:root {
  --text: #1b1b1b;
  --muted: #5c5c5c;
  --border: #e2e2e2;
  --bg: #fff;
  --aside: #f7f7f7;
  --code: #f3f3f3;
  --link: #0b57d0;
  --max: 52rem;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font: 16px/1.55 ui-sans-serif, system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.875em; }
code { background: var(--code); padding: 0.1em 0.35em; border-radius: 3px; }
pre { background: var(--code); padding: 0.9rem 1rem; overflow: auto; border-radius: 6px; }
pre code { background: none; padding: 0; }
.wrap { display: grid; grid-template-columns: 15.5rem 1fr; min-height: 100vh; }
nav {
  background: var(--aside);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem 2rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}
nav .brand { font-weight: 650; font-size: 0.95rem; margin: 0 0 1rem; color: var(--text); text-decoration: none; }
nav p.label { margin: 1rem 0 0.35rem; font-size: 0.7rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
nav a { display: block; padding: 0.2rem 0; color: var(--text); font-size: 0.9rem; }
nav a.active { font-weight: 600; }
main { padding: 1.75rem 2rem 4rem; max-width: calc(var(--max) + 4rem); }
h1 { font-size: 1.75rem; font-weight: 650; letter-spacing: -0.02em; margin: 0 0 0.75rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.6rem; }
h3 { font-size: 1.02rem; margin: 1.4rem 0 0.4rem; }
p, li { color: var(--text); }
.lead { font-size: 1.05rem; }
.muted, .note { color: var(--muted); font-size: 0.92rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; margin: 0.75rem 0 1.25rem; }
th, td { border-bottom: 1px solid var(--border); text-align: left; padding: 0.45rem 0.4rem; vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.note { border-left: 3px solid var(--border); padding: 0.35rem 0.75rem; margin: 1rem 0; }
.toc { font-size: 0.9rem; margin: 0 0 1.5rem; padding: 0.75rem 1rem; background: var(--aside); border-radius: 6px; }
.toc p { margin: 0 0 0.35rem; font-size: 0.7rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.toc ul { margin: 0; padding-left: 1.1rem; }
.pager { display: flex; justify-content: space-between; gap: 1rem; margin: 2.5rem 0 0; padding-top: 1rem; border-top: 1px solid var(--border); font-size: 0.92rem; }
.pager span { color: var(--muted); display: block; font-size: 0.75rem; }
@media (max-width: 800px) {
  .wrap { grid-template-columns: 1fr; }
  nav { position: relative; height: auto; border-right: 0; border-bottom: 1px solid var(--border); }
}