{#
  The trail from the value this page serves down to the page itself, climbing
  the one edge each kind of node names as its way up.
#}
{% from "_links.html" import go, kind_dot %}
{% if crumbs %}
<nav class="crumbs" aria-label="Breadcrumb">
  <ol>
  {% for crumb in crumbs %}
    <li>
    {% if crumb.route and (not loop.last or trail_tail is defined) %}
      <a {{ go(crumb.route.split('#')[0], base) }}>{{ kind_dot(crumb.kind) }}{{ crumb.label }}</a>
    {% else %}
      <span aria-current="page">{{ kind_dot(crumb.kind) }}{{ crumb.label }}</span>
    {% endif %}
    </li>
  {% endfor %}
  {% if trail_tail is defined %}
    <li><span aria-current="page">{{ trail_tail }}</span></li>
  {% endif %}
  </ol>
</nav>
{% endif %}