#card-container {
    border: 1px solid #ccc;
    padding: 10px;
    border-radius: 8px;
}

#submit {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #0070f3;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#submit:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

#error {
    color: red;
    margin-top: 10px;
}

#success {
    color: green;
    margin-top: 10px;
}