/* GovSchema landing site — institutional / standards-body aesthetic.
   Restrained palette, self-hosted IBM Plex Sans + Mono (OFL), monospace for
   metadata and the brace wordmark. No frameworks. */

/* --------------------------------------------------------------------------
   Self-hosted webfonts — IBM Plex Sans + IBM Plex Mono (SIL OFL 1.1).
   Implements the GOV-19 type-token spec (docs/design/type-tokens.md); per the
   GOV-16 brand decision. Vendored by tools/build-fonts.mjs from @fontsource.
   License: assets/fonts/OFL.txt.

   - font-display: swap -> text paints immediately in the system fallback, then
     swaps to Plex on load (no FOIT; minimal CLS).
   - Two subsets per weight (latin / latin-ext) sharing a family, split by
     unicode-range (upstream Google/fontsource split, matched to the binaries):
     Basic-Latin pages fetch only `latin`; `latin-ext` loads on demand for
     multi-jurisdictional names (š ž č ł ő ř ț ğ…).
   - Weights per spec §3 (audited against styles.css, no faux-synthesis):
     Sans 400/500/600, Mono 400/600. Headings are pinned to 600 and .brand-mark
     to 600 (see rules below) so every weight resolves to a shipped face.
   -------------------------------------------------------------------------- */
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-400.woff2") format("woff2");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-500.woff2") format("woff2");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-600.woff2") format("woff2");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-400.woff2") format("woff2");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-600.woff2") format("woff2");
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-ext-400.woff2") format("woff2");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-ext-500.woff2") format("woff2");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-ext-600.woff2") format("woff2");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-ext-400.woff2") format("woff2");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-ext-600.woff2") format("woff2");
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

:root {
  --ink: #14181f;
  --body: #2b333d;
  --muted: #5b6573;
  --faint: #8a93a0;
  --line: #e4e7ec;
  --line-strong: #d2d7df;
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --navy: #163a6b;
  --navy-deep: #102a4d;
  --accent: #1f5fbf;
  --ok: #1d7a52;
  --ok-bg: #e6f3ec;
  --prog: #9a6a14;
  --prog-bg: #fbf0d9;
  --plan: #5b6573;
  --plan-bg: #eef0f3;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Spacing scale — 4px rhythm. Component-level gaps/padding/margins draw from
     these steps so density is systematic, not picked per component. Larger
     structural paddings (section/hero) compose from the section tokens below.
     Off-scale "tweener" values that remain in the sheet (10/14/18/20/22/26/28)
     are tracked for a future convergence pass; see DESIGN.md §2.3. */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  /* Section-level vertical rhythm (marketing blocks, hero). */
  --space-section: 72px;
  --space-section-sm: 52px;

  /* Focus ring — single source of truth for the :focus-visible affordance. */
  --focus-ring: 0 0 0 3px rgba(31, 95, 191, 0.45);

  --maxw: 1080px;
  --measure: 720px;
}

* { box-sizing: border-box; }

/* Smooth in-page scroll, but only for visitors who haven't asked for less
   motion (WCAG 2.3.3 / prefers-reduced-motion). */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* Reduced-motion: neutralize transitions/animations site-wide. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- focus-visible: one consistent keyboard-focus affordance (WCAG 2.4.7).
   Keyboard users get a visible ring; pointer users don't (focus-visible).
   Links use an outline that hugs the glyph; buttons/controls use the ring
   token so the indicator reads against both light and navy surfaces. */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}
.btn:focus-visible,
.version-select:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid transparent;
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}
/* On the navy CTA block, switch the ring to white for contrast. */
.block-cta .btn:focus-visible { box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.7); }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--body);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* Block faux-bold synthesis (GOV-19 §3 guardrail): any stray weight not in the
     shipped set fails loudly (thin) instead of silently faux-bolding. `style`
     stays enabled so the rare synthetic italic (.def-abbr, prose <em>) still
     works — we ship upright-only in v0.1. */
  font-synthesis: style;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--space-5); }
.measure { max-width: var(--measure); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* font-weight: 600 pins headings to a shipped Plex Sans weight — without it they
   inherit the UA-default bold (700) and the browser faux-bolds. (GOV-19 §3) */
h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; letter-spacing: -0.01em; font-weight: 600; }

