A cozy, polished office portrait with warm window light, rich chocolate tones, and a relaxed coffee-in-hand pose.

"A stylish, candid lifestyle portrait of a young man with short, thick, tousled black hair, light stubble, and a trimmed mustache, gazing off to the side with a relaxed, slightly amused smile. He wears thin round gold-rimmed glasses and sits comfortably on a large black bean bag covered in a repeating red text print, with his legs apart and both hands holding a white ceramic coffee mug in front of him. He wears a dark chocolate-brown co-ord set: a relaxed, boxy zip-up utility jacket with a spread collar and matching wide-leg drawstring trousers, layered over a cream graphic t-shirt. Accessories include a chunky gold-toned wristwatch, a silver ring, and chunky brown-and-cream monogram-patterned leather sneakers with cream soles. The setting is a modern office lounge with a tall black open bookshelf stocked with magazines and booklets on the left, a large frosted glass window with a soft peach-beige roller blind, and a textured grey-blue carpet on the floor. Soft, diffused natural daylight, a warm neutral palette of chocolate brown, cream, and peach against deep black and cool grey, natural skin texture, shallow depth of field, candid lifestyle photography, shot on a smartphone, vertical 4:5 aspect ratio, full-body seated framing, sharp focus on the subject."
Tips:
Add "photorealistic, soft window light, contemporary creative-office aesthetic" for a more lifelike result.
To avoid brand issues, replace the bean bag print with "a black bean bag with a repeating red text pattern" and the sneakers with "generic brown monogram-style sneakers."
For a moodier feel, add "cinematic color grading, muted warm tones."

Copy the complete prompt and use your own reference photos where requested.