Three-tier security architecture, futuristic, high-tech, modern, sleek, metallic, silver, glass, steel, complex network, wires, servers, routers, firewalls, data centers, monitoring screens, holographic projections, virtual assistants, AI-powered systems, advanced encryption, access control, intrusion detection, alert systems, backup generators, climate control, raised flooring, LED lighting, cityscape, metropolitan area, skyscraper, nighttime, neon lights, misty atmosphere, cinematic composition, high contrast, dramatic lighting.