✓ 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 is labeled "hoch"/up but crowns are in air, while dragging toward 100/bottom submerges them — technically correct mechanically but the label orientation and rtl/direction:rtl setup creates ambiguity; no autonomous fall animation, crowns only move with slider input).
Slider direction is inverted (value=0 is labeled "hoch"/up but crowns are in air, while dragging toward 100/bottom submerges them — technically correct mechanically but the label orientation and rtl/direction:rtl setup creates ambiguity; no autonomous fall animation, crowns only move with slider input).