MAI is supposed to have its own design language/brand identity that is unrelated to the overall Microsoft brand. It has its own fonts, logo, colors, etc. The weird thing is that consumer Copilot, which is (or was) developed at MAI (as opposed to business/M365 Copilot which is developed in Redmond and designed based on the regular Microsoft stuff) also has its own design language which is different from the regular Microsoft stuff and different from the MAI stuff.

tbh all of this has always struck me as an ego thing from the MAI team, who are mostly based in Silicon Valley, not Redmond, and think of themselves as too cool for Microsoft