/* Back-to-top button styled to fit Olivero */
.linear-book-back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--color--gray-300, #d3d3d3);
  background-color: var(--color--white, #fff);
  color: var(--color--gray-900, #1a1a1a);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  z-index: 1000;
}

.linear-book-back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.linear-book-back-to-top:hover {
  background-color: var(--color--gray-100, #f6f6f6);
  border-color: var(--color--gray-400, #c5c5c5);
}