body{font-family:Arial,sans-serif;background:#111;color:#fff;margin:0}header{display:flex;justify-content:space-between;padding:20px;background:#1a1a1a}.hero{padding:80px 20px;text-align:center}.btn{background:#d00;color:#fff;padding:12px 20px;text-decoration:none;border-radius:8px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;padding:20px}.card{background:#222;padding:20px;border-radius:10px}