A hyper-realistic portrait of a woman looking straight ahead, with radiant brown skin and long wavy hair that falls softly over her shoulders. His eyes are a deep brown, naturally reflecting light, and he wears a warm and cheerful expression with a genuine smile. He wears a vibrant yellow T-shirt, whose texture is clearly visible, with realistic folds and details. The background is a crystalline blue pool, where reflections of the water and a light effect are observed that are dispersed in a warm and harmonious way, creating a contrast between the yellow of the shirt and the blue of the background. Everything in the scene must be in Ultra HD (4K) quality, with vivid colors and impeccable textures, highlighting the summery and fresh atmosphere