_layouts/main.html

<!doctype html>
<html lang="{{ site.lang | default: "en-US" }}">
    {% include head.html %}
  <body style="padding-top: 3.5rem;">

    {% include navbar.html %}
    {% include masthead.html %}
 
    <div id="container">
      <div class="container">
        <main role="main">
          {{ content }}
        </main>
      </div>
      {% include footer.html %}
    </div>

  {% if site.google_analytics %}
    <script>
        (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
        m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
        })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
        ga('create', '{{ site.google_analytics }}', 'auto');
        ga('send', 'pageview');
    </script>
  {% endif %}
  </body>
</html>