@charset "UTF-8";

/* option-berth · the guide
   A reading surface, not a landing page: three columns on a wide screen
   (contents, text, this page), two on a phone. The palette is the brand
   inverted — the site's near-black ground becomes the ink, terracotta stays
   the one accent — plus a second, dark skin for readers who prefer it.
   System faces only: the CSP forbids anything else. */

body.guide-page {
  --bg: #fbfbfa;
  --surface: #f2f2f0;
  --surface-2: #e8e8e4;
  --ink: #1b1e22;
  --ink-strong: #101316;
  --ink-soft: #474c52;
  --muted: #5f646a;
  --accent: #a04f36;
  --accent-light: #b2603f;
  --accent-ink: #ffffff;
  --ok: #2f7a56;
  --fs-meta: 0.8125rem;
  --fs-body: 1rem;
  --fs-lead: 1.125rem;
  --fs-h2: 1.375rem;
  --fs-h1: clamp(1.75rem, 1.1rem + 2.2vw, 2.125rem);
  --measure: 38rem;
  --rail: 268px;
  --aside: 220px;
  --topbar: 56px;
  --radius: 6px;
  --chip: var(--bg);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  background: var(--bg);
  color: var(--ink);
  font-size: var(--fs-body);
  line-height: 1.7;
}

/* The skin follows the reader: the system first, then an explicit choice
   that boot.js has already written onto <html data-theme>. The explicit
   rules come last so they win at equal specificity. */
@media (prefers-color-scheme: dark) {
  body.guide-page {
    --bg: #1b1e22;
    --surface: #23272c;
    --surface-2: #2c3137;
    --ink: #f4f1ea;
    --ink-strong: #fbf9f4;
    --ink-soft: #d3d0c8;
    --muted: #a5a69f;
    --accent: #db9378;
    --accent-light: #ecb49c;
    --accent-ink: #1b1e22;
    --ok: #8fb39a;
  }
}
html[data-theme="light"] { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }
html[data-theme="light"] body.guide-page {
  --bg: #fbfbfa;
  --surface: #f2f2f0;
  --surface-2: #e8e8e4;
  --ink: #1b1e22;
  --ink-strong: #101316;
  --ink-soft: #474c52;
  --muted: #5f646a;
  --accent: #a04f36;
  --accent-light: #b2603f;
  --accent-ink: #ffffff;
  --ok: #2f7a56;
}
html[data-theme="dark"] body.guide-page {
  --bg: #1b1e22;
  --surface: #23272c;
  --surface-2: #2c3137;
  --ink: #f4f1ea;
  --ink-strong: #fbf9f4;
  --ink-soft: #d3d0c8;
  --muted: #a5a69f;
  --accent: #db9378;
  --accent-light: #ecb49c;
  --accent-ink: #1b1e22;
  --ok: #8fb39a;
}
@media (prefers-color-scheme: light) {
  html:not([data-theme="dark"]) { color-scheme: light; }
}

/* --------------------------------------------------------------- top bar */

.doc-top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--surface);
}
.doc-top-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 24px);
  min-height: var(--topbar);
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(16px, 2.4vw, 32px);
}
.doc-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
  white-space: nowrap;
}
.doc-brand img { width: 22px; height: 22px; }
.doc-brand-hyphen { color: var(--accent); }
.doc-brand-tag {
  padding-left: 9px;
  margin-left: 2px;
  border-left: 0;
  font-weight: 500;
  font-size: var(--fs-meta);
  color: var(--muted);
}
.doc-brand-tag::before { content: "/"; margin-right: 9px; color: var(--surface-2); }

.doc-search-open {
  display: flex;
  align-items: center;
  gap: 24px;
  min-width: 220px;
  margin-left: auto;
  padding: 7px 10px 7px 12px;
  border: 0;
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--muted);
  font-size: var(--fs-meta);
  text-align: left;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}
.doc-search-open:hover { color: var(--ink); background: var(--surface-2); }
.doc-search-open kbd {
  margin-left: auto;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--surface-2);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.doc-tools { display: flex; align-items: center; gap: clamp(8px, 1.4vw, 18px); }
.doc-tool {
  font-size: var(--fs-meta);
  color: var(--ink-soft);
  transition: color 160ms var(--ease);
}
.doc-tool:hover { color: var(--accent); }

