/* Hallmark · genre: editorial · macrostructure: Specimen · theme: custom "Basalt and Lichen"
 * vibe: field-geology notebook, labelled samples, hand-numbered plates, basalt paper
 * paper oklch(21% 0.014 250) basalt · ink oklch(93% 0.012 90) limestone · accent oklch(82% 0.14 120) lichen
 * display Instrument Serif (roman) · body Hanken Grotesk · outlier DM Mono (labels, numerals)
 * axes: DARK / roman serif display-heavy / lichen yellow-green on slate
 * nav: N6 masthead with issue line, double rule · footer: Ft8 variant, static grade tape (no marquee) · enrichment: Tier B hand-built SVG plates
 * self-critique: no italic headings; no card grids (typographic rows + hairlines); no inline colours outside this block;
 * one accent; contrast checked ink/paper above 12:1, muted above 6:1, accent above 9:1; 320/375/414/768 fall back to one column.
 */
:root {
  color-scheme: dark;

  --color-paper:   oklch(21% 0.014 250);
  --color-paper-2: oklch(24.5% 0.016 250);
  --color-paper-3: oklch(29% 0.018 250);
  --color-rule:    oklch(37% 0.020 250);
  --color-rule-2:  oklch(52% 0.022 250);
  --color-ink:     oklch(93% 0.012 90);
  --color-ink-dim: oklch(84% 0.014 90);
  --color-muted:   oklch(73% 0.018 90);

  --color-accent:      oklch(82% 0.140 120);
  --color-accent-deep: oklch(72% 0.130 120);
  --color-accent-ink:  oklch(20% 0.030 120);
  --color-focus:       oklch(88% 0.150 120);

  /* specimen palette, used only by the drawings */
  --m-clay:    oklch(58% 0.050 45);
  --m-silt:    oklch(68% 0.040 80);
  --m-sand:    oklch(80% 0.075 88);
  --m-pebble:  oklch(70% 0.030 70);
  --m-granite: oklch(66% 0.050 25);
  --m-slate:   oklch(58% 0.045 245);
  --m-flint:   oklch(44% 0.015 250);
  --m-soil:    oklch(36% 0.040 60);
  --m-rock:    oklch(46% 0.020 250);
  --m-sky:     oklch(27% 0.020 250);
  --m-water:   oklch(56% 0.070 225);
  --m-cement:  oklch(72% 0.012 250);
  --m-leaf:    oklch(62% 0.100 140);
  --m-truck:   oklch(60% 0.060 60);

  --font-display: "Instrument Serif", ui-serif, Georgia, "Times New Roman", serif;
  --font-body:    "Hanken Grotesk", ui-sans-serif, "Segoe UI", system-ui, sans-serif;
  --font-mono:    "DM Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --weight-body: 400;

  --text-2xs:  0.75rem;
  --text-xs:   0.8125rem;
  --text-sm:   0.9375rem;
  --text-base: 1.0625rem;
  --text-md:   1.25rem;
  --text-lg:   1.625rem;
  --text-xl:   clamp(1.875rem, 1.4rem + 1.6vw, 2.5rem);
  --text-2xl:  clamp(2.25rem, 1.2rem + 4.4vw, 4.25rem);
  --text-display: clamp(2.75rem, 0.9rem + 7.6vw, 6.5rem);

  --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;
  --space-4xl: 9rem;

  --gutter: clamp(1rem, 4vw, 2rem);
  --label-col: 12rem;
  --rail-col: 17.5rem;
  --measure: 44rem;

  --rule-hair:  1px;
  --rule-thick: 2px;
  --radius-s: 2px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-short: 140ms;
  --dur-base: 260ms;
  --dur-long: 600ms;
}