@media(max-width: 800px) {
    .os-internal-ui-dialog.os-internal-ui-widget.os-internal-ui-widget-content.os-internal-ui-corner-all.os-internal-Popup.os-internal-ui-draggable {
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: initial !important;
        height: calc(100% - 30px) !important;
        max-width: initial !important;
        margin: 0 !important;
    }
}