.doc-lang { position: relative; }
.doc-lang > summary {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: var(--fs-meta);
  cursor: pointer;
  list-style: none;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}
.doc-lang > summary::-webkit-details-marker { display: none; }
.doc-lang > summary:hover { color: var(--ink); background: var(--surface-2); }
.doc-caret {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
}
.doc-lang ul {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  z-index: 25;
  min-width: 150px;
  margin: 0;
  padding: 6px;
  list-style: none;
  border-radius: var(--radius);
  background: var(--bg);
}
.doc-lang[open] ul { box-shadow: 0 10px 30px rgb(0 0 0 / 18%); } /* taste-skill-ignore: the language menu floats */
.doc-lang li a {
  display: block;
  padding: 7px 10px;
  border-radius: 4px;
  font-size: var(--fs-meta);
  color: var(--ink-soft);
}
.doc-lang li a:hover { background: var(--surface); color: var(--ink); }
.doc-lang li a[aria-current="true"] { color: var(--accent); font-weight: 600; }

.doc-theme,
.doc-rail-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink-soft);
  font-size: var(--fs-meta);
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}
.doc-theme:hover,
.doc-rail-toggle:hover { background: var(--surface-2); color: var(--ink); }
.doc-theme { background: var(--chip); }
.doc-theme:hover { background: var(--surface-2); }
.doc-theme-glyph {
  position: relative;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: currentColor;
}
.doc-theme-glyph::after {
  content: "";
  position: absolute;
  top: -2px;
  right: -4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--chip);
}
html[data-theme="light"] .doc-theme-glyph::after,
html:not([data-theme]) .doc-theme-glyph::after { content: none; }
html[data-theme="light"] .doc-theme-glyph { background: currentColor; }
.doc-rail-toggle { display: none; }
.doc-rail-glyph,
.doc-rail-glyph::before,
.doc-rail-glyph::after {
  display: block;
  width: 15px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}
.doc-rail-glyph { position: relative; }
.doc-rail-glyph::before,
.doc-rail-glyph::after { content: ""; position: absolute; left: 0; }
.doc-rail-glyph::before { top: -5px; }
.doc-rail-glyph::after { top: 5px; }

/* ----------------------------------------------------------------- shell */

.doc-shell {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(16px, 2.4vw, 32px);
}
.doc-rail {
  position: sticky;
  top: var(--topbar);
  align-self: start;
  max-height: calc(100vh - var(--topbar));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 28px 24px 48px 0;
  scrollbar-width: thin;
}
.rail-part {
  margin: 18px 0 6px;
  padding-inline: 10px;
  font-size: var(--fs-meta);
  font-weight: 600;
  color: var(--muted);
}
.rail-part:first-child { margin-top: 0; }
.rail-list { margin: 0; padding: 0; list-style: none; }
.rail-link {
  position: relative;
  display: block;
  padding: 6px 10px;
  border-radius: 5px;
  font-size: 0.9375rem;
  line-height: 1.35;
  color: var(--ink-soft);
  transition: color 140ms var(--ease), background-color 140ms var(--ease);
}
.rail-link:hover { background: var(--surface); color: var(--ink); }
.rail-link.is-current {
  background: var(--surface);
  color: var(--ink-strong);
  font-weight: 600;
}
.rail-link.is-current::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 3px;
  border-radius: 999px;
  background: var(--accent);
}

.doc-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--aside);
  gap: clamp(32px, 4vw, 64px);
  align-items: start;
  min-width: 0;
  padding: 36px 0 96px clamp(0px, 1.6vw, 24px);
}
.doc-article { min-width: 0; max-width: 44rem; }

/* ---------------------------------------------------------- article head */

.doc-crumbs { font-size: var(--fs-meta); color: var(--muted); }
.doc-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.doc-crumbs li + li::before { content: "/"; margin-inline: 8px; color: var(--muted); }
.doc-crumbs a { color: var(--muted); }
.doc-crumbs a:hover { color: var(--accent); }

.doc-article h1 {
  margin: 10px 0 0;
  font-size: var(--fs-h1);
  line-height: 1.12;
  letter-spacing: -0.028em;
  color: var(--ink-strong);
}
/* ------------------------------------------------------------------ prose */

.doc-prose { margin-top: 22px; }
.doc-prose > * { max-width: var(--measure); }
.doc-prose > figure,
.doc-prose > table { max-width: min(100%, 44rem); }

.doc-prose p { margin: 0 0 16px; }
.doc-prose .chapter-intro {
  max-width: var(--measure);
  margin-bottom: 26px;
  font-size: var(--fs-lead);
  line-height: 1.58;
  color: var(--ink-soft);
}
.doc-prose strong { color: var(--ink-strong); font-weight: 600; }

