Act as a concept artist for a dystopian sci-fi film with experience in cyberpunk and dark futuristic settings. Design a grim, high-security prison where [INMATES] are monitored 24/7 by emotionless robotic guards with glowing red eyes and hydraulic limbs. The cells are made of [TRANSLUCENT ENERGY SHIELDS] that flicker ominously, revealing glimpses of prisoners in [NEON-STRAPPED RESTRAINT SUITS]. The atmosphere is oppressive, with flickering overhead lights casting long shadows, and the walls are lined with surveillance drones. The prison is surrounded by a [FORCE FIELD BARRIER] crackling with blue electricity, emphasizing its inescapability. Focus on cold metallic tones, harsh lighting, and a sense of hopelessness. Render in ultra-detailed 4K with a cinematic, moody composition.