.back-to-top {
  z-index: 101;
  position: fixed;
  right: 16px;
  bottom: 10vh;
  width: 40px;
  height: 40px;
  color: var(--color-top-button-text-color);
  background-color: var(--color-top-button-bg);
  transform: translateY(200%);
  transition: transform 300ms cubic-bezier(0.455, 0.03, 0.515, 0.955);
}

#top-button {
  display: none;
}

#top-button.show {
  display: flex;
}

@media (min-width: 960px) {
  .back-to-top {
    right: 32px;
    bottom: 100px;
  }
}