:root {
  --bg: #ffffff;
  --fg: #1c1f23;
  --muted: #5b6470;
  --line: #e3e7ec;
  --accent: #0b5fff;
  --code: #f5f7fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181c;
    --fg: #e8eaed;
    --muted: #9aa4b2;
    --line: #2a3038;
    --accent: #6ea8ff;
    --code: #1d2228;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: var(--bg); z-index: 10;
}
.brand { font-weight: 700; font-size: 18px; color: var(--fg); letter-spacing: -0.02em; }
.brand .mark { width: 22px; height: 22px; vertical-align: -5px; margin-right: 8px; border-radius: 5px; }
#q {
  margin-left: auto; width: 260px; padding: 8px 12px;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--fg); font-size: 14px;
}
.banner {
  background: #fff4e5; color: #7a3d00; border-bottom: 1px solid #f0d3a8;
  padding: 8px 20px; font-size: 14px;
}
.shell { display: flex; align-items: flex-start; max-width: 1180px; margin: 0 auto; }
.sidebar {
  width: 260px; padding: 24px 20px; position: sticky; top: 57px;
  max-height: calc(100vh - 57px); overflow: auto; border-right: 1px solid var(--line);
}
.nav-label { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 18px 0 6px; }
.nav-group:first-child .nav-label { margin-top: 0; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li { margin: 2px 0; }
.sidebar a { display: block; padding: 6px 8px; border-radius: 6px; color: var(--fg); font-size: 15px; }
.sidebar a.active { background: var(--code); font-weight: 600; }
.content { flex: 1; min-width: 0; padding: 32px 40px 80px; }
article h1 { font-size: 30px; margin: 0 0 8px; letter-spacing: -0.02em; }
article h2 { font-size: 22px; margin: 32px 0 10px; padding-top: 8px; border-top: 1px solid var(--line); }
article h3 { font-size: 17px; margin: 22px 0 8px; }
article p, article li { color: var(--fg); }
article code { background: var(--code); padding: 2px 5px; border-radius: 4px; font-size: 0.92em; }
article pre { background: var(--code); padding: 14px; border-radius: 8px; overflow: auto; }
article table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 15px; }
article th, article td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
article th { background: var(--code); }
.doc-footer { display: flex; gap: 16px; margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.search-hint { margin-left: auto; }
.results {
  position: fixed; inset: 60px 0 auto 0; margin: 0 auto; max-width: 720px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 18px 40px rgba(0,0,0,0.18); padding: 8px; z-index: 20; max-height: 60vh; overflow: auto;
}
.results a { display: block; padding: 8px 10px; border-radius: 6px; color: var(--fg); }
.results a:hover { background: var(--code); }
.results .excerpt { display: block; color: var(--muted); font-size: 13px; }
@media (max-width: 860px) {
  .sidebar { display: none; }
  .content { padding: 20px; }
  #q { width: 140px; }
}