/* Sidebar readability: higher-contrast collapsible section labels, clearer
 * hierarchy via indentation + a guide line, and comfortable spacing. */

/* Collapsible section labels (top-level groups) read as headings, not faded text */
.md-nav--primary .md-nav__item--nested > label.md-nav__link,
.md-nav--primary .md-nav__item--nested > .md-nav__link {
  font-weight: 700;
  color: var(--md-default-fg-color);
  letter-spacing: -0.005em;
}

/* Leaf links: a touch more contrast than Material's default muted grey */
.md-nav--primary .md-nav__link {
  color: var(--md-default-fg-color--light);
  line-height: 1.45;
}
.md-nav--primary .md-nav__link:hover,
.md-nav--primary .md-nav__link:focus {
  color: var(--md-accent-fg-color);
}
/* Current page stays clearly highlighted */
.md-nav--primary .md-nav__link--active,
.md-nav--primary .md-nav__link[aria-current="page"] {
  color: var(--md-accent-fg-color);
  font-weight: 600;
}

/* Indent nested items under a section and draw a subtle guide line */
.md-nav--primary .md-nav__item--nested .md-nav__list {
  margin-left: 0.55rem;
  padding-left: 0.7rem;
  border-left: 1px solid var(--md-default-fg-color--lightest);
}

/* A bit of breathing room between items */
.md-nav--primary .md-nav__item {
  padding-top: 0.05rem;
  padding-bottom: 0.05rem;
}