:root{--bg:#fafaf8;--fg:#1d1d1b;--muted:#5d5d58;--line:#e2e1dc;--accent:#2457a6}
@media (prefers-color-scheme:dark){:root{--bg:#151514;--fg:#ecebe6;--muted:#a3a29b;--line:#2f2f2c;--accent:#8fb3ec}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:680px;margin:0 auto;padding:48px 20px 64px}
h1{font-size:1.7rem;margin:0 0 .3em}
h2{font-size:1.1rem;margin:2em 0 .4em}
p,li{color:var(--fg)}
.lead{color:var(--muted);margin-top:0}
nav{margin-top:3em;padding-top:1em;border-top:1px solid var(--line);font-size:.9rem}
nav a{color:var(--accent);margin-right:1.2em}
small{color:var(--muted)}