:root {
  --chapter-parent-color: #646f1b;  
  --chapter-parent-expanded: #50a4ed;
}

@media (prefers-color-scheme: dark) {
  :root {
    --chapter-parent-color: #cfd8a5;
    --chapter-parent-expanded: #82c7ff;
  }
}

.chapter li.chapter-item > div {
  color: var(--sidebar-active);
  font-weight: 500;
}

.chapter li.chapter-item.expanded > div {
  color: var(--chapter-parent-expanded);
  font-weight: 700;
}

.chapter li.chapter-item > div > strong[aria-hidden="true"],
.chapter li.chapter-item > a > strong[aria-hidden="true"] {
  display: none;
}