.prose { color: var(--body); margin: 0 0 1.1em; }
.prose strong { color: var(--ink); }

/* ---- top nav ---- */
.topnav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.topnav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); font-weight: 600; }
.brand:hover { text-decoration: none; }
/* 600 (not 700): Mono ships 400/600 per GOV-19 §3; the interim text wordmark is
   superseded by the SVG mark in GOV-12. */
.brand-mark { font-family: var(--mono); color: var(--navy); font-weight: 600; letter-spacing: -1px; }
.brand-name { font-size: 1.05rem; letter-spacing: -0.01em; }
.topnav-links { display: flex; gap: 22px; }
.topnav-links a { color: var(--muted); font-size: 0.92rem; }
.topnav-links a:hover { color: var(--ink); text-decoration: none; }

/* ---- mobile nav disclosure (hidden on desktop; shown < 760px) ---- */
.nav-toggle {
  display: none;
  align-items: center; justify-content: center;
  width: 40px; height: 40px; padding: 0;
  background: transparent; color: var(--ink);
  border: 1px solid var(--line); border-radius: 6px;
  cursor: pointer;
}
.nav-toggle:hover { border-color: var(--line-strong); background: var(--bg-alt); }
.nav-toggle-bars { position: relative; }
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: ""; display: block;
  width: 18px; height: 2px; background: currentColor; border-radius: 2px;
  transition: transform 0.18s ease, background-color 0.18s ease;
}
.nav-toggle-bars::before { position: absolute; top: -6px; left: 0; }
.nav-toggle-bars::after { position: absolute; top: 6px; left: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

/* ---- hero ---- */
.hero {
  background:
    radial-gradient(1200px 400px at 80% -10%, rgba(31, 95, 191, 0.07), transparent 60%),
    linear-gradient(180deg, #fbfcfd 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}
.hero-inner { padding: 84px var(--space-5) 80px; max-width: 880px; }
.eyebrow {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.12em;
  color: var(--navy); text-transform: uppercase; margin: 0 0 18px;
}
.hero-title { font-size: clamp(2.1rem, 4.6vw, 3.2rem); margin: 0 0 22px; letter-spacing: -0.02em; }
.hero-lead { font-size: 1.22rem; color: var(--body); margin: 0 0 30px; max-width: 760px; }
.hero-meta { font-family: var(--mono); font-size: 0.82rem; color: var(--faint); margin: 26px 0 0; }

.actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 20px; border-radius: 6px; font-size: 0.96rem; font-weight: 500;
  border: 1px solid transparent; transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-deep); }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--line-strong); }
.btn-secondary:hover { border-color: var(--navy); color: var(--navy); }

/* ---- generic blocks ---- */
.block { padding: var(--space-section) 0; border-bottom: 1px solid var(--line); }
.block-alt { background: var(--bg-alt); }
.section-heading {
  display: flex; align-items: baseline; gap: 14px; font-size: 1.7rem; margin: 0 0 28px;
}
.section-number { font-family: var(--mono); font-size: 1.05rem; color: var(--navy); font-weight: 600; }

/* ---- definitions ---- */
.def-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin: 0; }
.def-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 28px; }
.def-term { font-size: 1.3rem; color: var(--ink); font-weight: 600; margin-bottom: var(--space-3); }
.def-abbr { font-family: var(--mono); font-size: 0.7rem; color: var(--faint); font-style: italic; font-weight: 400; vertical-align: middle; }
.def-body { margin: 0; }
.def-example {
  font-size: 0.92rem; color: var(--muted); border-left: 3px solid var(--line-strong);
  padding-left: 14px; margin: 14px 0 0;
}

