#page_loader{width:2rem;height:2rem;border:0.1rem solid grey;border-bottom-color:transparent;border-radius:50%;box-sizing:border-box;animation:rotation 1s linear infinite;position:fixed;top:50vh;left:50vw;transform:translate(-1rem -1rem);display:none;z-index:9999}#page_loader.show{display:block}@keyframes rotation{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}