Create modular top-down building sprite sheets for a late-90s GTA-style sandbox.

Production rules:
- modular building chunks
- reusable roofs, edges, windows, entrances
- 128x128 building chunks
- 32x32 detail tiles
- shadows baked as separate optional overlay cells
- strong roof/wall separation
- visual clarity over realism

Building types:
apartment blocks, office towers, police station, hospital, gang hideout, warehouse, strip club, pizza shop, gas station, nightclub, hotel, convenience store, bank, harbor building, subway entrance, parking garage, prison, radio station.

Variants:
small, medium, large, damaged, dirty, luxury, industrial, slum.
