/* For testing the reachability of RVR-Tiles in real, we load them into a hidden DOM-Element */
#myHiddenContentTestingRVR {
    z-index: -999;
    left: 3000px;
    top: 3000px;
    position: absolute;
}
/* In case the testing needs a while we display a loading animation to let theuser know that something happens. */
#centeredImageForWaitingLoaderAnimation{
    position: absolute;
    width: 24px;
    height: 24px;
    /* original image size = 48px x 48px */
    left: calc(50% - 12px);
    top: calc(50% - 12px);
}