Use [Uploaded Person Photograph] only as a private identity and style reference. Keep the person as the only human subject and preserve their face structure, hairstyle, skin tone, and gender presentation. Create a vertical full-body holiday fashion poster: the subject stands in a confident wide stance with both feet grounded, the front shoe closer to the camera for subtle forced perspective, knees slightly bent, hips angled, shoulders rolled back, chin lifted, arms tightly crossed, and a playful self-assured smirk. Dress the subject in a luxury red velvet Santa-inspired outfit with clean white fur trim, Santa hat, white gloves, stylish black sunglasses, and modern white sneakers. Use a seamless bright red studio background with a soft spotlight gradient, floating metallic silver confetti, and a realistic full-body reindeer on camera right wearing a cozy red-and-green knitted scarf. Use crisp commercial studio lighting, low-angle wide lens around 20-28mm, high texture detail, slight depth of field, premium poster realism, no text. Output: 9:16 aspect ratio, high-quality image, clean composition, GPT Image 2 ready.