Modern architecture expo, futuristic exhibition hall, sleek glass walls, minimalist interior design, steel beams, polished concrete floor, LED lights, interactive display booths, giant screens showcasing building designs, 3D printed models, innovative materials, sustainable energy systems, solar panels, green roofs, urban planning diagrams, bustling crowd of architects and designers, laptops and tablets displaying blueprints, pens and notebooks scattered on tables, creative brainstorming sessions, natural light pouring in through skylights, panoramic view of the expo floor.