プロンプト(そのままコピペで) You are an expert game developer. Create a complete, fully playable Minecraft-style voxel sandbox game in a SINGLE HTML file using Three.js (load via CDN). Requirements: Infinite or large procedural voxel world with multiple biomes (grassland, forest, desert, mountains) Day/night cycle with sky color change and simple sun/moon Different block types: grass, dirt, stone, wood, leaves, sand, water, coal, iron ore etc. First-person controls: WASD movement, mouse look, space to jump, mouse click to break/place blocks Simple inventory/hotbar (at least 5-6 block types selectable with number keys) Basic physics: gravity, collision with blocks Procedural terrain generation (hills, caves, trees) Highlight selected block face Clean UI: crosshair, block preview, FPS counter Responsive and smooth performance Dark mode friendly, polished visuals with basic textures (use colors or simple materials) Include instructions on screen at start Output ONLY the complete single HTML file with everything embedded. No explanations outside the code. Make it instantly playable by opening the file in browser. Add comments in code for easy modification. Start building it now!