#scroll_to_top_button {
  position: fixed;
  bottom: .1vh;
  right: .16vh;
  z-index: 99 !important;
  transition: 0.3s;
}

#scroll_to_top_button img {
  width: 6vh;
  padding: 1vh;
  border-radius: 1vh;
  border: solid .3vh black;
}

#scroll_to_top_button:hover {
  bottom: 20px;
}

#scroll_to_top_button:hover img {
  color: rgb(102, 153, 204);
}