/* GENERATED by web/tools/build-help.mjs — do not hand-edit.
   Matches the product site's instrument-panel aesthetic (web/css/site.css):
   near-black surfaces, 1px machined borders, DRO-amber accent, tabular numerals. */
:root {
  --bg: #0e0f11;
  --bg-raised: #131519;
  --bg-inset: #0a0b0d;
  --line: #24262b;
  --line-strong: #3a3d44;
  --text: #e8eaed;
  --text-dim: #9aa0a8;
  --text-faint: #5c6067;
  --accent: #ffb000;
  --accent-dim: #8a6200;
  --ok: #38d178;
  --warn: #ff5f45;
  --font-ui: "Inter", "Inter var", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --maxw: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 48px 48px;
}
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

/* ---------- header ---------- */
.help-header {
  border-bottom: 1px solid var(--line);
  background: rgba(14, 15, 17, 0.92);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(6px);
}
.help-header .hwrap {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 16px; height: 56px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 600; letter-spacing: 0.02em;
}
.brand:hover { text-decoration: none; }
.brand .mark { height: 30px; width: auto; flex: none; display: block; }
.brand .sub { color: var(--text-faint); font-weight: 500; margin-left: 2px; }
.nav-toggle {
  display: none; border: 1px solid var(--line-strong); background: var(--bg-raised);
  color: var(--text-dim); font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.08em; padding: 7px 12px; cursor: pointer;
}

/* ---------- layout ---------- */
.help-layout {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 264px minmax(0, 1fr); gap: 40px;
  align-items: start;
}
.help-nav {
  position: sticky; top: 56px; max-height: calc(100vh - 56px);
  overflow-y: auto; padding: 24px 16px 48px 0;
  border-right: 1px solid var(--line);
  font-size: 13.5px;
}
.help-main { padding: 36px 0 96px; min-width: 0; }

/* ---------- sidebar tree ---------- */
.toc-home {
  display: block; color: var(--text); font-weight: 600;
  padding: 6px 8px; margin-bottom: 10px; border: 1px solid transparent;
}
.toc-home.here, .toc-home:hover { border-color: var(--line); background: var(--bg-raised); text-decoration: none; }
.toc details { border-top: 1px solid var(--line); }
.toc details:last-child { border-bottom: 1px solid var(--line); }
.toc summary {
  cursor: pointer; list-style: none; padding: 8px 8px;
  font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--text-faint);
}
.toc summary::before { content: "+ "; color: var(--accent-dim); }
.toc details[open] summary::before { content: "\2212 "; }
.toc summary::-webkit-details-marker { display: none; }
.toc summary:hover { color: var(--text-dim); }
.toc ul { list-style: none; padding: 0 0 10px; }
.toc li a, .toc li span {
  display: block; padding: 4px 8px 4px 20px; color: var(--text-dim);
}
.toc li a:hover { color: var(--text); text-decoration: none; }
.toc li.here a {
  color: var(--accent); background: var(--bg-raised);
  border-left: 2px solid var(--accent); padding-left: 18px;
}
.toc li.todo span { color: var(--text-faint); }

/* ---------- search ---------- */
.search-box { margin: 0 0 16px; }
.search-box input {
  width: 100%; background: var(--bg-inset); border: 1px solid var(--line-strong);
  color: var(--text); padding: 8px 10px; font-size: 13.5px; font-family: var(--font-ui);
}
.search-box input:focus { border-color: var(--accent-dim); outline: none; }
#search-results { margin-bottom: 16px; }
#search-results .hit { display: block; padding: 8px; border: 1px solid var(--line); border-top: 0; background: var(--bg-raised); }
#search-results .hit:first-child { border-top: 1px solid var(--line); }
#search-results .hit:hover { text-decoration: none; border-color: var(--accent-dim); }
#search-results .hit .t { display: block; color: var(--text); font-weight: 600; }
#search-results .hit .p { display: block; font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); margin-top: 2px; }
#search-results .hit .s { display: block; color: var(--text-dim); font-size: 12.5px; margin-top: 3px; }
#search-results .none { padding: 10px 8px; color: var(--text-faint); font-size: 13px; border: 1px dashed var(--line); }

