/* Hallmark · macrostructure: Index-First · tone: technical/austere · theme: Cobalt · enrichment: none · nav: N9 · footer: Ft2 */
/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V5 · audience: approved study-group members · use: choose an approved workspace · tone: technical/austere */

:root {
  color-scheme: light dark;

  /* Cobalt palette — cool paper, quiet ink, one signal blue. */
  --color-paper: oklch(98% 0.008 250);
  --color-paper-2: oklch(95% 0.012 250);
  --color-paper-3: oklch(92% 0.016 250);
  --color-rule: oklch(84% 0.018 250);
  --color-rule-2: oklch(69% 0.022 250);
  --color-neutral: oklch(52% 0.018 250);
  --color-muted: oklch(42% 0.018 250);
  --color-ink-2: oklch(29% 0.016 250);
  --color-ink: oklch(18% 0.012 250);
  --color-accent: oklch(56% 0.20 256);
  --color-accent-soft: oklch(92% 0.045 256);
  --color-accent-ink: oklch(98% 0.008 250);
  --color-focus: oklch(47% 0.19 256);
  --color-error: oklch(50% 0.17 28);
  --color-success: oklch(46% 0.13 154);
  --color-warning: oklch(52% 0.14 78);
  --color-overlay: oklch(18% 0.012 250 / 0.56);
  --shadow-whisper: 0 1px 2px oklch(18% 0.012 250 / 0.08);

  --font-display: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Source Sans 3", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Code", "SFMono-Regular", monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.25rem;
  --text-lg: 1.5625rem;
  --text-xl: 1.9531rem;
  --text-2xl: 2.4414rem;
  --text-display: clamp(2.65rem, 5vw + 0.6rem, 5rem);
  --text-display-s: clamp(2.4rem, 4vw + 0.5rem, 4rem);

  --space-3xs: 0.125rem;
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-pill: 999px;

  --rule-hair: 1px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-micro: 120ms;
  --dur-short: 220ms;
  --dur-long: 420ms;

  --z-base: 1;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 400;
  --z-toast: 500;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-paper: oklch(15% 0.012 250);
    --color-paper-2: oklch(19% 0.016 250);
    --color-paper-3: oklch(23% 0.018 250);
    --color-rule: oklch(31% 0.018 250);
    --color-rule-2: oklch(48% 0.022 250);
    --color-neutral: oklch(66% 0.018 250);
    --color-muted: oklch(75% 0.016 250);
    --color-ink-2: oklch(87% 0.012 250);
    --color-ink: oklch(94% 0.008 250);
    --color-accent: oklch(69% 0.17 256);
    --color-accent-soft: oklch(28% 0.045 256);
    --color-accent-ink: oklch(16% 0.012 250);
    --color-focus: oklch(76% 0.15 256);
    --color-error: oklch(72% 0.14 28);
    --color-success: oklch(70% 0.12 154);
    --color-warning: oklch(77% 0.11 78);
    --color-overlay: oklch(4% 0.012 250 / 0.72);
    --shadow-whisper: 0 1px 2px oklch(4% 0.012 250 / 0.32);
  }
}