/* Tailwind CSS v4 entry point (compiled by Trunk's `tailwind-css` pipeline).
 *
 * This token layer is the single source of truth for the UI theme:
 * typography scale, the 4px spacing grid, one accent family, semantic
 * danger/success pairs, and dark-friendly surface/ink tokens. Wave 4
 * components consume these tokens only - no ad-hoc hex values. */

@import "tailwindcss";

/* Explicit sources keep content detection deterministic regardless of the
 * working directory Trunk invokes the Tailwind CLI from. */
@source "../index.html";
@source "../src";

/* ------------------------------------------------------------------ */
/* Semantic surface tokens: dark is the product default. Light is an    */
/* explicit `:root[data-theme="light"]` override; there is deliberately */
/* no `prefers-color-scheme` query - `bootstrap.js` writes the data     */
/* attribute from localStorage (default `dark`) before the app mounts.  */
/* ------------------------------------------------------------------ */

:root {
  color-scheme: dark;

  --ui-canvas: oklch(0.165 0.012 255);
  --ui-raised: oklch(0.205 0.014 255);
  --ui-sunken: oklch(0.14 0.011 255);
  --ui-ink: oklch(0.955 0.004 255);
  --ui-ink-muted: oklch(0.705 0.014 255);
  --ui-line: oklch(0.3 0.014 255);
  --ui-line-strong: oklch(0.4 0.016 255);
  --ui-accent-ink: oklch(0.8 0.1 210);

  /* Dark action pair: dark ink on a bright accent stays high-contrast. */
  --ui-btn-bg: oklch(0.845 0.09 210);
  --ui-btn-bg-hover: oklch(0.9 0.065 210);
  --ui-btn-ink: oklch(0.24 0.045 210);

  /* Status colors: every pair is used with a glyph and text, never alone. */
  --ui-danger: oklch(0.808 0.114 19.6);
  --ui-danger-surface: oklch(0.258 0.092 26);
  --ui-danger-line: oklch(0.396 0.141 25.7);
  --ui-success: oklch(0.871 0.15 154.4);
  --ui-success-surface: oklch(0.266 0.065 152.9);
  --ui-success-line: oklch(0.448 0.119 151.3);

  --ui-accent-soft: oklch(0.24 0.045 210);
  --ui-accent-soft-ink: oklch(0.9 0.065 210);
  --ui-focus: oklch(0.845 0.09 210);
}

/* Light override: the only writer is the header `ThemeToggle` (and the
 * pre-mount init in `bootstrap.js`). Higher specificity than `:root`. */
:root[data-theme="light"] {
  color-scheme: light;

  --ui-canvas: oklch(0.981 0.004 255);
  --ui-raised: oklch(1 0 0);
  --ui-sunken: oklch(0.955 0.005 255);
  --ui-ink: oklch(0.235 0.02 255);
  --ui-ink-muted: oklch(0.5 0.018 255);
  --ui-line: oklch(0.905 0.006 255);
  --ui-line-strong: oklch(0.835 0.009 255);
  --ui-accent-ink: oklch(0.47 0.105 210);

  /* Action pair: white on accent-700 clears AA (5.3:1); hover darkens. */
  --ui-btn-bg: oklch(0.47 0.105 210);
  --ui-btn-bg-hover: oklch(0.4 0.085 210);
  --ui-btn-ink: oklch(1 0 0);

  --ui-danger: oklch(0.505 0.17 27.5);
  --ui-danger-surface: oklch(0.971 0.013 17.4);
  --ui-danger-line: oklch(0.885 0.062 18.3);
  --ui-success: oklch(0.527 0.154 150);
  --ui-success-surface: oklch(0.982 0.018 155.8);
  --ui-success-line: oklch(0.925 0.084 156);

  --ui-accent-soft: oklch(0.972 0.018 210);
  --ui-accent-soft-ink: oklch(0.47 0.105 210);
  --ui-focus: oklch(0.47 0.105 210);
}

/* `inline` keeps utilities pointing at the live custom properties, so the
 * `data-theme` override above wins without a rebuild or a `.dark` class. */
@theme inline {
  --color-canvas: var(--ui-canvas);
  --color-raised: var(--ui-raised);
  --color-sunken: var(--ui-sunken);
  --color-ink: var(--ui-ink);
  --color-muted: var(--ui-ink-muted);
  --color-line: var(--ui-line);
  --color-line-strong: var(--ui-line-strong);
  --color-accent-ink: var(--ui-accent-ink);
  --color-accent-soft: var(--ui-accent-soft);
  --color-accent-soft-ink: var(--ui-accent-soft-ink);
  --color-btn: var(--ui-btn-bg);
  --color-btn-hover: var(--ui-btn-bg-hover);
  --color-btn-ink: var(--ui-btn-ink);
  --color-danger: var(--ui-danger);
  --color-danger-surface: var(--ui-danger-surface);
  --color-danger-line: var(--ui-danger-line);
  --color-success: var(--ui-success);
  --color-success-surface: var(--ui-success-surface);
  --color-success-line: var(--ui-success-line);
}

@theme {
  /* Spacing: explicit 4px grid (Tailwind's default, pinned here on purpose). */
  --spacing: 0.25rem;

  /* Type: system-native stacks only - no CDN fonts (CSP-friendly, offline-safe). */
  --font-sans: "Avenir Next", "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;

  /* Typography scale beyond Tailwind's defaults. */
  --text-display: 2.75rem;
  --text-display--line-height: 1.08;
  --text-display--letter-spacing: -0.03em;
  --text-title: 1.625rem;
  --text-title--line-height: 1.2;
  --text-title--letter-spacing: -0.02em;

  /* One accent family: signal cyan. */
  --color-accent-50: oklch(0.972 0.018 210);
  --color-accent-100: oklch(0.945 0.038 210);
  --color-accent-200: oklch(0.9 0.065 210);
  --color-accent-300: oklch(0.845 0.09 210);
  --color-accent-400: oklch(0.775 0.115 210);
  --color-accent-500: oklch(0.7 0.13 210);
  --color-accent-600: oklch(0.6 0.125 210);
  --color-accent-700: oklch(0.47 0.105 210);
  --color-accent-800: oklch(0.4 0.085 210);
  --color-accent-900: oklch(0.33 0.065 210);
  --color-accent-950: oklch(0.24 0.045 210);

  /* Shape and elevation. */
  --radius-card: 0.875rem;
  --shadow-card:
    0 1px 2px oklch(0.2 0.02 255 / 0.06),
    0 12px 32px -16px oklch(0.2 0.02 255 / 0.22);
}

@layer base {
  html {
    -webkit-text-size-adjust: 100%;
  }

  @media (prefers-reduced-motion: no-preference) {
    html {
      scroll-behavior: smooth;
    }
  }

  body {
    background-color: var(--color-canvas);
    color: var(--color-ink);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  :focus-visible {
    outline: 2px solid var(--ui-focus);
    outline-offset: 2px;
  }

  ::selection {
    background-color: var(--color-accent-800);
    color: var(--color-accent-50);
  }

  :root[data-theme="light"] ::selection {
    background-color: var(--color-accent-200);
    color: var(--color-accent-950);
  }
}