.back-to-top{align-content:center;bottom:20px;cursor:pointer;display:none;height:45px;padding:10px;position:fixed;right:20px;transition:all .3s ease;width:45px;z-index:999}.back-to-top svg{left:50%;position:absolute;transform:translate(-50%,-50%)}.back-to-top:hover{transform:scale(1.1)}.back-to-top.show{display:block;opacity:1}.back-to-top.hide{opacity:0;transition:opacity .3s ease}