.card-form {
    max-width: 400px;
    margin: auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#card-element {
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-top: 5px;
}