.back-to-top-btn {
  padding: 16px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--color-divider);
  position: fixed;
  inset-block-end: var(--gutter);
  inset-inline-end: var(--gutter);
  z-index: 50;
}

@media (max-width: 989px) {
  .back-to-top-btn {
    padding: 12px;
  }
}

.back-to-top-btn .icon-caret {
  width: 24px;
  height: 24px;
}