Interactive 3D plush pig in a sunny alpine meadow

GOAL: "Plush Piggy" — a jelly plush pig in a football beanie (WebGPU + three.js) Copy everything below into another AI. MOTION: It describes WHAT to build, HOW it must behave and HOW it must look — with exact numbers, so results can be compared. 0. The task in one paragraph Build one file, pig.html (no build step, no npm, served from a local server): an interactive 3D scene with a plush jelly piglet wearing a fluffy beanie patterned like a football (soccer ball), standing in a sunny alpine meadow. The pig is a soft body simulated with XPBD, covered in shell fur, rendered with WebGPU. The background (sky, mountains, pines, grass, flowers) is a separate three.js scene on a canvas underneath the pig, sharing the same camera. You can pick the pig up and drop it (it bounces like jelly), poke it, comb its pile; it dances, sticks its tongue out, waves, hops and oinks. The headline feature is a "Pin in place" button: the pig is fixed where it stands and you can pull it by any point (ear, snout, cheek, belly, arm, foot), even with two pointers at once; let go and the jelly wobbles back into shape.