#chapters-shortcode .chapter { margin-bottom: 12px; }
#chapters-shortcode .chapter-title {
  cursor: pointer;
  background: #f4f4f4;
  padding: 8px 12px;
  border-radius: 6px;
  font-weight: 600;
}
#chapters-shortcode .sections {
  display: none;
  margin: 8px 0 0 10px;
  padding-left: 16px;
  list-style: disc;
}
#chapters-shortcode .sections li { margin: 6px 0; }
#chapters-shortcode .sections a { text-decoration: none; }