Super cool! Thanks for sharing.
I might have missed this in your explanation, but what do you use for the stylized giant capital leaders that start new pages?
It's a typography feature called a Drop Cap. Since I'm using Homebrewery, there is a specific snippet for it. You wrap the first letter of the paragraph in curly brackets like this: {{drop-cap G}}.
Under the hood, the CSS is just targeting that specific letter to make the font size massive and floating it to the left so the rest of the text wraps around it.