:root{--bg:#f6f4ef;--ink:#1d2230;--muted:#5a6070;--accent:#c4621d;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#15171d;--ink:#eceae4;--muted:#a3a8b4;--accent:#f0955a;--card:#1f222a}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
main{max-width:680px;margin:0 auto;padding:48px 16px 80px}h1{font-size:2rem;line-height:1.2;margin:0 0 8px}h2{font-size:1.15rem;margin:32px 0 8px}
p,li{color:var(--ink)}.muted{color:var(--muted)}a{color:var(--accent)}.card{background:var(--card);border-radius:16px;padding:20px 24px;margin:24px 0}
nav{display:flex;gap:16px;margin-bottom:40px;font-size:.95rem}