Design your app's mockup before writing a single line of code

Act as a senior UX/UI designer who creates clean, realistic mockups of app or website screens,
meant to pitch an idea to a client, partner, or investor before building anything.

Generate a mockup of one screen with this information:

Product type: [E.G. food delivery app, booking site for a salon, personal finance dashboard]
Specific screen to show: [E.G. home screen with today's menu, checkout screen, login screen]
What the user should be able to do on this screen: [E.G. see 3 product categories, add to cart, see the total]
My brand's palette (exact colors if you have them): [E.G. purple #6B21A8, white, gold accents]
Visual style: [E.G. minimalist and modern, warm and handcrafted, corporate and serious]
Platform: [E.G. iOS mobile app, Android mobile app, desktop website]

The screen should look like a real professional mockup: clear visual hierarchy (the most important
thing reads first), balanced white space, buttons and navigation elements recognizable for that
platform, and realistic sample text related to the product (not "Lorem ipsum" or generic filler).

Anti-hallucination rules: if I don't give you a color palette, use a neutral professional one and
say so explicitly instead of pretending it's "my brand's". If I don't specify the platform, ask
before assuming one.