#back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  z-index: 9999;
  text-align: center;
  cursor: pointer;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s ease-out;
  opacity: 0;
  -webkit-transition: all 0.25s ease;
  -o-transition: all 0.25s ease;
  background: url('/public/pictures/scroll_arrow_charcoal.svg');
  background-repeat: no-repeat;
  background-size: 50px;
  width: 50px;
  height: 50px;

}

#back-to-top.show {
  opacity: 1;
}
