/* Ensure the .toc-h3 elements are hidden by default */

.toc-h3 {
  display: none;
}

/* Make the .toc-h3 elements visible when their parent or they themselves are hovered */
.toc-h2:hover .toc-h3,
.toc-h2:focus-within .toc-h3,
.toc-h3:hover {
  display: block;
}