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

#popup-checkout-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
    height: 90%;
    margin: 2% auto;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
}

#popup-checkout-frame {
    width: 100%;
    height: 100%;
    border: none;
}

#popup-close {
    position: absolute;
    top: 10px; right: 15px;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    z-index: 99999;
}