How to apply CSS to pn.pane.HTML?

[ahuang11]

For reference:

How do I use CSS to modify Panel widgets' style like fontsize and color?

A more complex example: [image] Ignore div Prefix with periods if there’s a div prefix Add spaces in between .bk.card .bk.card-header .bk.card-header-row .bk.card-title .bk.bk-clearfix { font-size: 2em; }

https://panel.holoviz.org/how_to/styling/apply_css.html#stylesheets