#toTop {
  position: fixed;
  z-index: 10;
  right: 20px;
  bottom: 20px;
  display: none;
  cursor: pointer;
  width: 20px;
  height: 20px;
  font-size: 2em;
}
#toTopText {
  white-space: nowrap;
  overflow: hidden;
  text-indent: 100%;
  display: block;
}