A few thoughts and questions for you (you may have already thought of/know about):
- Have you thought about "well-formedness" for the HTML? I realize that adding anything besides the script tag would sort of ruin your point, and it would be nice if browsers accepted that, but also I feel there are sometimes hidden benefits to serving a well-formed document under the correct content type that the server said was being sent (or extension).
- This makes your site awesome to read with a text browser or curl.
- About 1/2 or 1/3 of the times I click "back" or "next", I can't scroll the page after it renders. (Chrome/MacOS)
- The footer support is cool, have you thought about how you would do more extensive template support? (Maybe there's no reason anything extra couldn't be placed in the footer -- analytics, even a header -- although I think a favicon might need to be in a `<head>` tag). Integrating this directly with Markdown, too, could be really cool.
- P.S. Your footer link says "Chanpter" :)
Great work, I love when I find something like this -- really clean, simple, and challenges the norms in a clever way. The result even appears quite polished.