Build an underground solarpunk + cyberpunk city carved into ...

Build an underground solarpunk + cyberpunk city carved into a massive cavern system. The city must be dense, multi-story, and extremely vertical with 6–8 stacked layers of streets, mezzanines, hanging walkways, rooftop platforms, ceiling-cling districts, and service tunnels. The atmosphere should feel cramped, hot, humid, and dark, with heavy steam, warm industrial glow, deep shadows, and occasional blackout pockets lit by emergency lights, but it must still look beautiful, stylish, and fun to explore. Combine solarpunk life-support tech with cyberpunk grit: mirrored solar light shafts from the surface, heliostat collectors, light wells, algae bioreactors, hydroponic terraces, moss walls, reclaimed wood and living plants growing through metal structures, water recycling canals and filtrati