Modern gymnasium interior, exposed structural frame, sleek steel beams, minimalist columns, polished concrete floors, industrial-style lighting, large windows, natural ventilation, open spaces, athletic equipment, basketball hoops, volleyball nets, exercise machines, wooden bleachers, dynamic color schemes, bold typography, geometric patterns, urban atmosphere, high ceilings, abundant natural light, shallow depth of field, 1/1 composition, realistic textures, ambient occlusion.