/* Hallmark · pre-emit critique: P4 H5 E4 S4 R5 V5
 * macrostructure: Index-First (13) · article view: Long Document (02)
 * theme: custom · vibe: "midnight moss paper, one reading lamp" · paper: oklch(16% 0.010 150) · accent: oklch(72% 0.130 150)
 * display: Noto Serif SC · body: Noto Sans SC · outlier: JetBrains Mono · axes: dark / roman-serif / chromatic-green
 * nav: N6 Newspaper masthead (knobs: issue-line=above, wordmark=2xl-serif, rule=double) · footer: Ft6 Letter close (signoff=roman, postscript=yes)
 * enrichment: none — typography only · motion: reveal-once · link-underline · button-press
 * studied: no · context: inferred (autonomous session; dark-theme preference from user memory) · v1.1.0
 * gates: slop 58/58 · contrast: pass (40–41) · nav/footer: pass (42–43) · honest: pass (46) ·
 * chrome: pass (47) · tokens: pass (48) · responsive: pass (34, 49, 50–55) · icons: pass (30)
 */

:root {
  /* — color · 夜稿：墨绿稿纸，一盏绿灯 — */
  --color-paper:    oklch(16% 0.010 150);
  --color-paper-2:  oklch(20% 0.012 150);
  --color-paper-3:  oklch(24% 0.013 150);
  --color-ink:      oklch(91% 0.010 140);
  --color-ink-2:    oklch(74% 0.012 145);
  --color-muted:    oklch(58% 0.014 145);
  --color-neutral:  oklch(44% 0.014 148);
  --color-rule:     oklch(30% 0.012 150);
  --color-rule-2:   oklch(25% 0.012 150);
  --color-accent:   oklch(72% 0.130 150);
  --color-accent-ink: oklch(20% 0.030 150);
  --color-focus:    oklch(76% 0.180 150);
  --color-error:    oklch(66% 0.190 25);
  --color-success:  var(--color-accent);
  --color-placeholder: oklch(66% 0.012 145);
  --color-scrim:    oklch(8% 0.010 150 / 70%);

  /* — fonts（系统栈，免 webfont 请求；大陆网络友好）— */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-outlier: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* — type scale · 1.25 major third — */
  --text-xs:   0.8rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-md:   1.25rem;
  --text-lg:   1.5625rem;
  --text-xl:   1.9531rem;
  --text-2xl:  2.4414rem;
  --text-3xl:  3.0518rem;
  --text-display: clamp(2.25rem, 5vw + 1rem, 3.75rem);

  /* — space · 4pt — */
  --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;

  /* — 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-micro: 120ms;
  --dur-short: 220ms;
  --dur-long: 420ms;

  /* — rules & radius — */
  --rule-hair: 1px;
  --radius-sm: 2px;
  --radius-md: 4px;

  /* — z — */
  --z-base: 1;
  --z-sticky: 200;
  --z-modal: 400;
  --z-toast: 500;

  /* — layout — */
  --page-gutter: clamp(1rem, 4vw, 1.5rem);
  --measure: 40em;
  color-scheme: dark;
}