Question
controls Spectrum CSS are diferents from Spectrum UXP components?
is possible to use the Spectrum CSS in a uxp plogin for Photoshop?
Short answer - not really (check the conclusion here)
Long answer - maybe there isn’t one. It’s a bit of a mess with Spectrum and UXP, especially when docs are also a mess in that regard. At least I stick with Spectrum UXP for now. Maybe it will get more customizable at some point