@keyframes spinner{to{transform:rotate(360deg)}}.spinner:before{content:"";position:absolute;top:calc(50% + 4px);left:calc(50% + 4px);width:13px;height:13px;margin-top:-10px;margin-left:-10px;border-radius:50%;border-top-width:2px;border-top-style:solid;border-right:2px solid transparent;animation:spinner .6s linear infinite}