✓ 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
Physics displacement logic is broken — getTotalDisplacedWater uses `waterYPosition - crownYPure` which is negative when crown is below water surface (giving zero displacement), the custom div-based slider lacks touch support and has no native range input, and water level rise is barely perceptible despite the correct conceptual setup.
Physics displacement logic is broken — getTotalDisplacedWater uses `waterYPosition - crownYPure` which is negative when crown is below water surface (giving zero displacement), the custom div-based slider lacks touch support and has no native range input, and water level rise is barely perceptible despite the correct conceptual setup.