Modern architectural firm, Washington D.C., urban cityscape, glass skyscraper, sleek metal frames, LED strip lights, warm ambiance, evening scene, 3/4 composition, low-angle shot, dramatic shadows, polished concrete floor, minimalist interior, wooden accents, green walls, innovative lighting fixtures, futuristic atmosphere, professional designers working, laptops and sketches scattered, creative brainstorming session, natural light pouring in through floor-to-ceiling windows, panoramic city view.