body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    color: #fff;
}

.card {
    background: rgba(255,255,255,0.05);
    padding: 20px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

.btn-premium {
    background: linear-gradient(45deg, #00c6ff, #0072ff);
    border: none;
    padding: 10px 20px;
    border-radius: 30px;
    color: #fff;
    cursor: pointer;
}