{% comment %}
Shared site footer (ADR-113 / BR-BW-TPL-008): family-neutral public footer
landmark with measure, content slot and legal slot. Canonical classes are
.bw-site-footer, __inner and __legal. Docs outer seams consume this include
with .bw-site-* only.

The marketing shell ships the same .bw-site-* classes (4.0.0 closed the
dual-class marketing alias window). Footer link-group composition
(_marketing_footer_groups.html) stays marketing-owned and fills the content
slot when the consumer chooses; it is not part of this shared include.

Django {% include %} cannot expose named blocks to a parent that extends
a shell. The marketing shell keeps marketing_footer, footer_legal and
marketing_footer_region in brickwork_marketing/shell/marketing.html.
Docs typically override docs_site_footer_region with this include so the
landmark is not nested inside .bw-docs-site-footer.

Named blocks (semver-public when {% extends %}d, BR-BW-TPL-001):
  site_footer   consumer-owned footer-content slot (link groups, site map)
  footer_legal  fine-print slot; its wrapper collapses when empty

When both slots are empty the landmark collapses via CSS
(.bw-site-footer:has(.bw-site-footer__legal:only-child:empty)).

States: none.
Accessibility: <footer> landmark; consumer owns link text and grouping.
Responsive: measure + gutter from shell.css; no breakpoint switch of its own.
{% endcomment %}
<footer class="bw-site-footer">
  <div class="bw-site-footer__inner">{% block site_footer %}{% endblock %}<div class="bw-site-footer__legal">{% block footer_legal %}{% endblock %}</div></div>
</footer>