✓ 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 direction is inverted (value=0 at top maps to crowns in air via hint "Ziehe nach unten", but `writing-mode: bt-lr` on a vertical range means the visual top is max=100/water and bottom is min=0/air, contradicting the intended mapping); all other features are genuinely and cleanly implemented.
Slider direction is inverted (value=0 at top maps to crowns in air via hint "Ziehe nach unten", but `writing-mode: bt-lr` on a vertical range means the visual top is max=100/water and bottom is min=0/air, contradicting the intended mapping); all other features are genuinely and cleanly implemented.