Separate Panels That Display Different Futuristic Vehicles

Create an artwork featuring separate panels that display different futuristic vehicles against a gradient background shifting from cool blue to deep purple. The showcased vehicles should include a flying car, a hoverboard, a spaceship, and an underwater drone, all designed with a highly detailed cyberpunk aesthetic. Incorporate glowing neon highlights, complex mechanical features, and realistic metallic reflections enhanced by simulated lighting. Use vibrant tones and striking contrasts with rich color gradients to emphasize a sleek, high-tech urban vibe.