Cloud security reference architecture, futuristic, high-tech, modern building, skyscraper, cityscape, evening scene, blue tone, neon lights, clouds reflected on glass windows, complex network diagrams, servers, routers, firewalls, encryption algorithms, access control systems, intrusion detection systems, virtual private networks, secure authentication protocols, data encryption methods, threat intelligence feeds, security information event management systems, 3/4 composition, low-angle shot, cinematic lighting, depth of field, realistic rendering, highly detailed textures.