POC: px lengths in clip-path on ::view-transition-new(root) are mis-mapped

Click Run (px): the dark snapshot should reveal as a circle centered exactly on the red dot, with the requested 150px radius. Spec (css-view-transitions-1 §4.1): the snapshot containing block is the viewport, so px coordinates map 1:1 to viewport CSS pixels — this works in Edge and Safari. In Chrome 150 the circle center is offset and the radius shrunk (px lengths are resolved against a mis-sized pseudo box). Run (%) shows the same animation in percentages, which maps correctly in both worlds.

Run (px) Run (%) Reset