a.back-to-top{display:none;position:fixed;bottom:20px;right:15px;text-decoration:none;width:32px;height:32px;text-align:center;transition:all .2s ease-in-out;-moz-transition:all .2s ease-in-out;-webkit-transition:all .2s ease-in-out;-o-transition:all .2s ease-in-out;box-shadow:0 0 4px rgba(0,0,0,.14),0 4px 8px rgba(0,0,0,.28);background-color:#fff;z-index:6}a.back-to-top:focus,a.back-to-top:hover{text-decoration:none}a.back-to-top>img{width:32px;transform:rotate(270deg);padding:4px}