/* ============================================================
   epurejs.dev — blueprint stylesheet
   An independent site in the épure family: same type system,
   hairline-and-ink discipline — on cool stone paper (the proof
   bench). Near-achromatic gray-clay system with one sanguine
   annotation mark. The affordance rules in DESIGN.md are
   load-bearing: color cannot signal function here.
   ============================================================ */

@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 400; font-display: swap; src: url("./fonts/ibm-plex-sans-400.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 500; font-display: swap; src: url("./fonts/ibm-plex-sans-500.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 600; font-display: swap; src: url("./fonts/ibm-plex-sans-600.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("./fonts/ibm-plex-mono-400.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("./fonts/ibm-plex-mono-500.woff2") format("woff2"); }

/* ---------- tokens ---------- */
:root {
  /* stone bones — the proof bench, coolest stock of the family */
  --paper: #f2f1ec;   /* stone — cooler than épure #f7f5f1, faint olive undertone */
  --card: #faf9f5;    /* code card, feature examples */
  --ink: #1d1a14;
  --muted: #5c5544;
  --faint: #8d8371;
  --line: #d9d7cd;    /* hairlines cooled to sit on stone */
  --shade: #e6e4dc;   /* recessed panels — reads recessed, not highlighted */

  /* clay system — near-achromatic; the four affordance rules in
     DESIGN.md are load-bearing: color cannot signal function here */
  --clay: #5a554c;       /* AREAS only: buttons, tag grounds, dictionary rule — white 7.4:1 */
  --clay-deep: #3f3b34;  /* hover / active */
  --clay-soft: #eeebe2;  /* slip — tint fills (lifted from #e9e6de: spec value collided with --shade) */
  --clay-ink: #47433c;   /* text on --clay-soft fills; code values */
  --mark: #b0402a;       /* sanguine — ANNOTATION ONLY: logo crosshair, PROOF stamp
                            border, active-nav tick. Never links, buttons, hovers,
                            or pass/fail. 5.2:1 on paper — holds for thin strokes */
  --mark-dim: #a68c86;    /* light sanguine — functions */

  /* the bench's two metals — code panes are the one place this site
     speaks in hue. Affordance rules untouched: never links, buttons,
     hovers, or state — these two colors exist only inside <pre>. */
  --steel: #3d566b;      /* instrument steel — code keywords. 7.3:1 on card */
  --verdigris: #4ea188;  /* patina — strings & measured values. 6.7:1 on card */
  /* pane-chip grounds — four washed workshop materials, one per pane, same
     light muted register with ink text (≈6.8:1). Toggle AREAS only. */
  --chip-feature: #98a4a0; /* washed patina — FEATURE (gherkin) */
  --chip-steps: #ada094;   /* washed bronze — STEPS (the typed side) */
  --chip-ts: #9aa7b4;      /* washed steel — TS */
  --chip-res: #b2b0b3;     /* washed porphyry — RES (not ReScript red:
                              red is annotation/failure here) */

  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "tnum";
}
h1, h2, h3 { margin: 0; text-wrap: balance; }
p { margin: 0; }
figure { margin: 0; }
a { color: inherit; }
::selection { background: var(--clay-soft); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* small-caps mono label */
.k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding-left: clamp(20px, 4vw, 36px);
  padding-right: clamp(20px, 4vw, 36px);
}

/* ---------- header ---------- */
.top {
  border-bottom: 1px solid var(--line);
}
.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  padding-bottom: 20px;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  font-weight: 600;
  font-size: 20px;
  letter-spacing: 0.01em;
}
.wordmark svg { display: block; color: var(--mark); }
.nav { display: flex; gap: clamp(14px, 3vw, 26px); }
.nav a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 4px 0;
  /* every link is underlined, always (affordance rule 2) */
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}
.nav a:hover {
  color: var(--ink);
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px; /* hover changes lightness AND form (rule 3) */
}
.nav a[aria-current="page"] {
  color: var(--ink);
  /* sanguine tick — annotation: marks the current page (rule 4) */
  text-decoration-color: var(--mark);
  text-decoration-thickness: 2px;
}

/* ---------- sections ---------- */
section { padding-top: clamp(52px, 8vw, 88px); padding-bottom: clamp(52px, 8vw, 88px); }
section + section { border-top: 1px solid var(--line); }

.sec-head h2 { font-size: clamp(23px, 3.2vw, 30px); font-weight: 600; letter-spacing: -0.01em; }
.sec-lead { max-width: 60ch; margin-top: 12px; color: var(--muted); font-size: 16.5px; }
.sec-head { margin-bottom: 0; }

