Modern gymnasium building, exposed wooden beams, reclaimed wood flooring, eco-friendly rubber sports surfaces, energy-efficient LED lighting, large skylights, natural ventilation systems, solar panels on rooftops, green roofs with lush vegetation, rainwater harvesting systems, minimalist interior design, angular lines, industrial-chic aesthetic, bright open spaces, floor-to-ceiling windows, flexible seating areas, motivational quotes on walls, dynamic color schemes, shallow depth of field, 1/1 composition, realistic textures, ambient occlusion.