{# Breadcrumb trail from site root down to current page.
   Walks page.parent_id via the page_ancestors Jinja global (SQL-backed,
   bragi's Page model has no .parent attribute). Each crumb's URL is
   produced by url_for_page. ► separators between items. #}
{% if page %}
  {% set crumbs = page_ancestors(page) %}
  <nav class="breadcrumbs" aria-label="Breadcrumb">
    <ol>
      {% if site %}
        <li><a href="/">{{ site.title }}</a></li>
        <li class="sep" aria-hidden="true">&#x25ba;</li>
      {% endif %}
      {% for crumb in crumbs %}
        <li>
          {% if loop.last %}
            <span aria-current="page">{{ crumb.title }}</span>
          {% else %}
            <a href="{{ url_for_page(crumb) }}">{{ crumb.title }}</a>
          {% endif %}
        </li>
        {% if not loop.last %}<li class="sep" aria-hidden="true">&#x25ba;</li>{% endif %}
      {% endfor %}
    </ol>
  </nav>
{% endif %}