grav-theme-libretic/templates/modular/contact.html.twig

<div class="modular-row contact {{ page.header.class }}">    
    <div class="g-grid pure-g-r">
        <div id="listing" class="g-block pure-u-2-3">
            {% if config.plugins.simple_form.enabled %}
                {% set simple_form_config = page.header.simple_form ?: config.themes.deliver.simple_form %}
                    {{ simple_form(simple_form_config) }}
                {% endif %}
        </div>
        <div id="sidebar" class="g-block size-1-3 pure-u-1-3">
            {{ content }}
        </div>
    </div>
</div>