@import 'tailwindcss';
@import 'tw-animate-css';
@import 'shadcn/tailwind.css';

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

@theme inline {
  --font-heading: var(--font-oswald);
  --font-sans: var(--font-plex-mono), 'Geist Fallback';
  --font-mono: var(--font-plex-mono), 'Geist Mono Fallback';
  --color-sidebar-ring: var(--sidebar-ring);
  --color-sidebar-border: var(--sidebar-border);
  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
  --color-sidebar-accent: var(--sidebar-accent);
  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
  --color-sidebar-primary: var(--sidebar-primary);
  --color-sidebar-foreground: var(--sidebar-foreground);
  --color-sidebar: var(--sidebar);
  --color-chart-5: var(--chart-5);
  --color-chart-4: var(--chart-4);
  --color-chart-3: var(--chart-3);
  --color-chart-2: var(--chart-2);
  --color-chart-1: var(--chart-1);
  --color-ring: var(--ring);
  --color-input: var(--input);
  --color-border: var(--border);
  --color-destructive: var(--destructive);
  --color-accent-foreground: var(--accent-foreground);
  --color-accent: var(--accent);
  --color-muted-foreground: var(--muted-foreground);
  --color-muted: var(--muted);
  --color-secondary-foreground: var(--secondary-foreground);
  --color-secondary: var(--secondary);
  --color-primary-foreground: var(--primary-foreground);
  --color-primary: var(--primary);
  --color-popover-foreground: var(--popover-foreground);
  --color-popover: var(--popover);
  --color-card-foreground: var(--card-foreground);
  --color-card: var(--card);
  --color-foreground: var(--foreground);
  --color-background: var(--background);
  --color-stamp: var(--stamp);
  --color-ink: var(--ink);
  --color-ink-soft: var(--ink-soft);
  --radius-sm: calc(var(--radius) * 0.6);
  --radius-md: calc(var(--radius) * 0.8);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) * 1.4);
}

:root {
  /* Aged paper / Soviet document palette — warm, low-contrast, sepia ink */
  --background: oklch(0.9 0.028 78);
  --foreground: oklch(0.32 0.03 52);
  --card: oklch(0.945 0.024 84);
  --card-foreground: oklch(0.32 0.03 52);
  --popover: oklch(0.945 0.024 84);
  --popover-foreground: oklch(0.32 0.03 52);
  --primary: oklch(0.47 0.16 30);
  --primary-foreground: oklch(0.95 0.022 88);
  --secondary: oklch(0.86 0.03 78);
  --secondary-foreground: oklch(0.34 0.03 52);
  --muted: oklch(0.87 0.026 80);
  --muted-foreground: oklch(0.5 0.028 56);
  --accent: oklch(0.47 0.16 30);
  --accent-foreground: oklch(0.95 0.022 88);
  --destructive: oklch(0.47 0.16 30);
  --border: oklch(0.56 0.035 58 / 0.45);
  --input: oklch(0.56 0.035 58 / 0.45);
  --ring: oklch(0.47 0.16 30);
  --stamp: oklch(0.46 0.17 30);
  --ink: oklch(0.32 0.03 52);
  --ink-soft: oklch(0.5 0.028 56);
  --chart-1: oklch(0.47 0.16 30);
  --chart-2: oklch(0.5 0.02 60);
  --chart-3: oklch(0.4 0.02 55);
  --chart-4: oklch(0.6 0.05 80);
  --chart-5: oklch(0.3 0.02 55);
  --radius: 0.125rem;
  --sidebar: oklch(0.9 0.022 84);
  --sidebar-foreground: oklch(0.32 0.03 52);
  --sidebar-primary: oklch(0.47 0.16 30);
  --sidebar-primary-foreground: oklch(0.95 0.022 88);
  --sidebar-accent: oklch(0.86 0.03 78);
  --sidebar-accent-foreground: oklch(0.34 0.03 52);
  --sidebar-border: oklch(0.56 0.035 58 / 0.45);
  --sidebar-ring: oklch(0.47 0.16 30);
}

