:root{--bg:#f7f8f6;--fg:#1a2420;--muted:#5d6964;--accent:#0d6a5a;--line:#dde3df}
@media (prefers-color-scheme:dark){:root{--bg:#101614;--fg:#e4ebe8;--muted:#9ba8a2;--accent:#5cc4ad;--line:#28322e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif;padding:0 16px}
main{max-width:720px;margin:0 auto;padding:48px 0 64px}
h1{font-size:2rem;line-height:1.2;margin:0 0 8px}
h2{font-size:1.2rem;margin:32px 0 8px}
p,li{color:var(--fg)}
.muted{color:var(--muted)}
a{color:var(--accent)}
nav{display:flex;gap:18px;flex-wrap:wrap;padding:18px 0;border-bottom:1px solid var(--line);max-width:720px;margin:0 auto;font-size:15px}
nav a{text-decoration:none}
footer{max-width:720px;margin:0 auto;padding:24px 0;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}