Modern architecture firm, St Louis cityscape, sleek glass building, steel structure, minimalist interior design, wooden accents, creative lighting fixtures, collaborative workspace, busy professionals working on laptops, architectural models on display tables, city views from floor-to-ceiling windows, subtle branding elements, contemporary furniture, abstract art pieces, polished concrete floors, industrial-chic decor, panoramic view of the Gateway Arch, warm afternoon sunlight, shallow depth of field.