#show-by-scroll-down {
  opacity: 0;
  transition: opacity 500ms ease;
  -webkit-transition: opacity 500ms ease;
}

#show-by-scroll-down a {
  pointer-events: none;
}

#show-by-scroll-down.show-by-scroll-down-visible {
  opacity: 1 !important;
}

#show-by-scroll-down.show-by-scroll-down-visible a {
  opacity: 1 !important;
  pointer-events: auto;
}