/* ---------- hero ---------- */
.hero { overflow: clip; }
.hero .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(32px, 5vw, 60px);
  align-items: center;
}
.eyerow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-bottom: 20px;
}
.stamp {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clay-ink);
  border: 1.5px solid var(--mark); /* sanguine stamp border — annotation (rule 4) */
  padding: 3px 9px;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}
.eyebrow .sep { color: var(--faint); padding: 0 6px; }
.hero h1 {
  font-size: clamp(34px, 5.2vw, 52px);
  line-height: 1.06;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.hero .lead {
  margin-top: 20px;
  max-width: 50ch;
  color: var(--muted);
  font-size: 17px;
}
.lead code { font-family: var(--mono); font-size: 0.92em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 12px 22px;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn:hover { background: var(--clay-soft); } /* form change, not color-only (rule 3) */
.btn.solid {
  background: var(--clay);
  border-color: var(--clay);
  color: #fff; /* 7.4:1 */
}
.btn.solid:hover,
.btn.solid:active {
  background: var(--clay-deep);
  border-color: var(--clay-deep);
  color: #fff;
}

/* dictionary entry */
.defcard {
  margin-top: 34px;
  max-width: 52ch;
  padding: 15px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay); /* the dictionary block's rule — a clay area (rule 1) */
  background: var(--card);
  font-size: 14.5px;
  color: var(--muted);
}
.defcard .term { font-family: var(--mono); font-weight: 500; color: var(--ink); }
.defcard .ipa { font-family: var(--mono); color: var(--faint); }
.defcard .gram { font-style: italic; color: var(--faint); }

/* ---------- code figure ---------- */
.codefig {
  border: 1.5px solid var(--ink);
  background: var(--card);
}
.codebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
}
.codebar .figlabel { color: var(--faint); }
.langswitch, .viewswitch { display: inline-flex; border: 1px solid var(--line); }
.langswitch button, .viewswitch button {
  appearance: none;
  border: 0;
  margin: 0;
  cursor: pointer;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 12px;
}
.langswitch button + button, .viewswitch button + button { border-left: 1px solid var(--line); }
/* pressed pane — each pane owns a washed material, so the fill alone names
   what is showing: patina = feature, bronze = steps, steel = TS, porphyry
   = RES. Clay stays the ground for real buttons and tags. */
.langswitch button[aria-pressed="true"], .viewswitch button[aria-pressed="true"] { color: var(--ink); }
.langswitch button[data-lang="steps"][aria-pressed="true"],
.viewswitch button[data-view="steps"][aria-pressed="true"] { background: var(--chip-steps); }
.langswitch button[data-lang="feature"][aria-pressed="true"],
.viewswitch button[data-view="feature"][aria-pressed="true"] { background: var(--chip-feature); }
pre.code {
  margin: 0;
  padding: 20px 22px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink);
}
.codefig[data-lang="feature"] .code-steps { display: none; }
.codefig[data-lang="steps"] .code-feature { display: none; }
.codefoot {
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.codefoot .ps1 { color: var(--faint); }

/* hand-set syntax tokens — steel keywords, verdigris measured values */
.tk { color: var(--steel); }                          /* keyword — instrument steel */
.ts { color: var(--verdigris); font-weight: 500; }    /* string, measured value — patina */
.tc { color: var(--faint); font-style: italic; }      /* comment */
.tf { font-weight: 500; }                             /* call */

/* ---------- the wing compass at the card corner ---------- */
.code-slot { position: relative; }
.code-slot .codefig { position: relative; z-index: 1; }
.compass-mark {
  position: absolute;
  right: -140px;
  bottom: -90px;
  width: 260px;
  height: auto;
  color: var(--clay);
  opacity: 0.35;
  z-index: 0;
  pointer-events: none;
}
@media (max-width: 920px) {
  .compass-mark { display: none; }
}

/* ---------- value propositions ---------- */
.props {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin-top: clamp(28px, 4vw, 44px);
}
.prop {
  padding: 26px 26px 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.prop:hover { background: var(--card); }
.prop .pid {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--muted); /* thin element — no clay, no mark (rule 1) */
}
.prop .glyph { margin: 18px 0 14px; color: var(--muted); }
.prop:hover .glyph { color: var(--ink); }
.prop .glyph svg { display: block; }
.prop h3 { font-size: 17.5px; font-weight: 600; margin-bottom: 8px; }
.prop p { font-size: 14.5px; color: var(--muted); max-width: 44ch; }

