✓ Two crowns ✓ Same mass, different density ✓ Vertical slider ✓ Slider works ✓ Slider controls crowns ✓ Slider direction correct ✓ Full slider range — Fall animation ✓ Water displacement ✓ Rising water level ✓ Splash effects ✓ Physics correct ✓ Live mass value ✓ Live volume value ✓ Live density value ✓ Live displaced water ✓ Gilded displaces more ✓ Heureka animation ✓ No external deps ✓ Light bg / dark text ✓ Self-contained HTML
Solid SVG-only implementation with correct physics (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass), proportional water rise, particle splashes, and a Heureka fade-in; lacks true fall animation (crowns teleport via slider rather than animating on their own), and the slider thumb update code is awkward/redundant (transform set then cleared) but functionally works.
9,780 output tokens · claude-opus-4-6 · end_turn
Solid SVG-only implementation with correct physics (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass), proportional water rise, particle splashes, and a Heureka fade-in; lacks true fall animation (crowns teleport via slider rather than animating on their own), and the slider thumb update code is awkward/redundant (transform set then cleared) but functionally works.