:root{--bg:#fff;--fg:#1a1d24;--muted:#5b6270;--accent:#1f4fbf;--line:#e4e7ee}
@media (prefers-color-scheme:dark){:root{--bg:#111318;--fg:#eceef3;--muted:#a3aab8;--accent:#7ea2ff;--line:#262a33}}
*{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{max-width:720px;margin:0 auto;padding:32px 16px 64px}a{color:var(--accent)}h1{line-height:1.2}
nav{display:flex;gap:16px;flex-wrap:wrap;padding:16px;border-bottom:1px solid var(--line);max-width:720px;margin:0 auto}
nav a{text-decoration:none;font-weight:600}.muted{color:var(--muted);font-size:14px}.note{border-left:3px solid var(--accent);padding:8px 12px;background:color-mix(in srgb,var(--accent) 8%,transparent)}