#back-to-top{position:fixed;bottom:40px;right:0;z-index:9999;padding:.5em .8em;text-align:center;line-height:30px;background:#fff;color:#497e89;cursor:pointer;border:0;border-radius:2px 0 0 2px;text-decoration:none;transition:opacity .5s ease-out;opacity:0;box-shadow:0 12px 24px 0 hsla(0,0%,40%,.25);z-index:999}#back-to-top img{margin-left:.5em}#back-to-top:hover{background:#f2f2f2}#back-to-top.show{opacity:1}