You have to add it to the pane files in the output manually. Yes it is possible if you're up for hacking the output files.
I thought so. I'll have to give it a try. Do you think it'll be as easy as just adding the @import CSS to whtdhtml.htm (TOC), whfdhtml.htm (FTS), whidhtml.htm (IDX), and whgdhtml.htm (GLO)?
It's slightly more work than that. I would recommend creating a CSS with the rule in it. Use !important to overwrite existing styling. The TOC et al are styled by the scripts that insert inline styling. And you'll need to overwrite that.
Then you can assign the CSS to the files. But there are more that the whxdhtml ones. You want:
Thanks Willam, I'll give it a try.