✓ 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 (rotated 180° CSS trick means dragging up = submerging, not the intended top=air/bottom=water), splash effects are a no-op stub, and crown "animation" is purely positional translation with no easing or fall dynamics.
Slider direction is inverted (rotated 180° CSS trick means dragging up = submerging, not the intended top=air/bottom=water), splash effects are a no-op stub, and crown "animation" is purely positional translation with no easing or fall dynamics.