#up-button{display:inline-block;background-color:var(--col-red-1);width:2.5rem;height:2.5rem;text-align:center;border-radius:50%;position:fixed;bottom:75px;right:30px;transition:background-color .3s,opacity .5s,visibility .5s;opacity:0;visibility:hidden;z-index:1000;padding:.35rem}#up-button:hover{cursor:pointer;background-color:var(--col-red-2)}#up-button:active{background-color:var(--col-red-3)}#up-button.show{opacity:.8;visibility:visible}