Create a photorealistic image of an indoor atrium featuring a grand staircase at twilight. The architecture should be modern, with clean lines and tiled floors reflecting the ambient lighting. Install pink and teal neon lights along the edges of the stairway and across the ceiling, casting a vibrant glow that contrasts with the natural fading light from the sky. At the top of the staircase, a mural of outer space with stars of various colors shining through infuses the scene with warm colors and a dreamlike atmosphere. The overall setting should evoke the nostalgic essence of a retro-futuristic mall from an 80s movie, serene and almost surreal in its ambiance. --ar 2:3