.cd-top {
    background: rgba(239, 202, 8, 0.8) url("../img/cd-top-arrow.svg") no-repeat scroll center 50%;
    bottom: 40px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
    display: inline-block;
    height: 40px;
    opacity: 0;
    overflow: hidden;
    position: fixed;
    right: 20px;
    text-indent: 100%;
    transition: opacity 0.3s ease 0s, visibility 0s ease 0.3s;
    visibility: hidden;
    white-space: nowrap;
    width: 40px;
}

.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;
}
.no-touch .cd-top:hover {
  background-color: rgba(0, 0, 0, 1);
  opacity: 1;
}
@media only screen and (min-width: 768px) {
  .cd-top {
    right: 20px;
    bottom: 20px;
  }
}
@media only screen and (min-width: 1024px) {
  .cd-top {
    height: 60px;
    width: 60px;
    right: 30px;
    bottom: 30px;
  }
}