Brutalist cliffside retreat, modern concrete architecture embedded in rocky terrain, large glass windows reflecting overcast sky, minimalistic interior with a curved rust-colored velvet sofa, open fireplace with warm glow, tranquil natural pond reflecting structure and bare trees, autumn branches surrounding the space, soft golden hour lighting, serene and moody ambiance, raw textures of concrete and stone, harmonious contrast between nature and architecture, high-resolution, ultra-realistic, cinematic framing, cozy brutalism aesthetic