/* ---- columns (dual audience) ---- */
.col-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.col-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 30px; }
.col-label {
  font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--navy); margin: 0 0 var(--space-4); padding-bottom: 14px; border-bottom: 1px solid var(--line);
}
.ticklist { list-style: none; margin: var(--space-4) 0 0; padding: 0; }
.ticklist li { position: relative; padding-left: 26px; margin: 9px 0; color: var(--body); font-size: 0.97rem; }
.ticklist li::before {
  content: ""; position: absolute; left: 0; top: 0.55em;
  width: 11px; height: 6px; border-left: 2px solid var(--ok); border-bottom: 2px solid var(--ok);
  transform: rotate(-45deg);
}

/* ---- steps ---- */
.steps { list-style: none; counter-reset: none; margin: 0; padding: 0; display: grid; gap: 20px; }
.step { display: flex; gap: 18px; align-items: flex-start; }
.step-num {
  flex: 0 0 auto; width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center; font-family: var(--mono); font-weight: 600;
  background: var(--navy); color: #fff; font-size: 0.95rem;
}
.step-title { font-size: 1.12rem; margin: var(--space-1) 0 6px; }
.step .prose { margin: 0; }

/* ---- status table ---- */
.status-table { width: 100%; border-collapse: collapse; margin-top: var(--space-5); font-size: 0.97rem; }
.status-table th, .status-table td { text-align: left; padding: 14px var(--space-3); border-bottom: 1px solid var(--line); }
.status-table th[scope="row"] { color: var(--ink); font-weight: 600; width: 38%; }
.status-table td { color: var(--muted); }
.status-cell { text-align: right; width: 1%; white-space: nowrap; }
.badge {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase;
  padding: var(--space-1) 9px; border-radius: 999px; font-weight: 600;
}
.badge-done { background: var(--ok-bg); color: var(--ok); }
.badge-in-progress { background: var(--prog-bg); color: var(--prog); }
.badge-planned { background: var(--plan-bg); color: var(--plan); }

/* ---- cta ---- */
.block-cta { background: var(--navy); border-bottom: none; }
.block-cta .section-heading, .block-cta .prose { color: #eef3fb; }
.block-cta .section-number { color: #9dc0f0; }
.block-cta .section-heading span:last-child { color: #fff; }
.block-cta .btn-secondary { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.block-cta .btn-secondary:hover { border-color: #fff; color: #fff; }
.block-cta .btn-primary { background: #fff; color: var(--navy); }
.block-cta .btn-primary:hover { background: #eef3fb; }

/* ---- footer ---- */
.site-footer { background: #0d1320; color: #aab4c2; padding: 56px 0 36px; font-size: 0.92rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 36px; }
.footer-about .brand-name { color: #fff; font-weight: 600; display: block; margin-bottom: var(--space-3); font-size: 1.05rem; }
.footer-disclaimer { color: #8893a3; max-width: 460px; line-height: 1.6; font-size: 0.88rem; }
.footer-col h4 { color: #fff; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; margin: 0 0 14px; font-family: var(--mono); font-weight: 600; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin: var(--space-2) 0; }
.footer-col a { color: #aab4c2; }
.footer-col a:hover { color: #fff; }
.footer-base { margin-top: 40px; padding-top: var(--space-5); border-top: 1px solid #1d2738; display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2); color: #6b7686; font-size: 0.85rem; }
.footer-base p { margin: 0; }

/* ============================================================================
   Documentation layout — sidebar IA + content column. Reuses the marketing
   tokens (palette, mono, lines, badges) so docs and marketing read as one
   system. Docs are a first-class product: dense, navigable, scannable.
   ============================================================================ */

.docs { background: var(--bg); }
.docs-grid {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
  padding-top: 40px;
  padding-bottom: 80px;
}

/* ---- docs sidebar ---- */
.docs-sidebar {
  position: sticky; top: 76px;
  align-self: start;
  max-height: calc(100vh - 96px);
  overflow-y: auto;
  padding-right: var(--space-2);
}
.docs-nav-group { margin-bottom: 26px; }
.docs-nav-title {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--faint); font-weight: 600;
  margin: 0 0 10px;
}
.docs-nav ul { list-style: none; margin: 0; padding: 0; }
.docs-nav li { margin: 0; }
.docs-nav a {
  display: block; padding: 6px var(--space-3); margin-left: -var(--space-3); border-radius: 6px;
  color: var(--muted); font-size: 0.92rem; line-height: 1.4;
  border-left: 2px solid transparent;
}
.docs-nav a:hover { color: var(--ink); background: var(--bg-alt); text-decoration: none; }
.docs-nav a.current {
  color: var(--navy); font-weight: 600;
  background: #eef3fb; border-left-color: var(--navy);
}

