.spinner{border:2px solid rgba(255,255,255,.3);border-top-color:white;border-radius:50%;width:20px;height:20px;animation:spin .8s linear infinite;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes spin{0%{transform:translate(-50%,-50%) rotate(0deg)}to{transform:translate(-50%,-50%) rotate(1turn)}}