Create a surreal portrait of a woman, her head gracefully tilted back against a minimalist white backdrop. Her hair cascades in exaggerated, fluid lines, and her facial features are accentuated with an almost dreamy quality. Her complexion emits an ethereal luminescence, enveloped in a palette of gentle pastel hues that evoke a serene, otherworldly ambiance. Achieve photorealistic detail in 4K UHD with rich textures and intricate nuances, capturing the essence of tranquility and mystery.