:root {
  --bg: #fbfbfc; --fg: #1d1f24; --muted: #5d6270; --line: #dfe2e8;
  --side: #f1f3f6; --accent: #1f8d9b; --code: #eceef2; --kbd: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1d22; --fg: #e3e5ea; --muted: #a0a5b2; --line: #33363e;
    --side: #23252b; --accent: #4fc1cf; --code: #2b2e35; --kbd: #30333b;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
.top { display: flex; align-items: center; justify-content: space-between;
       padding: 10px 20px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg);
         text-decoration: none; font-weight: 700; font-size: 1.1rem; }
.repo { font-size: .95rem; }
.layout { display: grid; grid-template-columns: 250px minmax(0, 1fr);
          max-width: 1100px; margin: 0 auto; }
.toc { background: var(--side); border-right: 1px solid var(--line);
       padding: 18px 16px; min-height: calc(100vh - 57px); }
.toc h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em;
          color: var(--muted); margin: 0 0 8px; }
.toc ol { margin: 0; padding-left: 22px; }
.toc li { margin: 4px 0; }
.toc a { text-decoration: none; color: var(--fg); }
.toc a[aria-current="page"] { color: var(--accent); font-weight: 600; }
main { padding: 24px 36px 40px; max-width: 820px; }
main h1 { margin-top: 0; font-size: 1.9rem; }
main h2 { margin-top: 2em; padding-bottom: 4px; border-bottom: 1px solid var(--line); }
main h3 { margin-top: 1.6em; }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: .92em; }
pre { background: var(--code); padding: 12px 14px; border-radius: 8px; overflow-x: auto; }
pre code { padding: 0; background: none; }
kbd { background: var(--kbd); border: 1px solid var(--line); border-bottom-width: 2px;
      border-radius: 4px; padding: 0 5px; font: .85em ui-monospace, monospace; white-space: nowrap; }
table { border-collapse: collapse; width: 100%; margin: 1em 0; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
th { background: var(--side); }
blockquote { margin: 1em 0; padding: 8px 14px; border-left: 4px solid var(--accent);
             background: var(--side); border-radius: 0 6px 6px 0; }
blockquote p { margin: .3em 0; }
footer { margin-top: 3em; padding-top: 12px; border-top: 1px solid var(--line);
         color: var(--muted); font-size: .9rem; }
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .toc { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  main { padding: 20px 16px 32px; }
}