John Portman architecture, modern skyscraper, sleek glass exterior, steel beams, angular structure, vibrant cityscape background, bustling streets, daytime, natural light, soft shadows, pedestrians walking, urban atmosphere, Atlanta Marriott Marquis inspiration, geometric shapes, contemporary design, luxurious ambiance, grand atrium, marble floors, elegant chandeliers, sophisticated lines, 3/4 composition, panoramic view, warm lighting.