<nav class=“main-nav” role=“navigation”>

<h2 class="main-nav__title">
  {{ site.data.i18n[site.locale].nav_title | default: 'Main navigation' }}
</h2>

<ul class="main-nav__options">
  {% assign pages         = site.pages | where: 'layout', 'page' %}
  {% assign articles_page = site.pages | where: 'layout', 'articles' %}
  {% assign pages = pages | concat: articles_page %}

  {% if site.nav %}
    {% assign external_pages = site.nav %}
    {% assign pages          = pages | concat: external_pages %}
  {% endif %}

  {% for menu in pages %}
    {% if menu.resource == true %}
      <li class="main-nav__item">
        <a href="{{ menu.permalink | absolute_url }}">{{ menu.title }}</a>
      </li>
    {% endif %}
  {% endfor %}
</ul>

</nav>