{% comment %}
Logo cloud (04-interfaces.md section 4d): a "trusted by" logo row/grid.
Structural, consumed via {% include %} (BR-BW-MKT §4d structural-include
doctrine).

Required context:
  logos (list of dicts): {src, alt}. alt is required per the a11y non-goal
        that an image is never unlabelled: a caller supplying a decorative-
        only alt="" is a deliberate choice it makes itself, but this
        component never invents an empty alt on the caller's behalf.

Optional context:
  heading   (str, e.g. "Trusted by teams at").
  greyscale (bool, default False): a CSS greyscale-until-hover treatment,
            purely decorative, never the sole signal of anything.

An empty (or omitted) logos list renders the heading alone (or nothing, if
that too is empty), never a fabricated placeholder logo.
{% endcomment %}
{% if heading or logos %}
<section class="bw-logo-cloud{% if greyscale %} bw-logo-cloud--greyscale{% endif %}">
  {% if heading %}<p class="bw-logo-cloud__heading">{{ heading }}</p>{% endif %}
  {% if logos %}
    <div class="bw-logo-cloud__grid">
      {% for logo in logos %}
        <img class="bw-logo-cloud__logo" src="{{ logo.src }}" alt="{{ logo.alt }}">
      {% endfor %}
    </div>
  {% endif %}
</section>
{% endif %}