Modern sustainable building, steel frame structure, eco-friendly materials, recycled metal, low-carbon footprint, energy-efficient systems, natural ventilation, abundant daylight, green roofs, solar panels, wind turbines, rainwater harvesting, minimalist design, industrial aesthetic, exposed ductwork, polished concrete floors, bright open spaces, natural stone walls, living green walls, urban landscape, city skyline, clear blue sky, warm sunny day, soft diffused lighting, 1/1 composition, shallow depth of field, realistic textures.