:root{--bg:#fbfaf7;--fg:#1d2329;--muted:#5b6670;--accent:#1f6f6b;--card:#ffffff;--line:#e4e1da}
@media (prefers-color-scheme:dark){:root{--bg:#14181b;--fg:#e7e9ea;--muted:#9aa5ad;--accent:#5fb8b1;--card:#1b2024;--line:#2a3136}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;gap:10px;align-items:center;color:var(--fg);text-decoration:none;font-weight:600}
nav a{color:var(--muted);text-decoration:none;margin-left:20px}
nav a:hover{color:var(--accent)}
.hero{padding:64px 0 24px}
.hero h1{font-size:clamp(28px,4vw,42px);line-height:1.2;margin:0 0 16px;max-width:22ch}
.hero p{color:var(--muted);max-width:60ch;font-size:19px}
section{padding:24px 0}
h2{font-size:24px;margin:0 0 12px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.cards article{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px}
.cards h3{margin:0 0 6px;font-size:17px;color:var(--accent)}
.cards p{margin:0;color:var(--muted);font-size:15px}
footer{border-top:1px solid var(--line);margin-top:48px;padding:24px 0;color:var(--muted);font-size:14px}