CSS to make FluentBooking work with FluentCommunity light/dark modes?

Has anyone created any CSS that would make FluentBooking automatically switch light/dark mode in sync with the user's selection in FluentCommunity? This would be when using the FB shortcode in a regular WordPress page using the FC theme compatibility page template.
I've played with it for a few minutes and I think it is possible but figured I'd ask here in case someone else has already gotten it figured out.

Thanks!!