Specify styling of base-type panel.

<div style="font-family: Dialog; font-size:12pt; border: double 3px #808080; padding: 3px; margin-top:10pt; margin-bottom:10pt">
In case of element component diagram, base-type panel highlights information about the element's type.
<p style="margin-top:10pt">
In case of complex type diagram, base-type panel highlights information about the type's base type.
</div>