.payment-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
}

.payment-modal.is-open {
    display: flex;
    align-items: center;
    justify-content: center;
}

.payment-modal-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 4px;
    position: relative;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
}

.payment-modal-close {
    position: absolute;
    right: 10px;
    top: 10px;
    cursor: pointer;
    font-size: 24px;
}

#payment-iframe-container iframe {
    width: 100%;
    height: 500px;
    border: none;
}