#pre_loader{top:0;left:0;z-index:2000;background-color:rgba(0,0,0,.5);padding:0;margin:0;position:fixed;width:100%;height:100%;display:none}.spinner-container{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}#pre_loader .spinner-container .spinner-border{width:4rem;height:4rem;border:.6em solid #00a0df;border-right-color:transparent}