/* ---------- bridge to épure ---------- */
.bridge {
  position: relative;
  border: 1.5px solid var(--ink);
  background: var(--card);
  padding: 24px 28px;
  display: flex;
  align-items: baseline;
  gap: 24px;
}
.bridge .k {
  /* the PROOF stamp — sanguine border, clay-ink text (rule 4) */
  color: var(--clay-ink);
  white-space: nowrap;
  font-weight: 500;
  border: 1.5px solid var(--mark);
  padding: 3px 9px;
}
.bridge p { font-size: 15px; color: var(--muted); max-width: 62ch; }
.bridge p strong { color: var(--ink); font-weight: 600; }
.bridge-link {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.bridge-link:hover {
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px;
  background: var(--clay-soft);
}
.bridge-link .arrow { color: var(--muted); }

/* registration crosshairs — the épure stitch */
.reg { position: absolute; width: 22px; height: 22px; pointer-events: none; }
.reg::before, .reg::after { content: ""; position: absolute; background: var(--ink); }
.reg::before { left: 50%; top: 0; width: 1px; height: 100%; }
.reg::after { top: 50%; left: 0; height: 1px; width: 100%; }
.reg.tl { top: -12px; left: -12px; }
.reg.br { bottom: -12px; right: -12px; }

/* ---------- footer ---------- */
.foot { border-top: 1.5px solid var(--ink); background: var(--paper); }
.foot .wrap {
  display: grid;
  grid-template-columns: repeat(5, auto);
  justify-content: space-between;
  gap: 12px 28px;
  padding-top: 18px;
  padding-bottom: 22px;
}
.fcell { min-width: 0; }
.fcell .lbl {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 3px;
}
.fcell .val { font-family: var(--mono); font-size: 12.5px; color: var(--ink); overflow-wrap: anywhere; }
.fcell .val a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.fcell .val a:hover {
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px;
  background: var(--clay-soft);
}

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); }
  .props { grid-template-columns: 1fr 1fr; }
  .bridge { flex-wrap: wrap; }
  .bridge-link { margin-left: 0; }
}
@media (max-width: 680px) {
  .props { grid-template-columns: 1fr; }
  .foot .wrap { grid-template-columns: 1fr 1fr; }
  .nav a:not([href*="github"]):not([aria-current]) { display: none; }
}

/* ============================================================
   Docs & API pages — generated by the docs build.
   Same bones as the landing; every link underlined (rule 2),
   clay in areas only (rule 1), sanguine only as the active-nav
   tick (rule 4), code set in the bench's two metals (steel,
   verdigris) — hue that lives only inside the panes.
   ============================================================ */

/* skip link */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 10px 18px;
}
.skip:focus { left: 0; }

/* prose links — ink, underlined, hover thickens and fills (rules 2, 3) */
.standfirst a,
.chapter p.body a,
.entry .prose > p a,
.entry .prose > ul a,
.entry .prose > ol a,
.xref a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.standfirst a:hover,
.chapter p.body a:hover,
.entry .prose > p a:hover,
.entry .prose > ul a:hover,
.entry .prose > ol a:hover,
.xref a:hover {
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px;
  background: var(--clay-soft);
}

/* ---------- docs page ---------- */
.docs-head {
  padding-top: clamp(40px, 6vw, 64px);
  padding-bottom: clamp(28px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
}
.docs-head h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 600; letter-spacing: -0.015em; }
.docs-head .eyebrow { margin-bottom: 14px; }
.standfirst {
  margin-top: 12px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 16.5px;
}

.docs-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
  padding-top: clamp(32px, 5vw, 52px);
  padding-bottom: clamp(52px, 8vw, 88px);
}

.toc { position: sticky; top: 24px; }
.toc .idx-group {
  color: var(--faint);
  margin: 0 0 6px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--line);
}
.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: ch;
}
.toc li { counter-increment: ch; }
.toc a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  padding: 5px 0 5px 10px;
  border-left: 2px solid transparent;
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.toc a::before {
  content: counter(ch, decimal-leading-zero);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--faint);
}
.toc a:hover {
  color: var(--ink);
  border-left-color: var(--ink);
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px;
}
.toc a[aria-current="true"] {
  color: var(--ink);
  /* sanguine tick — the active-nav annotation (rule 4) */
  border-left-color: var(--mark);
}
.toc a[aria-current="true"]::before { color: var(--clay-ink); }

