Retro Pop Art Blueberry Shake Poster

A bold 90s-inspired retro diner poster prompt for a blueberry dessert shake featuring vibrant colors and halftone textures.

Create a bold retro pop-art poster for a {argument name="dessert shake" default="Blueberry Dessert Shake"}.
Use a thick blueberry shake in a transparent glass with dripping syrup, whipped cream swirl, blueberries, mint leaf, and a colorful straw.

Theme: {argument name="theme" default="90s retro diner poster"}
Colors: bright magenta, electric blue, cream, purple, hot pink
Background: halftone dots, vintage paper texture, bold geometric shapes, sticker-style cutout behind the glass
Typography: huge stacked text saying "{argument name="main title" default="BLUEBERRY BLAST"}", with smaller text "COLD. SWEET. CREAMY."
The text should wrap around the shake with a fun diner-style design.
Make it bold, playful, high contrast, realistic but with retro printed poster texture.
Add glossy syrup, realistic whipped cream, fresh berry details, and strong commercial lighting.

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