Gloomy charter school, brutalist architecture, inspired by prison design, grey concrete walls, metal bars on windows, rusted iron doors, dimly lit corridors, eerie atmosphere, stern-looking teachers, students in uniform, backpacks and lunchboxes, lockers with combination locks, basketball court with worn-out nets, overcast sky, foggy weather, desaturated colors, dramatic shadows, cinematic lighting, low-angle shot, sense of claustrophobia.