@keyframes spinner{to{transform:rotate(1turn)}}.spinner:before{content:"";box-sizing:border-box;position:absolute;top:50%;left:50%;width:50px;height:50px;margin-top:-10px;margin-left:-10px;border-radius:50%;border-color:#fff rgba(0,0,0,0);border-style:solid;border-width:2px;animation:spinner 1.5s ease infinite}