Create a timeless and elegant living room inspired by the Capricorn zodiac sign. The space should reflect sophistication and functionality, featuring a neutral and earthy color palette with shades of taupe, charcoal gray, and cream, accented by touches of dark wood and matte black. Include furniture with clean, classic lines and high-quality materials like leather, linen, and polished wood. Decorate with minimal yet impactful pieces, such as a sleek bookshelf, a statement armchair, or a simple yet striking piece of abstract art. Incorporate subtle metallic details in brushed brass or bronze for a touch of understated luxury. The overall vibe should exude professionalism, stability, and refinement, perfectly aligning with Capricorn's grounded and ambitious nature.