Recently I came across the CSS
width property values
max-content. I haven't heard of these before and couldn't imagine when these values would be useful. So I asked Twitter to get some answers. As usual Sven Wolfermann helped me out and sent me a CodePen which showed when I'd want to use these values.
As you see in the CodePen example the subline is controlling the overall width of the headline. If you would have asked me a month ago I'd probably would have said that this is not possible in CSS.
I never had to build a layout like this, but good to know that it's possible. ;)