.popup-banner.hidden {
    display: none !important;
}
.popup-banner.shown {
    display: flex !important;
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
}