Possible RH automation along with custom font?
I've automated the RH of long documents by putting a user-entry box on the pasteboard of the master page. User enters title, lesson number, anything else. This single point of entry gets picked up and placed via text variables. Standard stuff. I like to pick up from this source in case the title needs to get shortened in RHs.
Designer has a new sort of "breadcrumbs" design for the RH.

I made a custom font for the glyphs. Now, how to automate. It's a different strategy from regular pickup RH text variables.
I could, for example, make my custom font so that the "Off Day" (circle number) is a lowercase letter, then define the uppercase as the "On Day" pill. Then they can be changed by changing char style.
But I'm not sure if this can be triggered by a text variable, or grep, or a nested style. I have literally thousands of pages to do this on, so it really needs to be a lightweight, elegant solution. Since I have fellow production colleagues and InCopy editors, having to run a script would be less than ideal, though I suspect that's what it would take.
I've read that GREP cannot swap characters, so applied styles seems the way to change the characters. But I don't know if it's possible to to see the Day Box change and change the char style of a single character. They could be separate variables, but not sure how.
Welcome to any ideas!
