{# Rekursives TOC: beliebige Verschachtelungstiefe, eine Quelle der Wahrheit.
   Die Seitenzahl erzeugt .toc-link::after via target-counter(attr(href), page) --
   das href muss dafuer auf dem Element liegen, das die Regel traegt. #}
{% macro toc_entries(nodes) %}
  <ul class="toc-list">
    {% for node in nodes %}
      {% if node.is_part %}
        <li class="toc-item toc-item-part">
          <a href="#{{ node.slug }}" class="toc-link toc-part-link">
            <span class="toc-text toc-part-title">{{ node.title }}</span>
            <span class="toc-leader"></span>
          </a>
          {% if node.children %}
            {{ toc_entries(node.children) }}
          {% endif %}
        </li>
      {% else %}
        <li class="toc-item toc-item-h{{ node.level }}">
          <a href="#{{ node.slug }}" class="toc-link">
            <span class="toc-text">
              {% if node.number %}{{ node.number }} {% endif %}{{ node.title }}
            </span>
            <span class="toc-leader"></span>
          </a>
          {% if node.children %}
            {{ toc_entries(node.children) }}
          {% endif %}
        </li>
      {% endif %}
    {% endfor %}
  </ul>
{% endmacro %}

<section class="toc-page">
  <h1 class="toc-title">{{ labels.toc_title }}</h1>
  {{ toc_entries(toc_tree) }}
</section>