✓ 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
Impressively complete ASCII-art implementation with correct physics (gold 19.3 g/cm³, gilded 11.2 g/cm³, same 300 g mass), all live values, splash effects, rising water, and a 3-frame animated Heureka overlay — minor flaw is the water-rise scaling factor is arbitrarily doubled (×8 then ×2 label) rather than derived from true geometry, and the vertical slider uses deprecated `orient` attribute with `-webkit-appearance` which may not render as vertical on all browsers.
Impressively complete ASCII-art implementation with correct physics (gold 19.3 g/cm³, gilded 11.2 g/cm³, same 300 g mass), all live values, splash effects, rising water, and a 3-frame animated Heureka overlay — minor flaw is the water-rise scaling factor is arbitrarily doubled (×8 then ×2 label) rather than derived from true geometry, and the vertical slider uses deprecated `orient` attribute with `-webkit-appearance` which may not render as vertical on all browsers.