body{font-family:Arial,sans-serif;margin:0;background:#071A2E;color:#fff}header,footer{background:#0B2D5B;padding:20px;text-align:center}nav a{color:#fff;margin:0 10px;text-decoration:none}.hero{padding:80px 20px;text-align:center}.btn{background:#2563EB;color:#fff;padding:12px 20px;text-decoration:none;border-radius:6px}.cards{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;padding:30px}.card{background:#102848;padding:20px;border-radius:8px;width:250px}