.doc-prose h2 {
  position: relative;
  margin: 44px 0 12px;
  font-size: var(--fs-h2);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink-strong);
  scroll-margin-top: calc(var(--topbar) + 16px);
}
.doc-prose h3 {
  margin: 28px 0 8px;
  font-size: var(--fs-lead);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
  scroll-margin-top: calc(var(--topbar) + 16px);
}
.doc-prose h2 a.anchor,
.doc-prose h3 a.anchor {
  position: absolute;
  left: -1.1em;
  padding-right: 0.4em;
  color: var(--muted);
  opacity: 0;
  text-decoration: none;
  transition: opacity 140ms var(--ease), color 140ms var(--ease);
}
.doc-prose h2:hover a.anchor,
.doc-prose h3:hover a.anchor,
.doc-prose a.anchor:focus-visible { opacity: 1; }
.doc-prose a.anchor:hover { color: var(--accent); }

.doc-prose ul,
.doc-prose ol { margin: 0 0 16px; padding-left: 22px; }
.doc-prose li { margin: 6px 0; }
.doc-prose li::marker { color: var(--accent); }

.doc-prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-underline-offset: 2px;
  transition: text-decoration-color 140ms var(--ease);
}
.doc-prose a:hover { text-decoration-color: var(--accent); }
.doc-prose a.anchor { text-decoration: none; }

.doc-prose :not(pre) > code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink-strong);
  font-family: var(--font-mono);
  font-size: 0.875em;
  overflow-wrap: anywhere;
}

.doc-prose figure.fragment { margin: 20px 0 22px; min-width: 0; }
.fragment-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--surface-2);
  color: var(--muted);
  font-size: var(--fs-meta);
  line-height: 1.4;
}
.doc-prose pre {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.62;
  overflow-x: auto;
  tab-size: 2;
}
.fragment-label + pre { border-radius: 0 0 var(--radius) var(--radius); }
.doc-prose > pre { margin: 20px 0 22px; }
pre code { font: inherit; color: inherit; background: none; padding: 0; }

.doc-prose table.chapter-table {
  width: 100%;
  margin: 20px 0 24px;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.55;
}
.chapter-table caption { caption-side: top; }
.chapter-table th,
.chapter-table td {
  padding: 9px 12px 9px 0;
  text-align: left;
  vertical-align: top;
  overflow-wrap: anywhere;
}
.chapter-table thead th {
  padding-block: 8px;
  border-bottom: 1px solid var(--surface-2);
  color: var(--muted);
  font-size: var(--fs-meta);
  font-weight: 600;
}
.chapter-table tbody tr + tr th,
.chapter-table tbody tr + tr td { border-top: 1px solid var(--surface-2); }
.chapter-table tbody th { color: var(--ink-strong); font-weight: 600; white-space: nowrap; }

.doc-prose aside.note {
  position: relative;
  margin: 22px 0;
  padding: 14px 18px 14px 20px;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 0.9375rem;
  line-height: 1.65;
}
.doc-prose aside.note::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 999px;
  background: var(--accent);
}
.doc-prose aside.note p:last-child { margin-bottom: 0; }
.doc-prose aside.note strong { color: var(--ink-strong); }

.doc-prose img { max-width: 100%; height: auto; border-radius: var(--radius); }
.doc-prose dl { margin: 0 0 16px; }
.doc-prose dt { margin-top: 12px; font-weight: 600; color: var(--ink-strong); }
.doc-prose dd { margin: 2px 0 0; color: var(--ink-soft); }
.doc-prose blockquote {
  margin: 20px 0;
  padding-left: 16px;
  border-left: 3px solid var(--surface-2);
  color: var(--ink-soft);
}

/* ----------------------------------------------------------------- pager */

.doc-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 56px;
  max-width: 46rem;
}
.pager-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  transition: background-color 160ms var(--ease);
}
.pager-link:hover { background: var(--surface-2); }
.pager-link span { font-size: var(--fs-meta); color: var(--muted); }
.pager-link strong {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink-strong);
}
.pager-next { grid-column: 2; text-align: right; }
.pager-prev:only-child { grid-column: 1; }

.doc-edit { margin: 24px 0 0; font-size: var(--fs-meta); }
.doc-edit a { color: var(--muted); }
.doc-edit a:hover { color: var(--accent); }