/* ---------- article ---------- */
.crumbs {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 18px;
}
.crumbs::before { content: "// "; color: var(--accent-dim); }
.crumbs .sep { color: var(--accent-dim); }
.doc { max-width: 760px; }
.doc h1 {
  font-size: clamp(26px, 4vw, 34px); line-height: 1.15; font-weight: 700;
  letter-spacing: -0.015em; margin-bottom: 18px;
}
.doc h2 {
  font-size: 19px; font-weight: 650; margin: 40px 0 12px;
  padding-top: 22px; border-top: 1px solid var(--line);
}
.doc h3 { font-size: 15.5px; font-weight: 600; margin: 28px 0 10px; color: var(--text); }
.doc p { margin: 0 0 14px; color: var(--text-dim); }
.doc p strong, .doc li strong { color: var(--text); font-weight: 600; }
.doc ul, .doc ol { margin: 0 0 16px; padding-left: 24px; color: var(--text-dim); }
.doc li { margin-bottom: 7px; }
.doc code {
  font-family: var(--font-mono); font-size: 0.92em;
  background: var(--bg-inset); border: 1px solid var(--line);
  padding: 1px 5px; color: var(--text); white-space: nowrap;
}
.doc pre {
  background: var(--bg-inset); border: 1px solid var(--line);
  padding: 14px 16px; overflow-x: auto; margin: 0 0 16px;
}
.doc pre code { background: none; border: 0; padding: 0; white-space: pre; font-size: 13px; color: var(--text); }
.doc figure {
  margin: 20px 0 22px; border: 1px solid var(--line); background: var(--bg-raised);
  padding: 10px; max-width: 560px;
}
.doc figure img { display: block; max-width: 100%; height: auto; }
.doc figcaption {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-faint);
  padding-top: 9px; line-height: 1.45;
}
.doc figcaption::before { content: "\25b8 "; color: var(--accent-dim); }
.doc .table-scroll { overflow-x: auto; margin: 0 0 18px; }
.doc table { width: 100%; border-collapse: collapse; border: 1px solid var(--line); font-size: 13.5px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; vertical-align: top; }
.doc th {
  background: var(--bg-inset); color: var(--text-faint); font-family: var(--font-mono);
  font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em;
}
.doc td { background: var(--bg-raised); color: var(--text-dim); }
.doc td code, .doc th code { white-space: pre; }

/* ---------- callouts ---------- */
.callout {
  border: 1px solid var(--line); border-left-width: 2px;
  background: var(--bg-raised); padding: 13px 16px 2px; margin: 0 0 18px;
}
.callout .callout-label {
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 7px;
}
.callout-note { border-left-color: var(--line-strong); }
.callout-note .callout-label { color: var(--text-faint); }
.callout-tip { border-left-color: var(--ok); }
.callout-tip .callout-label { color: var(--ok); }
.callout-warning { border-left-color: var(--accent); }
.callout-warning .callout-label { color: var(--accent); }
.callout-danger { border-left-color: var(--warn); background: rgba(255, 95, 69, 0.05); }
.callout-danger .callout-label { color: var(--warn); }
.callout .callout, .callout figure { margin-bottom: 13px; }

/* ---------- steps ---------- */
.steps {
  border: 1px solid var(--line); background: var(--bg-raised);
  padding: 16px 18px 4px; margin: 0 0 18px;
}
.steps ol { list-style: none; padding-left: 0; counter-reset: step; }
.steps ol li {
  counter-increment: step; position: relative; padding-left: 40px; margin-bottom: 12px;
}
.steps ol li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 1px;
  font-family: var(--font-mono); font-size: 12px; color: var(--accent);
  border: 1px solid var(--accent-dim); padding: 1px 5px;
}

/* ---------- index topic grid ---------- */
.doc .lede { font-size: 16.5px; max-width: 640px; }
.topic-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 28px;
}
@media (max-width: 720px) { .topic-grid { grid-template-columns: 1fr; } }
.topic-card { background: var(--bg-raised); padding: 20px 22px; }
.topic-card h2 {
  border: 0; padding: 0; margin: 0 0 6px;
  font-size: 13px; font-family: var(--font-mono); text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--text); font-weight: 600;
}
.topic-card h2::before { content: "// "; color: var(--accent-dim); }
.topic-card .topic-summary { font-size: 13px; color: var(--text-faint); margin-bottom: 10px; }
.topic-card ul { list-style: none; padding: 0; margin: 0; }
.topic-card li { margin: 0; padding: 4px 0; border-top: 1px solid var(--line); }
.topic-card li:first-child { border-top: 0; }
.topic-card li a { color: var(--text-dim); display: block; }
.topic-card li a:hover { color: var(--accent); text-decoration: none; }
.topic-card li .planned {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--text-faint);
  border: 1px solid var(--line-strong); padding: 1px 6px; text-transform: uppercase; letter-spacing: 0.08em;
}
.doc .topic-grid + * { margin-top: 24px; }

/* ---------- footer / pager ---------- */
.doc-footer { margin-top: 48px; border-top: 1px solid var(--line); padding-top: 18px; }
.updated { font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); margin-bottom: 18px; }
.pager { display: flex; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.pager a, .pager > span { flex: 1; background: var(--bg-raised); padding: 12px 16px; min-height: 58px; }
.pager a:hover { text-decoration: none; background: var(--bg-inset); }
.pager .next { text-align: right; }
.pager .k {
  display: block; font-family: var(--font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); margin-bottom: 4px;
}
.pager .t { color: var(--text); font-weight: 600; font-size: 14px; }
.pager a:hover .t { color: var(--accent); }

/* ---------- narrow viewports ---------- */
@media (max-width: 900px) {
  .help-layout { grid-template-columns: 1fr; gap: 0; }
  .nav-toggle { display: inline-block; }
  .help-nav {
    display: none; position: static; max-height: none; border-right: 0;
    border-bottom: 1px solid var(--line); padding: 20px 0;
  }
  body.nav-open .help-nav { display: block; }
  .help-main { padding-top: 28px; }
}