Cozy UI is what you get when someone takes old-school computer windows and draws them by hand. Thick outlines. Warm colors. The kind of design that makes people actually want to open your app.
You know when you open an app and it just feels... nice? Like someone actually thought about how it would feel, not just how it would work. That's Cozy UI. It takes the shapes of early-2000s computers — the dialog boxes, the browser tabs, the little folder icons — and wraps everything in a warm peach-and-brown color palette that feels like a rainy afternoon. Every button has a thick outline. Every card has a hard little shadow. Nothing looks machine-generated. It looks made by hand.