body{font-family:Arial,sans-serif;margin:0;color:#222;line-height:1.6}header,footer{background:#0f172a;color:#fff;padding:18px}nav a{color:#fff;margin:0 10px;text-decoration:none}.container{max-width:1000px;margin:auto;padding:40px 20px}.hero{background:#2563eb;color:#fff;padding:70px 20px;text-align:center}.card{border:1px solid #ddd;padding:18px;margin:12px 0;border-radius:8px}