/* ----------------------------------------------------------------- aside */

.doc-aside {
  position: sticky;
  top: calc(var(--topbar) + 24px);
  display: grid;
  gap: 26px;
  padding: 16px 10px 18px;
  border-radius: var(--radius);
  background: var(--surface);
  font-size: var(--fs-meta);
  line-height: 1.5;
}
.doc-aside h2,
.doc-toc > summary {
  margin: 0 0 8px;
  font-size: var(--fs-meta);
  font-weight: 600;
  color: var(--ink-strong);
}
.doc-toc > summary {
  display: none;
  cursor: pointer;
  list-style: none;
  padding-bottom: 8px;
}
.doc-toc > summary::-webkit-details-marker { display: none; }
.doc-toc ol,
.doc-aside ul { margin: 0; padding: 0; list-style: none; }
.doc-toc li { margin: 0; }
.doc-toc .toc-sub { padding-left: 12px; }
.doc-toc a {
  position: relative;
  display: block;
  padding: 4px 10px;
  border-radius: 5px;
  color: var(--ink-soft);
  transition: color 140ms var(--ease), background-color 140ms var(--ease);
}
.doc-toc a:hover { color: var(--ink); background: var(--surface-2); }
.doc-toc a.is-active {
  color: var(--ink-strong);
  font-weight: 600;
}
.doc-toc a.is-active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  bottom: 7px;
  width: 2px;
  border-radius: 999px;
  background: var(--accent);
}
.doc-aside ul a {
  display: block;
  padding: 3px 0;
  color: var(--ink-soft);
  text-decoration: none;
}
.doc-aside ul a:hover { text-decoration: underline; text-underline-offset: 2px; }
.doc-aside ul a:hover { color: var(--accent); }
.doc-aside-machine p {
  margin: 0 0 8px;
  color: var(--muted);
  line-height: 1.5;
}

/* ---------------------------------------------------------------- footer */

.doc-foot {
  background: var(--surface);
  color: var(--ink-soft);
}
.doc-foot-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: clamp(24px, 4vw, 64px);
  max-width: 1440px;
  margin-inline: auto;
  padding: clamp(32px, 4vw, 56px) clamp(16px, 2.4vw, 32px) 24px;
}
.doc-foot-mark { display: flex; align-items: center; gap: 14px; }
.doc-foot-mark img { width: 44px; height: 44px; opacity: 0.9; }
.doc-foot-mark p {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink-strong);
}
.doc-foot-mark span {
  display: block;
  margin-top: 2px;
  font-size: var(--fs-meta);
  font-weight: 400;
  color: var(--muted);
}
.doc-foot-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}
.doc-foot-cols h2 {
  margin: 0 0 8px;
  font-size: var(--fs-meta);
  font-weight: 600;
  color: var(--ink-strong);
}
.doc-foot-cols ul { margin: 0; padding: 0; list-style: none; }
.doc-foot-cols li { margin: 5px 0; }
.doc-foot-cols a { font-size: var(--fs-meta); color: var(--ink-soft); }
.doc-foot-cols a:hover { color: var(--accent); }
.doc-foot-base {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 1440px;
  margin-inline: auto;
  padding: 16px clamp(16px, 2.4vw, 32px) 28px;
  font-size: var(--fs-meta);
  color: var(--muted);
}
.doc-foot-base p { margin: 0; }

/* ------------------------------------------------------------------ copy */

.copy-button {
  margin-left: auto;
  padding: 2px 8px;
  border: 0;
  border-radius: 4px;
  background: var(--bg);
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.6;
  transition: color 140ms var(--ease), background-color 140ms var(--ease);
}
.copy-button:hover { color: var(--ink); background: var(--surface); }
.copy-button.is-copied { color: var(--accent); }
figure.fragment { position: relative; }

