Retro Pop Art Blueberry Shake Poster

Create a bold retro pop-art poster for a {argument name="dessert shake" default="Blueberry Dessert Shake"}.\nUse a thick blueberry shake in a transparent glass with dripping syrup, whipped cream swirl, blueberries, mint leaf, and a colorful straw.\n\nTheme: {argument name="theme" default="90s retro diner poster"}\nColors: bright magenta, electric blue, cream, purple, hot pink\nBackground: halftone dots, vintage paper texture, bold geometric shapes, sticker-style cutout behind the glass\nTypography: huge stacked text saying "{argument name="main title" default="BLUEBERRY BLAST"}", with smaller text "COLD. SWEET. CREAMY."\nThe text should wrap around the shake with a fun diner-style design.\nMake it bold, playful, high contrast, realistic but with retro printed poster texture.\nAdd glossy syrup, realistic whipped cream, fresh berry details, and strong commercial lighting.