.chapter-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-white);
  border-bottom: 1px solid var(--light-border);
}

.chapter-nav__inner {
  display: flex;
  gap: 32px;
  overflow-x: auto;
  padding: 16px 0;
}

.chapter-nav__link {
  font-size: 14px;
  font-weight: 600;
  color: var(--light-text-secondary);
  white-space: nowrap;
}

.chapter-nav__link--active {
  color: var(--color-blue);
}