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A hyper-realistic studio product photo of a men's slim-fit long-sleeve button-up shirt, displayed on an invisible mannequin (ghost mannequin style). The shirt is solid muted gray (slightly greenish-gray tone), made from smooth cotton fabric with a soft matte finish and subtle natural wrinkles around the torso and sleeves. The shirt features a mandarin collar (band collar) with a short stand and no traditional fold-over collar. The front placket is centered with evenly spaced small white buttons, cleanly stitched.

The shirt includes a single chest pocket on the left side with a slightly curved top seam and a small white button closure. The fit is tailored and slim, emphasizing a fitted torso and slightly tapered waist. Sleeves are long and neatly pressed, with minimal creasing, ending in buttoned cuffs.

Lighting is soft, even studio lighting from the front-left, creating gentle shadows on the right side and under the arms, enhancing depth and fabric texture. The background is plain light gray to white gradient, completely clean and minimal, with no distractions.

Camera angle is straight-on, slightly angled to show the right side of the shirt (3/4 front view). The shirt appears floating with no visible model head or arms, clean ghost mannequin effect. Ultra high resolution, sharp focus, commercial fashion catalog style, realistic fabric texture, accurate stitching details, professional product photography, 8k detail.