✓ 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
Water-level rise formula (`displacedVolume / containerInnerWidth`) lacks unit coherence, the submersion-ratio logic against a moving `waterLevelY` misfires (crown never properly tracks the actual water surface), and crowns teleport rather than animate a fall.
Water-level rise formula (`displacedVolume / containerInnerWidth`) lacks unit coherence, the submersion-ratio logic against a moving `waterLevelY` misfires (crown never properly tracks the actual water surface), and crowns teleport rather than animate a fall.