Create a wholesome advertising poster for a fictional yogurt brand "BERRY BOOP". FORMAT: 1:1 square, cute playful layout. SUBJECT: an adorable 3D cartoon yogurt-cup mascot with rosy cheeks holding a spoon, fresh berries and creamy swirls bouncing joyfully around it. BACKGROUND: soft pastel pink-to-lavender gradient with sparkles. LIGHTING: bright even cartoon light, creamy glossy highlights. TYPOGRAPHY: bold bubbly logo "BERRY BOOP" top-center, tiny "Scoop of happy" bottom. FINISH: high-detail Pixar-style 3D render, adorable finish.