:root{--bg:#fafaf9;--fg:#1c1917;--muted:#57534e;--accent:#2563eb;--card:#fff;--border:#e7e5e4}
@media (prefers-color-scheme:dark){:root{--bg:#0c0a09;--fg:#f5f5f4;--muted:#a8a29e;--card:#1c1917;--border:#292524}}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg);line-height:1.6}
a{color:var(--accent)}
header,main,footer{max-width:960px;margin:0 auto;padding:1.5rem 1rem}
header{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}
header .brand{font-weight:700;font-size:1.25rem;text-decoration:none;color:var(--fg)}
nav a{margin-left:1rem;text-decoration:none;color:var(--muted)}
nav a:hover{color:var(--fg)}
.hero{padding:4rem 0 2rem}
.hero h1{font-size:clamp(2rem,6vw,3.25rem);line-height:1.1;margin:0 0 1rem}
.hero p{font-size:1.15rem;color:var(--muted);max-width:40rem}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:.7rem 1.2rem;border-radius:.5rem;text-decoration:none;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:.75rem;padding:1.25rem}
.card h3{margin-top:0}
footer{color:var(--muted);font-size:.9rem;border-top:1px solid var(--border);margin-top:3rem}