#backToTop {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: red;
  color: white;
  border: none;
  padding: 10px 15px;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  border-radius: 5px;
  z-index: 1000;
}

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