Minimalist Banner via Gemini AI

I’d like a clean, uncluttered website banner for my online shop created with Gemini-powered image generation. The look should be unmistakably minimalist—ample negative space, restrained colour palette, and simple geometric balance. I don’t want any text or overlay; the visual alone must convey a modern, sophisticated feel that fits naturally across the top of an e-commerce home page.

Because it will serve as the main banner, I’m aiming for a final file that is lightweight yet crisp on both desktop and mobile. If you normally work at a standard 2:1 ratio (for example 1920 × 960 px) that’s perfect; feel free to recommend another size if you have better responsive tricks.

Please handle the entire creative process inside Gemini (prompt engineering, variations, upscaling) and deliver:

• A high-resolution PNG (and layered source if available)
• One optimised JPG under 300 KB for web use
• A brief note on the exact prompt(s) you used so I can iterate later

Let me know early if you foresee any colour or layout constraints I should consider. I’m ready to choose quickly and move forward as soon as I see a concept that nails that minimalist vibe.