@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.back-to-top{cursor:pointer;z-index:999;opacity:0;pointer-events:none;background-color:#555;border:2px solid #fff;border-width:0 2px 2px 0;border-radius:30px;-webkit-box-pack:center;-moz-box-pack:center;-ms-flex-pack:center;justify-content:center;align-items:center;width:40px;height:40px;padding:5px 0 0;transition:opacity .15s linear,transform .15s linear;display:flex;position:fixed;bottom:0;right:25px;transform:rotate(-135deg);box-shadow:-1px 2px 5px -3px #00000080;border-width:0!important}.back-to-top.visible{opacity:1;pointer-events:auto;transform:translateY(-25px)}.back-to-top:hover{background-color:#979899}