body{margin:0;font-family:Arial,sans-serif;background:#f5f7fa}.container{max-width:1100px;margin:auto;padding:20px}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 4px 12px #00000014;transition:.3s}.card:hover{transform:translateY(-4px)}button{padding:8px 14px;border-radius:6px;border:none;cursor:pointer}.btn-primary{background:#3498db;color:#fff}.btn-primary:hover{background:#2980b9}h2{margin-bottom:15px}