Besides other suggestions here, one of my favourites for publishing is orgmode + Latex (https://orgmode.org/manual/Embedded-LaTeX.html#Embedded-LaTeX https://or

Besides other suggestions here, one of my favourites for publishing is orgmode + Latex (https://orgmode.org/manual/Embedded-LaTeX.html#Embedded-LaTeX https://orgmode.org/manual/Embedded-LaTeX.html#Embedded-LaTe...). Org-mode can be thought of as a wrapper around LaTeX. Content in Orgmode is way more human readable than writing entirely in LaTeX. It is great for prototyping, enabling you to get results quick and fast and also plays well with version control. The produced document can also contain Table of contents, cross-references etc. There is also the possibility to generate an intermediate LaTeX file where you can fine tune the typography and layout. To make the most of it though, you will need to learn a bit of LaTeX. Definitely worth a try if someone is looking for something simpler than totally committing to LaTeX, but like me would rather avoid HTML + CSS pain points.