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