Chicago Willis Tower, modern skyscraper, sleek glass facade, steel beams, urban cityscape, afternoon sunlight, cloudless blue sky, busy streets, pedestrians in business attire, briefcase, sunglasses, suits, ties, contemporary office interior, minimalist decor, wooden desk, ergonomic chair, laptop, coffee cup, floor-to-ceiling windows, panoramic city view, 3/4 composition, soft focus on background, shallow depth of field, realistic lighting.