body {
    background: linear-gradient(to right, #317589, #422774);
    color: #fff;
    font-family: 'Segoe UI', sans-serif;
    min-height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.card {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}
.btn-primary {
    background-color: #3498db;
    border: none;
}
.btn-success {
    background-color: #2ecc71;
}
.btn-danger {
    background-color: #e74c3c;
}