:root{--bg:#fff;--fg:#1c1b1f;--muted:#5f6368;--link:#0b57d0;--line:#dadce0;--card:#f6f8fc}
@media (prefers-color-scheme:dark){:root{--bg:#121212;--fg:#e6e1e5;--muted:#a9a9b0;--link:#8ab4f8;--line:#3c4043;--card:#1e1f22}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main,header,footer{max-width:46rem;margin:0 auto;padding:0 1rem}
header{padding-top:1rem}
nav{display:flex;flex-wrap:wrap;gap:.5rem 1rem;padding:.5rem 0}
header nav{border-bottom:1px solid var(--line);padding-bottom:1rem}
a{color:var(--link)}
h1{font-size:1.75rem;line-height:1.25;margin:1rem 0 .5rem}
h2{font-size:1.25rem;margin:1.75rem 0 .5rem}
section{margin-bottom:2rem;padding-top:.5rem}
section+section{border-top:1px solid var(--line)}
code{overflow-wrap:anywhere}
.meta,footer{color:var(--muted);font-size:.9rem}
.note{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:.75rem 1rem}
footer{padding-bottom:2rem;padding-top:1rem;border-top:1px solid var(--line)}