.ov-back-to-top {
  position: fixed;
  inset-block-end: var(--ov-space-3);
  inset-inline-end: var(--ov-space-3);
  z-index: 90;
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  color: var(--ov-color-heading);
  background: var(--ov-color-surface);
  border: 1px solid var(--ov-color-border);
  border-radius: var(--ov-radius-2);
  box-shadow: var(--ov-shadow-sm);
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition:
    opacity var(--ov-transition-fast),
    transform var(--ov-transition-fast);
}

.ov-back-to-top::before {
  width: 0.65rem;
  height: 0.65rem;
  border-inline-start: 2px solid currentColor;
  border-block-start: 2px solid currentColor;
  content: "";
  transform: translateY(0.15rem) rotate(45deg);
}

.ov-back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}