#back-to-top{position:fixed;right:50px;bottom:50px;background-color:white;transform:rotate(90deg);box-shadow:0 0 5px rgba(0,0,0,0.1);padding:0;width:50px;height:50px;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all .3s}#back-to-top.visible{opacity:100;visibility:visible}#back-to-top:hover,#back-to-top:focus{box-shadow:none;background-color:#004078}#back-to-top:hover .top-arrow,#back-to-top:focus .top-arrow{fill:white}