Can't change answer format

I’d like to change the font for the back of the card but nothing I do seems to work. I’ve created a CSS id tag that works on the front, but it doesn’t work on the back. Here’s what I’m doing: (note that I had to replace <> with Z to get the html code to appear in this question)

On Styling tab:
#yiddish { font-family: David; font-size: 35px; direction: rtl; }

On front template (this works):
Zspan id="yiddish"> {{type:Item_in_Yiddish_Script}} </spanZ

On back template (doesn’t work):
{{FrontSide}} Zhr id=answerZ Zspan id="yiddish">{{type:Item_in_Yiddish_Script}}</spanZ