@keyframes spinner{to{transform:rotate(1turn)}}.spinner:after{content:"";box-sizing:border-box;position:absolute;top:50%;left:50%;width:40px;height:40px;margin-top:-20px;margin-left:-20px;border-radius:50%;border:5px solid rgba(180,180,180,.6);border-top-color:rgba(0,0,0,.6);animation:spinner .6s linear infinite}