.cd-top {
 display: inline-block;
 position: fixed;
 bottom: 20px;
 right: 20px;
 width: 50px;
 height: 50px;
 overflow: hidden;
 text-decoration: none;
 background: rgba(0,0,0,0.4);
 visibility: hidden;
 opacity: 0;
 color: #fff;
 -webkit-transition: opacity .3s 0s, visibility 0s .3s;
 -moz-transition: opacity .3s 0s, visibility 0s .3s;
 transition: opacity .3s 0s, visibility 0s .3s;
 border-radius: 50%;
 font-size: 50px;
 font-weight: bold;
 z-index: 99999999;
}
.cd-top.cd-is-visible, .cd-top.cd-fade-out, .no-touch .cd-top:hover {
 -webkit-transition: opacity .3s 0s, visibility 0s 0s;
 -moz-transition: opacity .3s 0s, visibility 0s 0s;
 transition: opacity .3s 0s, visibility 0s 0s;
}
.cd-top.cd-is-visible {
 /* the button becomes visible */
 visibility: visible;
 opacity: 1;
}
.cd-top.cd-fade-out {
 /* if the user keeps scrolling down, the button is out of focus and becomes less visible */
 /*opacity: .5;*/
 /*background: rgba(255,255,255,0.5);*/
}
.no-touch .cd-top:hover {
 background-color: #e86256;
 opacity: 1;
}