Proposal from 2016 (closed): https://github.com/w3c/csswg-drafts/issues/588

With CSS Grid math you can fake it, at least. If your DL is `display: grid;` and if you have a few extra DIVs lying around at the bottom of the DL to be borders around combined cells you just have to math which rows/columns you want to draw a border around and make the div fit that combined shape.

Good idea. Together with ::after / ::before and content: (which can insert text into the website) it might then be possible to create a website without any HTML, only CSS.