<!DOCTYPE html> <html lang=“{{ page.lang | default: site.lang | default: 'en' }}”>

{% include head.html %}
<body>
  <div class="container">
    {% include header.html %}

    <main>
      {{ content }}
    </main>

    {% include footer.html %}
  </div>

  {% if page.math %}
    {% include mathjax.html %}
  {% endif %}

  {% if jekyll.environment == 'production' and site.google_analytics %}
    {% include google-analytics.html %}
  {% endif %}
</body>

</html>