How do I stop my AI-generated UI from looking generic?

AI tools output the statistical average of every dashboard they trained on, which is why everything comes out with the same rounded cards, Inter font, and blue gradients. The fix is to stop asking one prompt to do taste, exploration, and code at once: write down your own design system (colors, type, spacing, radius) in a file like DESIGN.md the tool must follow, plan the creative direction in text first, and learn a handful of visual rules so you can spot and fix the highest-impact flaw each iteration. Distinctive design is now a real moat precisely because everyone else ships the default.