ultra-realistic cinematic portrait, 9:16, medium full body shot, a young woman floating gracefully underwater, body slightly tilted with relaxed limbs and calm expression looking toward camera, face lock: preserve exact facial features, skin tone and hairstyle from reference, skin: soft natural white skin with ultra clean texture and subtle underwater light reflections, hair: long flowing hair spreading naturally in water, clothing: elegant flowing dress in black and white color combination with semi-sheer fabric drifting around body creating fluid motion, environment: clear blue underwater scene with sunlight rays passing through surface and soft caustic patterns on body and floor, lighting: natural underwater light from above creating highlights and gentle shadows, color: cool blue tones with strong contrast from black and white fabric, lens: 50mm shallow depth of field with subject sharp and soft depth falloff
