Minimalist yin-yang composition formed by two wolf heads only, one black wolf and one white wolf, ultra realistic, photorealistic fur texture, perfectly circular shape, heads rotated upside down relative to each other (one inverted), noses touching, seamless yin-yang balance, clean black background, no body visible, no extra elements, soft controlled studio lighting, high contrast, calm and neutral expressions, precise symmetry, minimalism, fine details, sharp focus exact mirrored orientation, strict rotational symmetry, reference-like composition