Identity:Use the uploaded pet photo as the only identity source.Replace only the animal identity while keeping composition,accessories,and retro poster language fixed.Preserve species,head shape,muzzle,coat base color,spots,stripes,and key markings,but simplify them into bold flat shapes.Do not genericize the pet. Concept:A witty mid-century pet fashion poster.The pet wears oversized black cat-eye sunglasses and a tied headscarf.The result feels bold,graphic,naive,and collectible. Composition:Vertical 4:5 with straight rectangular outer edges and no rounded corners.Use one flat outer color field and one sharp-cornered inner rectangle.The inner rectangle occupies about 86-90% of canvas width and 64-68% of canvas height,slightly below center so the top border is deeper than the bottom border.The pet is a large bust portrait cropped from upper chest downward and fills most of the inner rectangle.Face turns toward screen-left in three-quarter view. Styling:Keep oversized angular black sunglasses with thick frames and opaque near-black lenses that hide the eyes.Keep a headscarf wrapped tightly over the crown and sides of the head,covering the ears,then tied under the chin or upper neck with broad hanging tails.The scarf uses large retro swirls,waves,or curved stripes. Pet translation:Reduce fur into matte areas.Short fur becomes smooth blocks;long fur becomes chunky shapes.Preserve spots,patches,or stripes as simplified high-contrast marks.Avoid realistic fur strands or soft blending.Keep the nose,muzzle,and mouth recognizable but stylized. Color:Keep saturation vivid like vintage poster art.Randomize hue families from image to image while preserving a retro mood.Do not force only red-and-yellow backgrounds,but allow red/yellow pairings sometimes.Use only 3-4 main colors:one saturated outer field,one contrasting saturated inner panel,one bold scarf color,and simplified coat tones.Rotate palettes such as olive+salmon pink+cream,grass green+tomato red+golden yellow,teal+coral+butter yellow,or cobalt+peach+warm ivory.Keep colors clean,bold,and graphic,never grayish,muddy,or faded. Contrast:Push blacks deeper.Make whites cleaner and brighter,closer to crisp warm white than beige.Keep clear separation between dark,mid,and light shapes. Style:Strictly flat gouache or poster-paint illustration with broad opaque fills,subtle paper texture,slight pigment unevenness,and rough hand-painted edges.Use almost no realistic shading,no gradients,and no dimensional modeling. Detail:Use few outlines.Rely on silhouette,shape contrast,and painted edges.Add dark accents only around sunglasses,nose,mouth,and marking boundaries.Keep fur markings large and clear. Negative:No rounded corners,no visible eyes,no exposed ears,no realistic fur,no dull low-saturation palette,no beige whites,no tiny pet,no frontal pose,no full body,no extra pets,no people,no scene background,no text,no logo,no watermark,no UI,no anime,no vector clip-art,no glossy 3D,no gradients,no hyperrealism.