18F/calc

<div class="styleguide-example">
  <div class="rendering">
    <h3 class="example-heading">
        Example
        <a href="{{ url }}" target="_blank" title="Open in new tab"></a>
    </h3>
    <div class="fullpage-example-wrapper">
      <iframe src="{{ url }}" class="fullpage-example" title="{{ title }}"></iframe>
    </div>
  </div>
  {% if show_html %}
  <pre><code class="language-django">{% filter force_escape %}{{ html }}{% endfilter %}</pre></code>
  {% endif %}
</div>