.spinner{display:block;position:relative}.spinner>span{border:4px solid;border-top-color:transparent;border-radius:30px;animation:1s linear infinite spin;position:absolute;top:0;bottom:0;left:0;right:0}.size-sm.spinner span{border-width:2px}.size-sm.spinner{width:20px;height:20px}.size-md.spinner{width:30px;height:30px}.size-xl.spinner{width:45px;height:45px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(1turn)}}