HTML is marking up the meaning of the document. You should start there. Then style with CSS.

This is precisely how I do it.

Code that generates HTML. Once I can see all the content on the screen in some kind of Netscape Navigator 1.0 nightmare, then I go back and add styles to make it look pretty.

It's not hard. It just requires thought and planning.

(The best planning tool I've found is a pencil and grid paper, not the web design SaaS-of-the-moment. However, it's surprisingly hard to find good pencil sharpeners these days.)