✓ 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
All required features are implemented with physically plausible values (Au: 19.3 g/cm³, 51.8 cm³; Au/Ag: 13.0 g/cm³, 76.9 cm³, same 1000 g mass), but mass and density live values are static (pre-rendered text, not dynamically updated), and the custom SVG drag-slider is less accessible than a native range input.
9,427 output tokens · claude-opus-4-6 · end_turn
All required features are implemented with physically plausible values (Au: 19.3 g/cm³, 51.8 cm³; Au/Ag: 13.0 g/cm³, 76.9 cm³, same 1000 g mass), but mass and density live values are static (pre-rendered text, not dynamically updated), and the custom SVG drag-slider is less accessible than a native range input.