A cinematic summer-lake photograph of an adult woman swimming in crystal-clear blue water, wearing a sleek black swimsuit, wet dark hair flowing naturally behind her, captured from water level as she moves through gentle waves. Distant mountains and several waterbirds create a serene horizon beneath a bright blue sky, sunlight sparkling across the surface, natural reflections, tasteful swimwear editorial aesthetic, realistic skin and wet-hair details, atmospheric composition, photorealistic, high resolution, masterpiece, very detailed image, professional image, 4K image