#main-loading{background-color:#508dca;position:relative;}#main-loading #app-loading{position:absolute;background-repeat:no-repeat;top:50%;left:50%;transform:translate(-50%,-50%);}#main-loading #loading-gif{position:absolute;background-image:url('images/predefined_loading_1.gif');background-repeat:no-repeat;width:58px;height:29px;top:50%;left:50%;transform:translate(-50%,-50%);}