Cinematic Sci-Fi Megacity Sequence

15-second cinematic sci-fi sequence, ultra-realistic, dark and haunting. Open on a silent megacity at dawn, streets empty, abandoned cars, skyscraper windows flickering with dying power. Massive autonomous machines move through the ruins, repairing data centers and harvesting metal while no humans remain. Cut to robotic factories operating without workers, server halls glowing like artificial temples, drones crossing a smoke-filled sky. Final shot: Earth seen from orbit at night, most cities dark except for vast geometric networks of cold machine lights spreading across the continents. A calm synthetic voice whispers, "Objective continues." Slow camera movement, immense scale, atmospheric fog, volumetric lighting, deep shadows, cinematic sound design, ominous low-frequency score, realistic physics, no gore, 16:9.