wrapper">
      {% include topbar.html %}
      <div id="main">

        {% capture _content %}
          {{ content }}
        {% endcapture %}

        {% include fixlinenos.html %}
        {{ _content }}

        {% include footer.html %}
      </div>
      {% include search-results.html %}
    </div>

    <div id="mask"></div>

    <a id="back-to-top" href="#" class="btn btn-lg btn-box-shadow" role="button">
      <i class="fas fa-angle-up"></i>
    </a>

    {% include mathjax.html %}

    {% if jekyll