#back-top{position:fixed;bottom:20px;right:10px; z-index:1;}#back-top a{width:108px;display:block;text-align:center;font:11px/100% Arial,Helvetica,sans-serif;text-transform:uppercase;text-decoration:none;color:#bbb;-webkit-transition:1s;-moz-transition:1s;transition:1s;-moz-opacity:.7;-khtml-opacity:.7;opacity:.7}#back-top a:hover{color:#000}#back-top span{width:108px;height:108px;display:block;margin-bottom:20px;background:#ddd url(up-arrow.png) no-repeat center center;-webkit-border-radius:15px;-moz-border-radius:15px;border-radius:15px;-webkit-transition:1s;-moz-transition:1s;transition:1s}#back-top a:hover span{background-color:#777}