#scroll_btn{display:inline-block;background-color:#fff;width:50px;height:50px;text-align:center;border-radius:50%;position:fixed;bottom:30px;right:30px;transition:background-color .3s,opacity .5s,visibility .5s;opacity:0;visibility:hidden;z-index:1000;text-decoration:none}#scroll_btn:after{content:"\f106";font:normal normal normal 14px/1 FontAwesome;font-weight:400;font-style:normal;font-size:2em;line-height:44px;color:#000}#scroll_btn:hover{cursor:pointer}#scroll_btn:active,#scroll_btn:hover{background-color:#f9f9f9}#scroll_btn.show{opacity:1;visibility:visible}