matrix.org/templates/shortcodes/page_card.html

<div class="page_card">
    <a href="{{ path }}" alt="Link to {{ title }}">
        <div class="wrapper">
            <div class="card_content">
                <h4>{{ title }}</h4>
                <p>{{ summary }}</p>
            </div>
            <div class="arrow"></div>
        </div>
    </a>
</div>