@layer base {
  * {
    @apply border-border;
  }
  body {
    @apply bg-background text-foreground;
    /* layered paper: faint ledger rules + grain + warm vignette */
    background-image:
      /* vignette */
      radial-gradient(
        130% 120% at 50% 0%,
        transparent 55%,
        oklch(0.3 0.04 52 / 0.12) 100%
      ),
      /* fine grain */
      radial-gradient(oklch(0.3 0.03 52 / 0.05) 1px, transparent 1.4px),
      radial-gradient(oklch(0.3 0.03 52 / 0.04) 1px, transparent 1.4px),
      /* warm base wash */
      linear-gradient(180deg, oklch(0.91 0.03 80), oklch(0.88 0.03 76));
    background-size: 100% 100%, 16px 16px, 22px 22px, 100% 100%;
    background-position: 0 0, 0 0, 8px 11px, 0 0;
    background-attachment: fixed;
  }
  html {
    @apply font-mono;
  }
}

@layer utilities {
  .font-heading {
    font-family: var(--font-heading);
  }

  /* ---- Paper sheet: the core surface, replaces hard black rectangles ---- */
  .paper {
    position: relative;
    background-color: var(--card);
    background-image:
      linear-gradient(
        oklch(0.5 0.03 56 / 0.05) 1px,
        transparent 1px
      ),
      radial-gradient(oklch(0.3 0.03 52 / 0.04) 1px, transparent 1.3px);
    background-size: 100% 30px, 18px 18px;
    border: 1px solid oklch(0.5 0.04 56 / 0.35);
    box-shadow:
      0 1px 0 oklch(1 0 0 / 0.4) inset,
      0 18px 40px -24px oklch(0.25 0.04 52 / 0.55),
      0 2px 6px -3px oklch(0.25 0.04 52 / 0.3);
  }
  /* darker "cover/file" sheet */
  .paper-strong {
    background-color: oklch(0.5 0.04 56 / 0.06);
  }

  /* tape strip for pinning sheets */
  .tape {
    position: absolute;
    height: 1.6rem;
    width: 6.5rem;
    background: oklch(0.78 0.06 92 / 0.55);
    box-shadow: 0 1px 4px oklch(0.25 0.04 52 / 0.25);
    backdrop-filter: blur(0.5px);
  }

  /* ---- Document divider rules (replace border-b-2 black) ---- */
  .rule {
    border: 0;
    border-top: 1px solid oklch(0.45 0.04 56 / 0.5);
    box-shadow: 0 3px 0 -2px oklch(0.45 0.04 56 / 0.5);
  }
  .rule-red {
    border-top-color: var(--primary);
    box-shadow: 0 3px 0 -2px var(--primary);
  }

  /* ---- Classification rubber stamp: rotated, distressed, translucent ---- */
  .stamp {
    --c: var(--stamp);
    display: inline-flex;
    align-items: center;
    border: 2.5px solid var(--c);
    color: var(--c);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    border-radius: 3px;
    box-shadow: inset 0 0 0 1.5px var(--c);
    opacity: 0.78;
    mix-blend-mode: multiply;
    /* worn ink texture */
    -webkit-mask-image: radial-gradient(
      oklch(0 0 0) 60%,
      transparent 62%
    ),
      url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='40'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1.4 1.1'/%3E%3C/filter%3E%3Crect width='80' height='40' filter='url(%23n)'/%3E%3C/svg%3E");
    -webkit-mask-composite: source-over;
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='40'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1.4 1.1'/%3E%3C/filter%3E%3Crect width='80' height='40' filter='url(%23n)'/%3E%3C/svg%3E");
    mask-mode: luminance;
  }
  .stamp-skew {
    transform: rotate(-7deg);
  }
  .stamp-ink {
    --c: var(--ink-soft);
  }

  /* big translucent overlay stamp */
  .stamp-overlay {
    color: var(--stamp);
    border: 4px solid var(--stamp);
    opacity: 0.22;
    mix-blend-mode: multiply;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.12em;
    border-radius: 6px;
  }

  /* redacted bar with toner-bleed edges */
  .redacted {
    background: var(--ink);
    color: transparent;
    user-select: none;
    border-radius: 1px;
    box-shadow: 0 0 1px 1px oklch(0.3 0.03 52 / 0.4);
  }

  /* ledger-style top banner */
  .banner-classified {
    background:
      repeating-linear-gradient(
        45deg,
        oklch(0.42 0.16 30),
        oklch(0.42 0.16 30) 14px,
        oklch(0.38 0.15 30) 14px,
        oklch(0.38 0.15 30) 28px
      );
    color: var(--primary-foreground);
  }
}