#return-to-top{
position:fixed;bottom:3.8em;right:.8em;
background:rgba(0,0,0,0.5);width:50px;height:50px;display:block;
text-decoration:none;
 border-radius:35px;
display:none;
-webkit-transition:all 0.3s linear;-moz-transition:all 0.3s ease;-ms-transition:all 0.3s ease;-o-transition:all 0.3s ease;transition:all 0.3s ease;
}
#return-to-top i{
margin:0;
position:relative;top:13px;left:16px;
font-size:19px;color:#fff;
-webkit-transition:all 0.3s ease;-moz-transition:all 0.3s ease;-ms-transition:all 0.3s ease;-o-transition:all 0.3s ease;transition:all 0.3s ease;
}
#return-to-top:hover{background:rgba(0,0,0,1)}
#return-to-top:hover i{top:5px}