✓ 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 (min=0/top=air is correct structurally but the CSS rotate(-90deg) trick doesn't reliably produce top=air/bottom=water UX; no continuous fall animation — crowns jump instantly to position rather than animating a fall.
10,442 output tokens · claude-opus-4-6 · end_turn
Slider is inverted (min=0/top=air is correct structurally but the CSS rotate(-90deg) trick doesn't reliably produce top=air/bottom=water UX; no continuous fall animation — crowns jump instantly to position rather than animating a fall.