.preloader{position:absolute;width:100%;height:100%;display:none;background-color:rgba(255,255,255,.7);z-index:1;top:0;left:0}.preloader::before{content:'';background:url(../../img/common/preloader.gif) no-repeat;margin:0 auto;display:block;width:64px;height:64px;position:relative;top:50%;top:calc(50% - (64px / 2))}