Create a 3D cartoon-style rendition of a futuristic Disney-like castle, set against a completely black background. The castle should retain its classic fairytale structure but with sleek, modern upgrades. Incorporate subtle holographic details, like semi-transparent walls, floating platforms, and soft glowing accents. The design should feel playful yet advanced, with smooth, rounded shapes and a soft, polished look. Use a color palette of light metallic blues, purples, and whites, with gentle glowing lines and reflections, giving it a futuristic but cartoon-like, friendly appearance. The holographic elements should be subtle, allowing the cartoonish, 3D aesthetic to dominate