A modern high-rise apartment building for a 3D video game. The building should have a realistic and detailed exterior suitable for parkour gameplay — with ledges, balconies, pipes, and rooftop access. Include a simple interior layout with rooms, stairs, and hallways. It should be optimized for game engines like Unity or Unreal. Keep a modern urban design with neutral colors like gray, white, or dark glass. The building should be tall and narrow, like a realistic city apartment block.