:root{--bg:#f4f2ee;--fg:#1a1a1e;--muted:#5d5b57;--card:#fff;--line:#e3dfd8;--accent:#ffc233}
@media(prefers-color-scheme:dark){:root{--bg:#161618;--fg:#f1efea;--muted:#a9a59d;--card:#1f1f23;--line:#33333a}}
*{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:32px 16px 56px}
header{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.mark{width:40px;height:40px;border-radius:10px;background:var(--accent);display:grid;place-items:center;font-weight:800;color:#1a1a1e}
.brand{font-weight:800;font-size:20px;text-decoration:none;color:var(--fg)}
h1{font-size:28px;line-height:1.25;margin:0 0 4px}h2{font-size:19px;margin:28px 0 6px}
p,li{color:var(--fg)}.muted{color:var(--muted);font-size:14px}
a{color:inherit}ul{padding-left:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;margin:16px 0}
nav a{margin-right:16px}footer{margin-top:40px;padding-top:16px;border-top:1px solid var(--line)}