<details class="toc-container">
  <summary class="toc-title">Table of Contents</summary>
  <ul class="toc-list">
    {% for h1 in page.toc %}
    <li>
      <a href="{{ h1.permalink | safe }}">{{ h1.title }}</a>
      {% if h1.children %}
      <ul>
        {% for h2 in h1.children %}
        <li>
          <a href="{{ h2.permalink | safe }}">{{ h2.title }}</a>
        </li>
        {% if h2.children %}
        <ul>
          {% for h3 in h2.children %}
          <li>
            <a href="{{ h3.permalink | 