.cd-top {

  display: inline-block;

  height: 60px;

  width: 60px;

  position: fixed;

  bottom: 40px;

  right: 10px;

  box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);

  /* image replacement properties */

  overflow: hidden;

  text-indent: 100%;

  white-space: nowrap;

  background:url(../images/btn_top.png) no-repeat center 50%;

  visibility: hidden;

  opacity: 0;

  -webkit-transition: all 0.3s;

  -moz-transition: all 0.3s;

  transition: all 0.3s;

}

.cd-top.cd-is-visible {

  /* the button becomes visible */

  visibility: visible;

  opacity: 1;

}

.cd-top.cd-fade-out {

  /*