I saw there was a recent change in the code (2024-09-15) to use CSS for rounded corners for @cartouche. They look as in the attached file "rounded-percent.png". As you can see the rounding is not symmetrical and is very stylised, which goes against the bland non-opinionated style that we have by default. This is with "border-radius: 10%". I expect it looks like this because 10% of the height is different to 10% of the width so we do not get circular arcs at the corners.
It would be better not to have rounded corners at all, as with the old output "cartouche-borders.png". Alternatively, using an absolute value, such as "border-radius: 10px" produces a better result: see "rounded-pixels.png". "border-radius: 0.5em" may be better as this should depend on the font size: see "rounded-em.png".