.chapters { max-width: 70ch; }
.chapter { scroll-margin-top: 24px; }
.chapter + .chapter {
  margin-top: clamp(44px, 6vw, 64px);
  padding-top: clamp(44px, 6vw, 64px);
  border-top: 1px solid var(--line);
}
.ch-kicker {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}
.ch-kicker .no {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--muted); /* thin element — no clay, no mark (rule 1) */
  letter-spacing: 0.14em;
}
.ch-kicker .rule { flex: 1; height: 1px; background: var(--line); }
.chapter h2 { font-size: clamp(22px, 3vw, 27px); font-weight: 600; letter-spacing: -0.01em; }
.chapter h2 a,
.entry-head h2 a {
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}
.chapter h2 a:hover,
.entry-head h2 a:hover {
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px;
}
.chapter h2 a:hover::after,
.entry-head h2 a:hover::after { content: " #"; color: var(--line); }
.chapter h3 { font-size: 17.5px; font-weight: 600; margin-top: 34px; }

.chapter p.body { margin-top: 16px; font-size: 15.5px; color: var(--muted); }
.chapter p.body strong { color: var(--ink); font-weight: 600; }
.chapter p.body code, .story code, .pro code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--shade);
  border: 1px solid var(--line);
  padding: 1px 5px;
}

.example {
  margin-top: 22px;
  border: 1px solid var(--line);
  background: var(--card);
}
.example .exbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 8px 8px 16px;
  border-bottom: 1px solid var(--line);
}
.example .exbar .k { color: var(--faint); }
.example pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink);
}

.story {
  margin-top: 22px;
  padding: 2px 0 2px 20px;
  border-left: 2px solid var(--line);
  font-style: italic;
  font-size: 15px;
  color: var(--muted);
}
.story .k {
  display: block;
  font-style: normal;
  color: var(--faint);
  margin-bottom: 4px;
}

.pro {
  margin-top: 22px;
  padding: 14px 18px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay); /* a clay area, like the defcard rule (rule 1) */
  background: var(--card);
  font-size: 14.5px;
  color: var(--muted);
}
.pro .k { display: block; color: var(--clay-ink); font-weight: 500; margin-bottom: 6px; }

.xref {
  margin-top: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}
.xref a {
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 12px;
}
.xref .arrow { color: var(--muted); }

/* ---------- API reference page ---------- */
.api-head { padding-top: clamp(40px, 6vw, 64px); padding-bottom: clamp(28px, 4vw, 40px); border-bottom: 1px solid var(--line); }
.api-head h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 600; letter-spacing: -0.015em; }
.api-head .eyebrow { margin-bottom: 14px; }
.api-head .sec-lead { margin-top: 10px; }

.api-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
  padding-top: clamp(32px, 5vw, 52px);
  padding-bottom: clamp(52px, 8vw, 88px);
}
.api-index {
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
}
.api-index .idx-group {
  color: var(--faint);
  margin: 0 0 6px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--line);
}
.api-index .idx-group:not(:first-child) { margin-top: 22px; }
.api-index a {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  padding: 4px 0 4px 10px;
  border-left: 2px solid transparent;
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.api-index a:hover {
  color: var(--ink);
  border-left-color: var(--ink);
  text-decoration-color: var(--ink);
  text-decoration-thickness: 2px;
}

