Build a Minecraft-style voxel game in a single HTML file that runs in the browser. - First-person controls: WASD, mouse look, jump - Procedural terrain with hills, water and trees - Place and break blocks with the mouse, 5 block types - Advanced shaders: moving sun, soft shadows, ambient occlusion, fog, water reflections - Smooth 60 fps on a laptop Use Three.js from a CDN. Test it, fix every bug, then keep improving the visuals until it looks as realistic as possible.