:root { color-scheme: light; --blue: #2f6fde; --ink: #1f2328; --muted: #59636e; --line: #d0d7de; --soft: #f4f7fd; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif; color: var(--ink); background: #fff; }
a { color: #1f5fcc; text-decoration: none; }
a:hover { text-decoration: underline; }
header.top { background: #1b1f24; color: #fff; }
header.top .bar { max-width: 1180px; margin: 0 auto; padding: 12px 16px; display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; }
header.top a { color: #fff; }
header.top .brand { font-weight: 700; margin-right: auto; }
header.top .tools { display: flex; gap: 16px; flex-wrap: wrap; font-size: 14px; }
.layout { max-width: 1180px; margin: 0 auto; padding: 0 16px; display: flex; gap: 40px; align-items: flex-start; }
aside.chapters { display: none; width: 250px; flex: none; position: sticky; top: 16px; padding: 24px 0; max-height: 100vh; overflow-y: auto; font-size: 14px; }
aside.chapters h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 0 0 8px; }
aside.chapters ol { list-style: none; margin: 0; padding: 0; }
aside.chapters li a { display: block; padding: 5px 10px; border-radius: 6px; color: var(--ink); line-height: 1.35; }
aside.chapters li a:hover { background: #eef1f5; text-decoration: none; }
aside.chapters li a[aria-current] { background: var(--blue); color: #fff; }
main { min-width: 0; flex: 1; padding: 24px 0 48px; max-width: 820px; }
main h1 { font-size: 30px; line-height: 1.2; margin: 0 0 20px; padding-bottom: 12px; border-bottom: 2px solid var(--blue); }
main h2 { font-size: 22px; margin: 36px 0 10px; }
main h3 { font-size: 18px; margin: 28px 0 8px; }
main img { max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 6px; display: block; margin: 16px auto; }
main td img { margin: 0; }
main blockquote { margin: 16px 0; padding: 4px 16px; background: var(--soft); border-left: 3px solid var(--blue); border-radius: 0 6px 6px 0; }
main blockquote p { margin: 8px 0; }
main code { background: #eff1f3; padding: 1px 5px; border-radius: 4px; font-size: .9em; }
main pre { background: #f6f8fa; border: 1px solid var(--line); border-radius: 6px; padding: 12px 14px; overflow-x: auto; }
main pre code { background: none; padding: 0; }
.table { overflow-x: auto; margin: 16px 0; }
main table { border-collapse: collapse; width: 100%; font-size: 15px; }
main td, main th { border: 1px solid var(--line); padding: 6px 10px; vertical-align: top; text-align: left; }
main th { background: #f1f3f5; }
nav.pager { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin: 40px 0 0; padding-top: 16px; border-top: 1px solid var(--line); font-size: 15px; }
nav.pager.first { margin: 0 0 24px; padding: 0 0 12px; border-top: 0; border-bottom: 1px solid var(--line); }
footer.foot { max-width: 1180px; margin: 0 auto; padding: 0 16px 32px; color: var(--muted); font-size: 13px; }
nav.pager.first a[rel] { display: none; }
@media (min-width: 900px) { aside.chapters { display: block; } nav.pager.first { display: none; } }