<div class="modal-card">
    <div class="modal-card-head">
        <h1 class="title is-3">{% block title %}{% endblock %}</h1>
    </div>
    {% block header %}
    {% endblock %}
    <section class="modal-card-body">
        {% block content %}
        {% endblock %}
    </section>
    {% block footer %}
    {% endblock %}
</div>