Agreed, three cheers to @ChrisDark for this. I searched high and low for this data[] tag to set my custom field values. I have to populated cloned field values…did you ever figure out how to tap into a subfield (which I suspect would use similar syntax)?
Thanks, I took your advice and just injected the CSS into my main file. I also had to include a JS file so used your suggestion if looking for the presence of the field value which seems to work well.