Create a premium, ultra-realistic vertical birthday portrait poster featuring the same young man in a dramatic two-scale composition, closely matching the reference image's layout, portrait placement, geometric background, typography, color palette, and professional graphic-design aesthetic. Place a large monochrome close-up portrait of the man on the left side, showing his face and upper head in sharp detail with a confident natural expression, while a smaller full-body portrait of the same man stands on the right side in a stylish relaxed walking pose, one hand naturally near his side and the other positioned casually, looking slightly toward the side with a confident expression. He is wearing a {Select Outfit, black-and-white printed bomber jacket with white T-shirt and black cargo pants, graphic black-and-white jacket with black T-shirt and jeans, printed overshirt with white T-shirt and black trousers, monochrome streetwear jacket with cargo pants, patterned casual jacket with black jeans}, with {Select Shoes, black and white high-top sneakers, white sneakers, black sneakers, chunky sneakers, casual high-top shoes} and a {Select Hairstyle, voluminous textured hair, modern quiff, messy textured hair, side-swept hairstyle, classic voluminous hairstyle}. Design the background using {Select Theme Color, blue, navy blue, grey, black, purple, teal} with layered geometric diagonal shapes, soft gradients, clean architectural blocks, subtle shadows, and a premium modern poster aesthetic. Add elegant birthday typography featuring “{Enter Name}”, “HAPPY BIRTHDAY”, and “{Enter Birthday Date}”, with a smaller heartfelt birthday message underneath, using sophisticated modern fonts and balanced spacing; keep all text crisp, correctly spelled, readable, and professionally positioned without covering the portraits. Apply a cinematic monochrome treatment to the large close-up portrait while keeping the smaller full-body portrait in realistic natural color, creating strong visual contrast between both portraits. Use soft studio lighting, realistic skin texture, detailed hair strands, natural facial proportions, sharp clothing details, subtle shadows, premium editorial photography, professional graphic composition, photorealistic 8K quality, and a vertical 4:5 poster layout. If the user uploads a photo, the user's face must be preserved 100% exactly as provided, including facial structure, eyes, eyebrows, nose, lips, jawline, beard/moustache, skin tone, hairline, facial proportions, and every recognizable identity characteristic; do not beautify, reshape, redesign, retouch, age, de-age, or reinterpret the face, and ensure the large portrait and full-body portrait contain the exact same facial identity. Keep the final result premium, masculine, cinematic, modern and photorealistic, with no distorted face, inconsistent identity, malformed hands, extra fingers, extra limbs, artificial skin, random text, misspelled words, logo, watermark, cartoon, CGI, or illustration.