✓ 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 inverted (top=LUFT/air=value 0, bottom=WASSER/water=value 100 but slider visually moves DOWN to increase, which in a bt-lr vertical slider maps incorrectly); water level rise is non-functional (goldWaterLevel always equals currentDepth % regardless of crown volume ratio, never showing the alloy displacing more visually); mass/volume/density values are static, not live; no fall animation; displaced water math is logically circular (goldDisplaced/GOLD_VOLUME * 100 always equals slider %).
Slider is inverted (top=LUFT/air=value 0, bottom=WASSER/water=value 100 but slider visually moves DOWN to increase, which in a bt-lr vertical slider maps incorrectly); water level rise is non-functional (goldWaterLevel always equals currentDepth % regardless of crown volume ratio, never showing the alloy displacing more visually); mass/volume/density values are static, not live; no fall animation; displaced water math is logically circular (goldDisplaced/GOLD_VOLUME * 100 always equals slider %).