/* ---- docs content column ---- */
.docs-main { max-width: 760px; min-width: 0; }
.docs-main > * + * { margin-top: 28px; }

.breadcrumb ol {
  list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-2);
  margin: 0 0 18px; padding: 0;
  font-family: var(--mono); font-size: 0.78rem; color: var(--faint);
}
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: var(--space-2); color: var(--line-strong); }
.breadcrumb a { color: var(--muted); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

.doc-header { margin-bottom: var(--space-2); }
.doc-title { font-size: clamp(1.9rem, 3.4vw, 2.5rem); margin: var(--space-2) 0 0; letter-spacing: -0.02em; }
.doc-lead { font-size: 1.12rem; color: var(--body); margin: var(--space-4) 0 0; }
.doc-h2 {
  font-size: 1.35rem; margin: 0 0 14px; padding-top: var(--space-2);
  letter-spacing: -0.01em;
}
.doc-prose .prose:last-child, .fields .prose:last-child { margin-bottom: 0; }

/* ---- callout ---- */
.callout {
  border: 1px solid var(--line); border-left-width: 3px; border-radius: 8px;
  padding: var(--space-4) 20px; background: var(--bg-alt); font-size: 0.97rem;
}
.callout p { margin: 0 0 0.6em; color: var(--body); }
.callout p:last-child { margin-bottom: 0; }
.callout-title { font-weight: 600; color: var(--ink); }
.callout-note { border-left-color: var(--accent); }
.callout-note .callout-title { color: var(--navy); }
.callout-caution { border-left-color: var(--prog); background: var(--prog-bg); }
.callout-caution .callout-title { color: var(--prog); }

/* ---- schema identity panel ---- */
.schema-id {
  border: 1px solid var(--line); border-radius: 12px;
  padding: 28px; background: var(--bg);
}
.schema-summary { font-size: 1.02rem; }
.schema-meta {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0; margin: var(--space-2) 0 0;
  border-top: 1px solid var(--line);
}
.schema-meta-item {
  padding: var(--space-4) 0; border-bottom: 1px solid var(--line);
  padding-right: 20px;
}
.schema-meta-item:nth-child(odd) { border-right: 1px solid var(--line); padding-right: var(--space-5); }
.schema-meta-item:nth-child(even) { padding-left: var(--space-5); }
.schema-meta-item dt {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--faint); font-weight: 600; margin-bottom: var(--space-2);
}
.schema-meta-item dd { margin: 0; color: var(--ink); font-size: 0.98rem; }
.schema-meta-item dd code {
  font-family: var(--mono); font-size: 0.86rem; color: var(--navy);
  background: var(--bg-alt); padding: 2px 7px; border-radius: 5px; word-break: break-all;
}
.version-select {
  display: inline-flex; align-items: center; gap: var(--space-2);
  border: 1px solid var(--line-strong); border-radius: 6px;
  padding: var(--space-1) 10px; background: #fff;
}
.version-current { font-family: var(--mono); font-size: 0.86rem; color: var(--ink); font-weight: 600; }
.version-caret { color: var(--muted); font-size: 0.72rem; }
.version-note {
  font-family: var(--mono); font-size: 0.72rem; color: var(--prog);
  text-transform: uppercase; letter-spacing: 0.04em; margin-left: 10px;
}
.schema-source { margin: 20px 0 0; font-size: 0.92rem; }
.schema-source-label {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--faint); font-weight: 600; margin-right: var(--space-2);
}

