#backToTop {
  display: none;
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 9999;
  background-color: #336699; /* dark blue */ /* #444; */
  color: white;
  border: none;
  padding: 10px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

#backToTop:hover {
  background-color: #222;
}