/* entry — manual-page pattern */
.entry { scroll-margin-top: 24px; }
.entry + .entry { margin-top: clamp(44px, 6vw, 64px); padding-top: clamp(44px, 6vw, 64px); border-top: 1px solid var(--line); }
.entry-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 10px;
}
.entry-head h2 {
  font-family: var(--mono);
  font-size: clamp(19px, 2.6vw, 23px);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.tags { display: flex; gap: 8px; }
/* tag grounds — clay areas (rule 1); hierarchy by darkness, not hue */
.tags span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--clay-ink);
  border: 1px solid var(--line);
  background: var(--clay-soft);
  padding: 3px 8px;
}
.tags span.core {
  background: var(--clay);
  border-color: var(--clay);
  color: #fff; /* 7.4:1 */
}
.entry .summary { font-size: 16.5px; color: var(--ink); max-width: 60ch; }
.sig-wrap[data-pair] {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.sig-wrap[data-pair] > pre.sig {
  margin-top: 0;
}
pre.sig {
  margin: 18px 0 0;
  padding: 14px 18px;
  overflow-x: auto;
  background: var(--shade);
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay); /* clay area (rule 1) */
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.6;
  white-space: pre-wrap;
}
.entry .prose > p, .entry .prose > ul, .entry .prose > ol { margin-top: 18px; font-size: 15px; color: var(--muted); max-width: 66ch; }
.entry .prose > p code, .entry .prose > ul code, .entry .prose > ol code, .entry .summary code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--shade);
  border-radius: 2px;
  padding: 1px 5px;
}
.entry .ex { margin-top: 22px; border: 1px solid var(--line); background: var(--card); }
.entry .ex figcaption {
  padding: 8px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
}
.exbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* ---------- generated code blocks (Prism) ---------- */
pre[class^="language-"],
pre[class*=" language-"] {
  margin: 0;
  padding: 20px 22px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink);
}
.entry .ex pre.code,
.entry .ex[data-pair] > pre.language-typescript,
.entry .ex[data-pair] > pre.language-rescript,
.entry .ex[data-pair] > pre.language-res,
.entry .ex[data-view] > pre.language-gherkin,
.example > pre.code,
.example[data-pair] > pre.language-typescript,
.example[data-pair] > pre.language-rescript,
.example[data-pair] > pre.language-res {
  padding: 16px 18px;
}

/* Prism tokens — the bench's two metals on ink: steel keywords, verdigris
   values, punctuation stepped back so identifiers carry the line */
.token.keyword,
.token.builtin,
.token.class-name { color: var(--steel); }
.token.string,
.token.char,
.token.number,
.token.boolean,
.token.constant,
.token.attr-value { color: var(--verdigris); font-weight: 500; }
.token.comment,
.token.prolog,
.token.doctype { color: var(--faint); font-style: italic; }
.token.function,
.token.function-variable { font-weight: 500; color: var(--mark-dim) }
.token.operator,
.token.punctuation { color: var(--muted); }
/* Gherkin: Given/When/Then in steel (regular — atrule also catches the
   word that follows), Feature/Scenario labels steel, titles carry weight,
   example-table headers steel over verdigris cells */
.token.atrule { color: var(--steel); }
.token.important { color: var(--ink); font-weight: 600; }
.token.variable { color: var(--verdigris); font-weight: 500; }
.token.th { color: var(--steel); font-weight: 500; }
.token.tag { color: var(--faint); font-style: italic; }

/* ---------- ts | res toggle on paired examples ---------- */
.lang-toggle {
  appearance: none;
  border: 1px solid var(--line);
  margin: 0;
  cursor: pointer;
  background: transparent;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
}
.lang-toggle .lt {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1;
  padding: 4px 8px;
}
/* active pane — washed steel says TypeScript, washed porphyry says ReScript */
html[data-lang="ts"] .lang-toggle .lt-ts {
  background: var(--chip-ts);
  color: var(--ink);
}
html[data-lang="res"] .lang-toggle .lt-res {
  background: var(--chip-res);
  color: var(--ink);
}
html[data-lang="ts"] [data-pair] > pre.language-rescript,
html[data-lang="ts"] [data-pair] > pre.language-res {
  display: none;
}
html[data-lang="res"] [data-pair] > pre.language-typescript {
  display: none;
}
.sig-wrap[data-pair] > .lang-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
}

/* ---------- feature | steps toggle on contract figures ----------
   Independent of the language toggle: the view picks the pane, and
   inside the steps pane html[data-lang] still picks ts or res. */
.entry .ex[data-view="feature"] > pre.language-typescript,
.entry .ex[data-view="feature"] > pre.language-rescript,
.entry .ex[data-view="feature"] > pre.language-res,
.entry .ex[data-view="steps"] > pre.language-gherkin {
  display: none;
}

/* ---------- docs/api responsive ---------- */
@media (max-width: 820px) {
  .docs-layout { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .toc { position: static; }
  .toc ol { column-count: 2; column-gap: 24px; }
  .api-layout { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .api-index { position: static; flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: 2px 18px; }
  .api-index .idx-group { border-bottom: none; margin: 0; width: 100%; }
  .api-index .idx-group:not(:first-child) { margin-top: 10px; }
  .api-index a { padding-left: 0; border-left: none; }
}
@media (max-width: 680px) {
  .toc ol { column-count: 1; }
}

/* ---------- print / projection ---------- */
@media print {
  body { background: #fff; }
  .langswitch, .viewswitch, .lang-toggle, .cta-row, .compass-mark { display: none; }
  .codefig, .bridge, .example, .pro { break-inside: avoid; }
}