.back-to-top {
  height: 50px;
  width: 50px;
  background: var(--color-lotion);
  z-index: 9;
  right: 2rem;
  bottom: 7rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(30px);
  transition: var(--global-transition);
}
.back-to-top.round {
  border-radius: 50%;
}
.back-to-top.back-to-top--visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0px);
}