Now that the popover is portaled to body its backdrop-filter actually samples the content
behind it, so the near-opaque glass-menu (needed only as a workaround while blur was
trapped) made it look solid. Switch it back to the frosty .glass (78%); the working blur
softens the background so text stays readable without the bleed-through. Trapped header
menus (language/notifications) keep glass-menu.
peter
a18924bf97