Scrollbars look bad with Doxygen v1.9.5
Doxygen v1.9.5 added some webkit scrollbar styling that conflicts with the doxygen-awesome style: https://github.com/doxygen/doxygen/commit/260f2fadf8b780d824cba2e490d119e759ada101
If it's unclear what's broken I'm happy to add some screenshots, but I think it's quite obvious when looking at a generated page, at least on macOS Safari in dark mode.
I've been struggling with the same problem today. Unfortunately it seems like I cannot patch this with pure CSS. 🙁
https://github.com/doxygen/doxygen/issues/9549
As a quick workaround you could maybe modify doxygen.css and remove the lines that define the scrollbar style: https://github.com/doxygen/doxygen/commit/260f2fadf8b780d824cba2e490d119e759ada101
Doxygen 1.9.6 is out and has resolved this issue. Pls consider upgrading to this version, Doxygen 1.9.5 is still not supported by this theme!