Yeah, that's me, and there are probably some new styling things broken due to how old Jayya is.
Maybe I should hire @Jimmi08 to fix it up someday, but it hasn't been a priority for me.
Yeah, I'm for sure interested in updating and modernizing Jayya. I'm just not a frontend developer at all, so I don't really know how to do it.
But having a theme I care about updated would help inspire me to engineer solutions for improving theming in e107 v3 (my unofficial effort).