:root{--bg:#0f172a;--card:#111827;--text:#e5e7eb;--muted:#9ca3af;--accent:#22c55e;--link:#60a5fa}
*{box-sizing:border-box}
body{margin:0;display:grid;grid-template-columns:260px 1fr;min-height:100vh;background:#0f172a;color:var(--text);font:16px/1.7 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial}
nav{background:#0b1220;border-right:1px solid rgba(255,255,255,0.08);padding:18px;position:sticky;top:0;height:100vh}
nav h1{font-size:18px;margin:0 0 10px}
nav a{display:block;color:var(--text);text-decoration:none;padding:8px 10px;border-radius:8px;margin-bottom:6px}
nav a:hover{background:#0f172a}
main{padding:24px}
.card{background:#111827;border:1px solid rgba(255,255,255,0.08);border-radius:12px;padding:22px;margin-bottom:16px}
h2{margin:0 0 10px}
h3{margin:18px 0 8px}
code,kbd{background:#0b1220;padding:2px 6px;border-radius:6px}
a{color:var(--link)}
ul{margin:8px 0 0;padding-left:22px}
.note{color:var(--muted)}
pre{background:#0b1220;padding:12px;border-radius:10px;overflow:auto}
.footer{color:var(--muted);font-size:13px;margin-top:16px}
/* Table of contents */
.toc{background:#0b1220;border:1px solid rgba(255,255,255,0.08);border-radius:10px;padding:12px;margin-bottom:16px}
.toc h3{margin:0 0 8px}
.toc ul{list-style:disc;padding-left:22px;margin:0}
.toc a{text-decoration:none}