web2019/templates/shortcodes/layout_centered_content.html

<div class="{% if css %}{{ css }}{% else %}row d-flex align-items-center mt-5 mb-5{% endif %}">

  <div class="{% if min_width %}col-12 col-md-8 mx-auto{% else %}col-12{% endif %} {% if not force_left %}text-center{% endif %}" style="{% if bg %}{{ bg  }}{% endif %}">

    {% if card %}
    <div class="card shadow py-4 px-3">
      {{ body | markdown | safe }}
    </div>
    {% else %}
      <div>
        {{ body | markdown | safe }}
      </div>
    {% endif %}

  </div>

</div>