/* ---------------------------------------------------------------- search */

.doc-search {
  width: min(640px, calc(100vw - 32px));
  max-height: min(70vh, 640px);
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
  box-shadow: 0 24px 60px rgb(0 0 0 / 30%); /* taste-skill-ignore: the search dialog floats */
}
.doc-search::backdrop { background: rgb(12 14 16 / 55%); }
.doc-search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--surface);
}
.doc-search-input {
  flex: 1;
  min-width: 0;
  padding: 6px 2px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: var(--fs-lead);
}
.doc-search-input:focus { outline: none; }
.doc-search-input::placeholder { color: var(--muted); }
.doc-search-close {
  padding: 4px 8px;
  border: 0;
  border-radius: 5px;
  background: var(--bg);
  color: var(--muted);
}
.doc-search-close kbd { font-family: var(--font-mono); font-size: 0.75rem; }
.doc-search-hint,
.doc-search-empty {
  margin: 0;
  padding: 16px 18px;
  font-size: var(--fs-meta);
  color: var(--muted);
}
.doc-search-results {
  margin: 0;
  padding: 6px;
  list-style: none;
  overflow-y: auto;
  max-height: min(60vh, 560px);
}
.doc-search-results li { margin: 0; }
.doc-search-result {
  display: block;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--ink-soft);
}
.doc-search-result:hover,
.doc-search-result.is-active { background: var(--surface); color: var(--ink); }
.doc-search-result .result-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: var(--fs-meta);
  color: var(--muted);
}
.doc-search-result .result-head strong {
  font-size: 0.9375rem;
  color: var(--ink-strong);
  font-weight: 600;
}
.doc-search-result p {
  margin: 3px 0 0;
  font-size: var(--fs-meta);
  line-height: 1.5;
  color: var(--ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.doc-search-result mark { background: none; color: var(--accent); font-weight: 600; }

/* ------------------------------------------------------------------ motion */

.reveal { opacity: 0; transform: translateY(10px); }
.reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}
.reveal[data-reveal="1"].is-in { transition-delay: 60ms; }
.reveal[data-reveal="2"].is-in { transition-delay: 120ms; }
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.is-in { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ------------------------------------------------------------- narrower */

@media (max-width: 1180px) {
  body.guide-page { --rail: 232px; --aside: 190px; }
  .doc-body { gap: 32px; }
}

@media (max-width: 1000px) {
  .doc-rail-toggle { display: flex; }
  .doc-search-open { min-width: 0; margin-left: auto; }
  .doc-search-open [data-search-label] { display: none; }
  .doc-search-open kbd { display: none; }
  .doc-search-open { padding: 6px 8px; }
  .doc-search-open::before {
    content: "";
    width: 14px;
    height: 14px;
    border: 2px solid currentColor;
    border-radius: 50%;
  }
  .doc-shell { grid-template-columns: minmax(0, 1fr); }
  .doc-rail {
    position: fixed;
    inset: var(--topbar) 0 auto 0;
    z-index: 15;
    max-height: calc(100vh - var(--topbar));
    margin: 0;
    padding: 16px clamp(16px, 2.4vw, 32px) 32px;
    background: var(--bg);
    transform: translateX(-100%);
    visibility: hidden;
    transition: transform 220ms var(--ease), visibility 220ms;
  }
  html[data-rail-open="true"] .doc-rail { transform: none; visibility: visible; }
  .doc-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
    padding: 28px 0 72px;
  }
  .doc-article { max-width: none; }
  .doc-aside {
    position: static;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 16px;
  }
  .doc-toc {
    padding: 4px 0;
    border-radius: 5px;
    background: var(--bg);
  }
  .doc-toc > summary {
    display: block;
    margin: 0;
    padding: 12px 16px;
  }
  .doc-toc > nav { padding: 0 8px 10px; }
  .doc-prose > figure,
  .doc-prose > table { max-width: min(100%, 46rem); }
}

@media (max-width: 720px) {
  body.guide-page { --fs-h2: 1.25rem; }
  .doc-tools .doc-tool { display: none; }
  .doc-brand-tag { display: none; }
  .doc-search-open { margin-left: auto; }
  .doc-top-inner { gap: 8px; }
  .doc-pager { grid-template-columns: minmax(0, 1fr); }
  .pager-next { grid-column: 1; text-align: left; }
  .doc-foot-inner { grid-template-columns: minmax(0, 1fr); }
  .doc-foot-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chapter-table { font-size: 0.875rem; }
  .chapter-table th,
  .chapter-table td { padding-right: 8px; }
  .chapter-table tbody th { white-space: normal; }
}

@media (max-width: 460px) {
  .doc-foot-cols { grid-template-columns: minmax(0, 1fr); }
  .doc-tools { gap: 2px; }
  .doc-brand-name { font-size: 0.875rem; }
  .doc-search-open { padding-inline: 6px; }
}

@media print {
  .doc-top, .doc-rail, .doc-aside, .doc-pager, .doc-edit, .doc-foot { display: none; }
  .doc-shell, .doc-body { display: block; padding: 0; }
  body.guide-page { --bg: #fff; --ink: #000; }
}