*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f5f7fb;color:#111}
.hero{background:#0f172a;color:#fff;padding:42px 18px 36px;text-align:center}
.brand{color:#fff;text-decoration:none;font-weight:800}.hero h1{margin:16px 0 8px;font-size:2rem}
.grid{display:grid;gap:12px;max-width:980px;margin:-24px auto 40px;padding:0 16px}
@media(min-width:800px){.grid{grid-template-columns:repeat(3,1fr)}}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:16px;text-decoration:none;color:inherit;box-shadow:0 8px 18px rgba(15,23,42,.05)}
.nav{margin-top:10px}.nav a{color:#cbd5e1;margin:0 8px;text-decoration:none;font-size:.85rem}
footer{padding:20px;text-align:center;color:#6b7280;font-size:.85rem}