Design a sophisticated and luxurious logo for 'K Concept,' an upscale interior design office. Use an elegant color palette of gold, charcoal gray, and deep forest green for a refined, timeless feel. The logo should feature the letter 'K' in an artistic, stylized form, with clean, modern lines and subtle flourishes, evoking elegance and creativity. Incorporate a minimalist geometric element or abstract shape to represent the design expertise of the company. The font should be a modern serif or custom typeface, exuding professionalism and prestige. The overall look should convey high-end design sensibilities, suitable for an elite, exclusive interior design firm