.back-to-top{background-color:#1480df;position:fixed;width:50px;height:50px;color:#fff;border-radius:100%;bottom:14%;right:40px;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;font-size:21px;opacity:0;visibility:hidden;cursor:pointer}.back-to-top.active{opacity:1;visibility:visible}