#toTopButton {
  z-index: 99;
  position: fixed;
  right: 10px;
  width: 50px;
  height: 50px;
  border-radius: 25px;
  border: solid 2px #000;
  background-color: #eee;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolygon points='15,55 50,20 85,55 70,70 50,50 30,70' fill='%23000'/%3E%3C/svg%3E");
  cursor: pointer;
  pointer-events: none;
  transform: scale(0);
  transition-property: transform;
  transition-duration: 300ms;
}

#toTopButton:hover {
  transform: scale(1.2);
}