hey there! I (@vogon) was gonna do a more playful post about this, but this bit from @amydentata and @aune is funnier than anything I could've posted anyway.
https://cohost.org/aune/post/3603446-span-style-color
you can now change the post box to be darker to make the site less glaring -- particularly on mobile devices, where the post box takes up almost all of your screen and people made a fair point that our "dark" theme isn't particularly dark in practice.
hi folks!
we just rolled out some changes that include a full rewrite of how we manage themes, which had the unfortunate side effect of breaking popular userstyles like the theme customizer.
userstyle and userscript developers will be happy to learn that we now have semantic classes instead of a horrible mismash of tailwind classes that are impossible to target.1
we'll be expanding this theme infrastructure to other parts of the site as we go as we move closer to native customizable themes. we know it's inconvenient for now, but it's necessary for improvements down the road.
please let us know if you're seeing any issues! 
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if you don't know what this means, don't worry about it; it's not important for normal usage of the site.
this is why it really pays off to have devs that play well with 3rd party additions. also, i'm really glad i haven't tried updating my purple theme yet. ^,..,^