/* Hallmark · genre: editorial · theme: Travertine & Graphite · design-system: design.md · designed-as-app
 * pre-emit critique: P5 H5 E5 S5 R5 V4
 */
:root {
  /* Colour — Travertine & Graphite */
  --color-paper: oklch(97% 0.008 85);
  --color-paper-2: oklch(94% 0.01 80);
  --color-paper-3: oklch(90% 0.012 78);
  --color-ink: oklch(18% 0.012 60);
  --color-ink-2: oklch(42% 0.012 60);
  --color-ink-3: oklch(55% 0.01 60);
  --color-rule: oklch(88% 0.008 80);
  --color-rule-strong: oklch(78% 0.01 75);
  --color-accent: oklch(58% 0.09 65);
  --color-accent-ink: oklch(22% 0.04 60);
  --color-focus: oklch(45% 0.04 250);
  --color-success: oklch(62% 0.14 150);
  --color-danger: oklch(58% 0.18 25);
  --color-warning: oklch(72% 0.14 75);

  /* Dark bands (photo chrome, studio, CTA) */
  --color-ink-band: oklch(16% 0.01 60);
  --color-ink-band-2: oklch(22% 0.012 60);
  --color-paper-on-ink: oklch(97% 0.008 85);
  --color-muted-on-ink: oklch(72% 0.01 80);
  --color-rule-on-ink: oklch(32% 0.01 60);

  /* Typography */
  --font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;

  /* Type scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.25rem;
  --text-4xl: 3rem;
  --text-display-s: clamp(2rem, 5vw, 3.25rem);
  --text-display: clamp(2.75rem, 7vw, 5.5rem);
  --text-display-l: clamp(3.25rem, 10vw, 7.5rem);

  --leading-tight: 1.05;
  --leading-snug: 1.25;
  --leading-body: 1.65;
  --tracking-display: -0.035em;
  --tracking-label: 0.12em;

  /* Spacing — 4pt scale */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 7rem;

  /* Layout */
  --measure: 65ch;
  --content-width: 72rem;
  --content-wide: 90rem;
  --nav-height: 4.25rem;

  /* Radius — architectonic, not pill-default */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;

  /* Motion */
  --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-short: 160ms;
  --dur-mid: 280ms;
  --dur-long: 480ms;

  --rule: 1px solid var(--color-rule);
  --shadow-soft: 0 12px 40px oklch(18% 0.012 60 / 0.08);
}