#spinner{visibility:hidden;width:40px;height:40px;border:2px solid #f3f3f3;border-top:3px solid #f25a41;border-radius:100%;position:absolute;top:0;bottom:0;left:0;right:0;margin:auto;animation:spin 1s infinite linear}@keyframes spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}#spinner.show{visibility:visible}