Tech Keynote Smartphone

A stunning product mockup of a sleek matte-black smartphone floating at a dynamic angle against a gradient background that transitions from deep midnight blue to soft lavender. The phone screen displays a vibrant AI-generated artwork of a cosmic nebula. Tiny particles of light and stardust orbit around the device. Subtle glass reflections and caustic light patterns dance across the phone's surface. The phone casts a soft colorful shadow below. Clean tech-editorial aesthetic, Apple keynote presentation quality, studio lighting, photorealistic 3D render, octane render quality --ar 4:5