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

#gateway-popup-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 0;
    border-radius: 8px;
    overflow: hidden;
}

#gateway-popup-content img {
    width: 100%;
    height: auto;
    display: block;
}

#gateway-popup-close {
    position: absolute;
    top: 5px;
    right: 10px;
    font-size: 26px;
    color: #000;
    cursor: pointer;
}