body{margin:0;font-family:Arial,sans-serif;background:#f7f7f7}h1,h2,h3{color:#1a1a1a}.container{width:90%;margin:auto}.btn{padding:10px 20px;border:none;cursor:pointer;border-radius:6px}.btn-primary{background:#0d1b2a;color:#fff}.btn-outline{border:1px solid #0d1b2a;background:transparent}