/* ---- field reference (schema-field rows) ---- */
.field-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.field { padding: 18px 0; border-bottom: 1px solid var(--line); }
.field-head { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.field-name {
  font-family: var(--mono); font-size: 0.95rem; font-weight: 600; color: var(--ink);
}
.field-type {
  font-family: var(--mono); font-size: 0.76rem; color: var(--accent);
  background: #eef3fb; padding: 2px var(--space-2); border-radius: 5px;
}
.field-req, .field-opt {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.05em;
  text-transform: uppercase; padding: 2px 7px; border-radius: 999px; font-weight: 600;
}
.field-req { color: var(--navy); background: #e7eefa; }
.field-opt { color: var(--faint); background: var(--bg-alt); }
.field-desc { margin: 10px 0 0; color: var(--body); font-size: 0.97rem; }
.field-constraints { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: 10px; }
.chip {
  font-family: var(--mono); font-size: 0.78rem; color: var(--muted);
  background: var(--bg-alt); border: 1px solid var(--line);
  padding: 2px var(--space-2); border-radius: 5px;
}

/* ---- code sample ---- */
.code {
  margin: 0; border: 1px solid var(--line-strong); border-radius: 10px;
  overflow: hidden; background: #0d1320;
}
.code-cap {
  display: flex; align-items: center; gap: var(--space-3);
  padding: 10px var(--space-4); background: #121a2b; border-bottom: 1px solid #1d2738;
}
.code-lang {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: #9dc0f0; font-weight: 600;
}
.code-caption { font-size: 0.82rem; color: #8893a3; }
.code pre {
  margin: 0; padding: 18px var(--space-4); overflow-x: auto;
  font-family: var(--mono); font-size: 0.86rem; line-height: 1.6; color: #d7deea;
}
.code code { font-family: inherit; }

/* ---- verification panel ---- */
.verify-panel {
  border: 1px solid var(--line); border-radius: 12px; padding: 26px 28px;
  background: var(--bg-alt);
}
.verify-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-3); }
.verify-head .doc-h2 { margin: 0; padding: 0; }
.verify-meta {
  display: grid; grid-template-columns: 1fr; gap: 0; margin: var(--space-4) 0 0;
  border-top: 1px solid var(--line);
}
.verify-meta > div {
  display: grid; grid-template-columns: 160px 1fr; gap: var(--space-4);
  padding: var(--space-3) 0; border-bottom: 1px solid var(--line);
}
.verify-meta dt {
  font-family: var(--mono); font-size: 0.78rem; color: var(--muted); margin: 0;
}
.verify-meta dd { margin: 0; color: var(--ink); font-size: 0.94rem; }

/* ---- responsive ---- */
@media (max-width: 880px) {
  .docs-grid { grid-template-columns: 1fr; gap: 0; padding-top: var(--space-5); }
  .docs-sidebar {
    position: static; max-height: none; overflow: visible;
    margin-bottom: 28px; padding-bottom: var(--space-5); border-bottom: 1px solid var(--line);
    padding-right: 0;
  }
  .docs-nav { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); }
  .docs-nav-group { margin-bottom: var(--space-2); }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  /* Collapse the inline links into a disclosure panel under the bar. */
  .topnav-links {
    display: none;
    position: absolute; left: 0; right: 0; top: 60px;
    flex-direction: column; gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 10px 24px rgba(20, 24, 31, 0.08);
    padding: var(--space-2) var(--space-5) var(--space-4);
  }
  .topnav-links[data-open] { display: flex; }
  .topnav-links a {
    padding: var(--space-3) 0; font-size: 1rem;
    border-bottom: 1px solid var(--line);
  }
  .topnav-links a:last-child { border-bottom: none; }

  .def-grid, .col-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero-inner { padding: 56px var(--space-5) 52px; }
  .block { padding: var(--space-section-sm) 0; }
  .footer-base { flex-direction: column; }
  .schema-meta { grid-template-columns: 1fr; }
  .schema-meta-item:nth-child(odd) { border-right: none; padding-right: 0; }
  .schema-meta-item:nth-child(even) { padding-left: 0; }
  .verify-meta > div { grid-template-columns: 1fr; gap: var(--space-1); }
}