Clean SaaS-style thumbnail for an AI Shirt Design Generator tool. Layout: a neat 3×3 grid of rounded…

"Clean SaaS-style thumbnail for an AI Shirt Design Generator tool. Layout: a neat 3x3 grid of rounded cards, each card showing a realistic full-body human model wearing a plain t-shirt with a different graphic design and color. Models are diverse in age, gender, and ethnicity, standing in natural, relaxed poses, facing forward. Visual style: modern, friendly, premium SaaS aesthetic with soft shadows, rounded corners, and balanced spacing between cards. Background: soft light blue gradient, clean and minimal. Title text at the top: “AI Shirt Design Generator” in a bold, modern sans-serif font, dark color, high contrast, no outline, no effects. Overall look: professional, approachable, clearly communicates a t-shirt design tool. Photorealistic style for models and shirts, not illustration, not cartoon. No logos, no watermarks, no clutter."