body {
    font-family: 'Segoe UI', sans-serif;
    background-image: linear-gradient(to right, #e0f7fa, #ffffff);
}

.card {
    border-radius: 15px;
}

.card-header {
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
}

.btn-success {
    background-color: #28a745;
}

.btn-success:hover {
    background-color: #218838;
}