<div class="mb-3 d-flex flex-column">
    <div class="my-3 text-secondary">The selected activity requires you to open a PDF document from an external website.</div>

    <div>Click the button below to open the requested document in a new browser tab or window.</div>
    <div class="mb-1">To return to this page, switch back to this browser tab, or close the newly opened page.</div>

    {% with block.value as related_page %}
    <a href="{{ related_page }}" target="_blank"
        class="btn btn-primary">Open "{{ page.title }}"</a>
    {% endwith %}
</div>