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