 5%; /* #0d0d0f - Almost black */
    --surface: 210 10% 8%; /* #14141a - Slightly lighter */
    --surface-elevated: 210 10% 12%; /* #1c1c24 - Cards, modals */
    --surface-overlay: 210 10% 16%; /* #25252f - Overlays, popovers */

    /* Foreground (Text) */
    --foreground: 210 10% 90%; /* #e3e3e8 - Primary text */
    --foreground-secondary: 210 8% 60%; /* #949499 - Secondary text */
    --foreground-tertiary: 210 6% 40%; /* #64646a - Tertiary text */
    --foreground-muted: 210 6% 30%; /* #4a4a50 - Muted text */

    /* Borders (1px, subtle) */
    --border: 210 10% 20%; /* #30303a - Default border */
    --border-strong: 210 12% 30%; /* #494954 - Emphasized border */
    --border-subtle: 210 8% 15%; /* #22222c - Subtle border */

    /* Interactive States */
    --primary: 210 10% 98%; /* White-ish for dark mode */
    --primary-foreground: 210 10% 5%; /* Dark text on light bg */
    --secondary: 210 10% 15%; /* Dark secondary */
    --secondary-foreground: 210 10% 90%; /* Light text on dark bg */
    --accent: 210 10% 18%; /* Accent background */
    --accent-foreground: 210 10% 95%; /* Accent text */
    --muted: 210 10% 12%; /* Muted background */
    --muted-foreground: 210 8% 60%; /* Muted text */

    /* Status Colors (desaturated for dark mode) */
    --success: 142 71% 45%; /* #10b981 - Green */
    --success-foreground: 142 76% 95%; /* Light green text */
    --error: 0 72% 51%; /* #ef4444 - Red */
    --error-foreground: 0 86% 97%; /* Light red text */
    --warning: 38 92% 50%; /* #f59e0b - Amber */
    --warning-foreground: 48 96% 89%; /* Light amber text */
    --info: 217 91% 60%; /* #3b82f6 - Blue */
    --info-foreground: 214 95% 93%; /* Light blue text */

    /* Destructive (legacy support) */
    --destructive: 0 72% 51%;
    --destructive-foreground: 0 86% 97%;

    /* Form Elements */
    --input: 210 10% 20%; /* Input border */
    --ring: 210 10% 90%; /* Focus ring */
    --ring-offset: 210 10% 5%; /* Focus ring offset */

    /* Grid/Blueprint Pattern */
    --grid-color: 210 10% 15%; /* Grid line color */

    /* Card */
    --card: 210 10% 8%;
    --card-foreground: 210 10% 90%;
  }

  /* Base element styles */
  * {
    @apply border-border;
  }

  body {
    @apply bg-background text-foreground;
    font-family: var(--font-sans);
    font-feature-settings: "rlig" 1, "calt" 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  /* Grid/Blueprint background patterns */
  .grid-background {
    background-image: linear-gradient(hsl(var(--grid-color)) 1px, transparent 1px),
      linear-gradient(90deg, hsl(var(--grid-color)) 1px, transparent 1px);
    background-size: var(--grid-size) var(--grid-size);
    background-position: -1px -1px;
  }

  .dotted-grid-background {
    background-image: radial-gradient(circle, hsl(var(--grid-color)) 1px, transparent 1px);
    background-size: var(--grid-size) var(--grid-size);
  }

  .blueprint-background {
    background-color: hsl(var(--background));
    /* Major grid lines (4x size) */
    background-image: linear-gradient(hsl(var(--grid-color)) 1px, transparent 1px),
      linear-gradient(90deg, hsl(var(--grid-color)) 1px, transparent 1px),
      /* Minor grid lines (1x size) */
      linear-gradient(hsl(var(--grid-color) / 0.3) 1px, transparent 1px),
      linear-gradient(90deg, hsl(var(--grid-color) / 0.3) 1px, transparent 1px);
    background-size: calc(var(--grid-size) * 4) calc(var(--grid-size) * 4),
      calc(var(--grid-size) * 4) calc(var(--grid-size) * 4), var(--grid-size) var(--grid-size),
      var(--grid-size) var(--grid-size);
  }

  /* Animated grid (subtle pulse) */
  .grid-background-animated {
    @apply grid-background;
    animation: grid-pulse 8s ease-in-out infinite;
  }

  @keyframes grid-pulse {
    0%,
    100% {
      opacity: 0.4;
    }
    50% {
      opacity: 0.6;
    }
  }
}

@layer utilities {
  /* Border utilities */
  .border-1 {
    border-width: 1px;
  }

  .border-dotted-1 {
    border-width: 1px;
    border-style: dotted;
  }

  .border-dashed-1 {
    border-width: 1px;
    border-style: dashed;
  }

  /* Directional dotted borders */
  .border-t-dotted {
    border-top-width: 1px;
    border-top-style: dotted;
  }

  .border-b-dotted {
    border-bottom-width: 1px;
    border-bottom-style: dotted;
  }

  .border-l-dotted {
    border-left-width: 1px;
    border-left-style: dotted;
  }

  .border-r-dotted {
    border-right-width: 1px;
    border-right-style: dotted;
  }

  /* Transition presets */
  .transition-base {
    transition-property: background-color, border-color, color, fill, stroke;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 200ms;
  }

  .transition-transform {
    transition-property: transform;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 200ms;
  }

  .transition-all-smooth {
    transition-property: all;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 300ms;
  }

  /* Hover effects */
  .hover-lift {
    @apply transition-transform hover:-translate-y-0.5 hover:shadow-md;
  }

  /* Focus ring (modern, accessible) */
  .focus-ring {
    @apply focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background;
  }

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

  @keyframes shimmer {
    0% {
      background-position: -1000px 0;
    }
    100% {
      background-position: 1000px 0;
    }
  }

  .animate-slide-up {
    animation: slide-up 300ms cubic-bezier(0.4, 0, 0.2, 1);
  }

  .animate-shimmer {
    animation: shimmer 2s infinite linear;
    background: linear-gradient(
      90deg,
      hsl(var(--muted)) 0%,
      hsl(var(--accent)) 50%,
      hsl(var(--muted)) 100%
    );
    background-size: 1000px 100%;
  }
}