Modern skyscraper, Chicago cityscape, office building, glass facade, steel structure, sleek lines, minimalist interior, open floor plan, collaborative workspace, ergonomic furniture, natural light pouring in through large windows, urban landscape, busy streets, Willis Tower, Millennium Park, cloudless blue sky, dramatic cloudy sky, warm afternoon sunlight, panoramic view, 3/4 composition, soft focus on the building's edges, realistic, HDR.