Photorealistic casual portrait of a young adult man on a boat at sea. Tight medium shot from the upper body with visible forearms; the subject occupies almost the entire frame with the head close to the top edge. He has a neat haircut and beard, warm tanned skin, a daring and calm facial expression with a slightly mocking confident half-smile, looking directly into the camera. Dark sunglasses with a thin warm metal frame rest on his hair. The clothing is maximally simple: a solid-color tight-fitting black t-shirt without logos, contrasting sharply with the sea background. On one wrist, a thin black rope bracelet. The front hand holds a narrow flute glass with a pale sparkling drink in the lower center of the frame, fingers naturally grasping the glass. The composition resembles a close-up vacation smartphone shot: shoulders and arms are partially cropped by the edges, the angle is almost straight, slightly intimate, and candid. Background: left side shows dark blue sea water and a soft pale-blue evening sky with a low horizon line; right side features a white yacht hull or sail surface creating a light diagonal behind the head. Warm low sunlight from the front-left side provides orange highlights on the face and hands, soft shadows on the black fabric, natural contrast, shallow depth of field, sharp focus on the face and glass. Relaxed yacht vacation atmosphere, realistic color reproduction, slight grain, style of a live social media photo. 9:16 aspect ratio, preserve identity 100%.