HTML is for marking up the semantics of content - lists, headings, emphasis, etc… CSS is for presentation - how is appears in the target medium. The layout is 1

HTML is for marking up the semantics of content - lists, headings, emphasis, etc… CSS is for presentation - how is appears in the target medium. The layout is 100% visual presentation and 100% belongs where it is, in CSS. Dealing with multiple screen/windows/paper sizes, as well as dynamic resizing & scaling is incredibly hard or impossible when you've baked a fixed idea of presentation into your content, see: Latex, PDFs & old school HTML with complex tables for layout, for examples.