fmouhart.epheme.re/templates/nav.html

<nav>
  <menu>
    <li><a {% if section and section == root %} class="nav_current" {% endif %} href="/">Home</a></li>
    {% for subsection in root.subsections %}
    {% set subsection = get_section(path=subsection, metadata_only=true) %}
    <li><a href="{{ subsection.permalink }}" {% if section and section == subsection %} class="nav_current" {% endif %}>{{ subsection.title }}</a></li>
    {% endfor %}
  </menu>
</nav>