:root{--bg:#0e1116;--fg:#e6e9ef;--muted:#9aa4b2;--accent:#7aa2f7;--line:#232a36}
@media (prefers-color-scheme:light){:root{--bg:#fafafa;--fg:#14171c;--muted:#5b6573;--accent:#2f5bd8;--line:#e2e5ea}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:48px 16px 64px}
header{border-bottom:1px solid var(--line);padding:20px 16px}
header nav{max-width:720px;margin:0 auto;display:flex;gap:20px;align-items:baseline}
header .brand{font-weight:700;letter-spacing:.04em;margin-right:auto;color:var(--fg);text-decoration:none}
a{color:var(--accent)}
h1{font-size:2rem;margin:0 0 .5rem}
h2{font-size:1.2rem;margin:2rem 0 .5rem}
p,li{color:var(--fg)}
.muted{color:var(--muted)}
footer{max-width:720px;margin:0 auto;padding:24px 16px;color:var(--muted);font-size:.9rem;border-top:1px solid var(--line)}