#custom-payment-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
}

#modal-content {
    background: white;
    padding: 20px;
    width: 50%;
    margin: 10% auto;
    border-radius: 10px;
}

#close-modal {
    font-size: 20px;
    color: red;
    cursor: pointer;
    position: absolute;
    top: 10px;
    right: 10px;
}