✓ 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
Exceptionally complete implementation hitting every feature requirement; minor physics flaw is that water rise is artificially amplified 3× ("amplify for visibility") rather than derived from a consistent px/cm scale, and the water rise is capped arbitrarily at 55px, making the displacement ratio visually misleading despite the text values being correct.
Exceptionally complete implementation hitting every feature requirement; minor physics flaw is that water rise is artificially amplified 3× ("amplify for visibility") rather than derived from a consistent px/cm scale, and the water rise is capped arbitrarily at 55px, making the displacement ratio visually misleading despite the text values being correct.