This is so much fun and great work. On a whim I was curious if I could set the base measurement with a font-size property and do the rest of the math with ems. Here’s the result… as you can see, changing the font size scales it!
edit: I should have set the font-size to the height property and worked from there so the font-size would actually measure correctly to the font. No matter. If someone were to do this for real they can do it right. It’s possible.
Neat, how well does overstrike work?