:root{--bg:#fafaf7;--fg:#22252a;--muted:#6b7280;--accent:#2f6f5e;--line:#e5e7eb}
@media (prefers-color-scheme:dark){:root{--bg:#16181b;--fg:#e8e8e6;--muted:#9aa0a8;--accent:#6fc2a8;--line:#2a2e33}}
*{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}
header,main,footer{max-width:760px;margin:0 auto;padding:0 20px}
header{display:flex;justify-content:space-between;align-items:center;padding-top:28px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.logo{font-weight:700;letter-spacing:.3px;color:var(--fg);text-decoration:none}
nav a{margin-left:18px;color:var(--muted);text-decoration:none}
nav a:hover{color:var(--accent)}
main{padding-top:48px;padding-bottom:48px}
h1{font-size:2rem;line-height:1.25;margin:0 0 16px}
h2{font-size:1.25rem;margin:36px 0 8px}
p{margin:0 0 16px;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin-top:28px}
.card{border:1px solid var(--line);border-radius:10px;padding:18px}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;font-size:.95rem}
.btn{display:inline-block;margin-top:8px;padding:10px 18px;border-radius:8px;background:var(--accent);color:#fff;text-decoration:none}
footer{padding-top:20px;padding-bottom:36px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
footer a{color:var(--muted)}