html.doc-page,
body.doc-page {
  overflow: auto;
  height: auto;
  min-height: 100dvh;
  background: var(--bg);
}
.doc-page .topbar {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  z-index: 40;
}
.doc-page .brand-title {
  font-family: var(--serif);
  font-size: clamp(16px, 2.1vw, 22px);
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.02em;
}
.doc {
  max-width: 44rem;
  margin: 0 auto;
  padding: 24px 18px 80px;
  line-height: 1.65;
}
.doc h1 {
  font-family: var(--serif);
  font-size: clamp(22px, 4vw, 32px);
  margin: 12px 0 8px;
}
.doc .lede {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 24px;
}
.doc h2 {
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--gold);
  margin: 28px 0 10px;
}
.doc h3 {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--ice);
  margin: 16px 0 8px;
}
.doc p { margin: 0 0 14px; font-size: 16px; }
.doc ul, .doc ol { margin: 0 0 16px; padding-left: 1.2em; }
.doc li { margin: 0 0 8px; }
.doc time { color: var(--ice); font-variant-numeric: tabular-nums; }
.doc .note {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--muted);
  font-size: 14px;
}
.doc-foot {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 18px 40px;
  color: var(--muted);
  font-size: 13px;
}
.faq details {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  margin: 0 0 10px;
  background: var(--panel);
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 8px 0 4px; }
.en-block {
  border-top: 1px solid var(--line);
  margin-top: 18px;
  padding-top: 12px;
}
.en-block p,
.en-block li { color: #c9d0d8; }
.toc {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
  background: var(--bg-2);
  margin: 0 0 28px;
}
.faq-item {
  margin: 0 0 8px;
  padding: 4px 0 20px;
  border-bottom: 1px solid var(--line);
}
.faq-item:last-of-type { border-bottom: 0; }
.noscript-note {
  margin: 12px 20px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-2);
}
.pair-imgs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0 0 20px;
}
.pair-imgs figure { margin: 0; }
.pair-imgs img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  display: block;
}
.pair-imgs figcaption {
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}
.doc-page nav a[aria-current="page"] { color: var(--gold); }
@media (max-width: 640px) {
  .pair-imgs { grid-template-columns: 1fr; }
}