I have received negative feedback (and I agree with it) on the current state of breeze shadows: they are quite dark, narrow, and feel unnatural. I tried to adress that by making shadows more sparse and a bit lighter especially on the angles while trying to keep it distinguishable when on white background. I received some positive feedback on these shadows from T10891 and the VDG channel. More specifically, I changed dialogs/background.svg to have a) longer linear gradients and b) radial gradients instead of linear on the four sides to make the center darker than the angles.