<nav class="bd-links" id="bd-docs-nav" aria-label="Main navigation">
  <div class="bd-toc-item active">
    {% if pagename.startswith("reference") %}
    {{ generate_nav_html("sidebar", maxdepth=1, collapse=True, includehidden=True, titles_only=True) }}
    {% else %}
    {{ generate_nav_html("sidebar", maxdepth=2, collapse=True, titles_only=True) }}
    {% endif %}
  </div>
</nav>
