Prompt de portrait éclair au bord de la piscine de nuit.

Vertical 9:16 realistic night poolside flash portrait. Adult young woman sitting on the edge of a swimming pool at night, high-angle close full-body composition, face to most of the legs naturally in frame. She looks directly into the camera with bright eyes, clear catchlights, and a natural open smile, like being photographed by a friend with phone flash. She wears [swimwear style/color], with realistic fabric texture and slight water droplets. Hairstyle: [twin ponytails / wet long hair / high ponytail / soft wavy hair]. She sits slightly sideways, upper body gently twisted toward the camera, shoulders relaxed, chest naturally lifted, waist defined, smooth waist-to-hip curve. One leg extends forward, the other leg slightly bent or softly crossed, relaxed and graceful full-body poolside pose. Deep blue pool water in the background, visible ripples and white light reflections, wet stone tiles around the pool. Cool white direct flash on the subject, darker blue pool background, realistic skin texture, natural moisture, slight grain, real camera feeling. Avoid flat expression, blank eyes, weak smile, plastic skin, over-smoothing, oily face, CGI look, distorted hands, wrong fingers, distorted legs, wrong toes, exaggerated feet, deformed swimwear, stiff pose, overexposure, cartoon or illustration style.