Birthday poster design: three-panel layered composition. Center top panel shows a young man with wavy shoulder-length hair and white beanie, warm smile, wearing a grey blazer over white tee. Bottom center panel shows the same man in a tan buttoned overshirt with layered necklace, smiling to the side. Left and right side panels show mirrored grayscale duotone repeats of his smiling profile at a slight diagonal crop. Text overlay at bottom: "HAPPY BIRTHDAY" in bold white sans-serif, name in elegant green script font below it. Studio-name watermark small in top corner. Clean graphic collage poster design, soft grayscale-to-color transition, fan-edit aesthetic.