{%- comment -%}
  static-design-system — footer.html
  Shared footer (chrome). Place inside a .shell.
  Uses site.author, optional site.author_url (links the name), and optional
  site.footer_years (e.g. "2025–2026").
{%- endcomment -%}
<footer class="foot">
  <span>&copy; {% if site.author_url %}<a href="{{ site.author_url }}">{{ site.author }}</a>{% else %}{{ site.author }}{% endif %}{% if site.footer_years %} {{ site.footer_years }}{% endif %}.</span>
</footer>