I do miss the javadoc summary tables, they're a feature that rustdoc is sorely lacking. I don't think this can really be emulated with CSS, maybe approximated a bit.
Javadoc Summary tables:
- responsive layout - from portrait smartphone to fullscreen landscape desktop
- mostly one line per item / consistent vertical space consumption
- arguments and return types are separated, making it easy to scan for a matching signature
- displays the first line of the doc comment
Rustdoc collapsed mode:
- only designed for narrow displays
- horizontally jagged (no alignment)
- vertically jagged (where clauses)
- sometimes witches argument layout from horizontal to vertical
- need to click to get even the summary
Both are bad when it comes to displaying trait/supertype methods. In javadoc it's just a bunch of lists without details, in rustdoc the methods are there but it's even less readable than the collapsed inherent method list because one has to first expand everything to see trait methods.