body {
    font-family: Arial, sans-serif;
    padding: 20px;
}

#card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

#transaction-form {
    margin-top: 20px;
}

#card {
    border: 1px solid #ccc;
    padding: 10px;
    margin-top: 20px;
}