✓ 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
Slider is styled with writing-mode bt-lr (attempting vertical) but renders as horizontal and lacks the orient="vertical" attribute enforcement across browsers; crown motion is also inverted (slider increasing pushes crowns upward rather than downward into water), and there is no true fall animation — crowns teleport rather than animate a drop.
Slider is styled with writing-mode bt-lr (attempting vertical) but renders as horizontal and lacks the orient="vertical" attribute enforcement across browsers; crown motion is also inverted (slider increasing pushes crowns upward rather than downward into water), and there is no true fall animation — crowns teleport rather than animate a drop.