/* Left sidebar: quiet section headers, tree guides, minimal highlight. */

/* Top-level sections read as small uppercase labels instead of heavy links. */
.md-sidebar--primary .md-nav__item--section > .md-nav__link {
  color: var(--md-default-fg-color--light);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Nested levels get a subtle guide line, like a file tree. */
.md-sidebar--primary .md-nav__item > .md-nav {
  margin-left: 0.7rem;
  border-left: 0.05rem solid var(--md-default-fg-color--lightest);
}

.md-sidebar--primary .md-nav__link {
  transition: color 0.15s ease;
}

.md-sidebar--primary .md-nav__link:hover,
.md-sidebar--primary .md-nav__link--active {
  color: var(--md-accent-fg-color);
}

/* Current page: accent text only, slightly stronger weight. */
.md-sidebar--primary .md-nav__link--active {
  font-weight: 600;
}