.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;
}
.cd-top:hover {
    opacity: 0.8;
}
.cd-top {
    bottom: 30px;
    height: 60px;
    right: 30px;
    width: 60px;
}
.cd-top {
    bottom: 20px;
    right: 20px;
}
.cd-top {
    background: url('../img/cd-top-arrow.png') no-repeat scroll center 50% rgba(0, 131, 162, 1);
    bottom: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
    display: inline-block;
    height: 40px;
    opacity: 0;
    overflow: hidden;
    position: fixed;
    right: 10px;
    text-indent: 100%;
    transition: opacity 0.3s ease 0s, visibility 0s ease 0.3s;
    visibility: hidden;
    white-space: nowrap;
    width: 40px;
    z-index: 10;
}
a .cd-top{
    color: #f8f8f8;
    text-decoration: none;
}