#overlayLoader {
    position: absolute;
    z-index: 10000000;
    text-align: center;
    display: none;
    width: 100%;
    height: 100%;
    padding: 100px 0 0 0;
    background: rgba(255,255,255,.5);
}

#overlayLoader > span {
    display: inline-block;
    width: 64px;
    height: 64px;
    z-index: 10000001;
    position: relative;
    background-image: url("/typo3conf/ext/pxc_template_uestra/Resources/Public/Vendor/overlayLoader/src/loader.gif");
}