{# Mooring-diagram PDF embed.  The `diagram` panel payload (kind="html");
   applies_to gates on diagram_b64 being present. #}
<embed src="data:application/pdf;base64,{{ diagram_b64 }}"
       type="application/pdf" width="100%" height="850px"
       style="border:1px solid var(--rule);border-radius:4px;display:block;">