@keyframes spinner{to{transform:rotate(360deg)}}.spinner{position:relative}.spinner:before{content:"";box-sizing:border-box;border:2px solid #ccc;border-top-color:#000;border-radius:50%;width:20px;height:20px;margin-top:-10px;margin-left:-10px;animation:.6s linear infinite spinner;position:absolute;top:50%;left:50%}
dialog{border-radius:.5rem;margin:auto;box-shadow:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05)}dialog::backdrop{background-color:rgba(0,0,0,.6)}