✓ 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
Highly complete SVG-based implementation with correct physics (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass), live-updating all required data fields, particle splash, rising water, and Heureka animation — but the custom SVG drag-slider lacks a native range input, making precise positioning slightly awkward, and mass/volume/density values are static text rather than truly reactive displays.
10,338 output tokens · claude-opus-4-6 · end_turn
Highly complete SVG-based implementation with correct physics (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass), live-updating all required data fields, particle splash, rising water, and Heureka animation — but the custom SVG drag-slider lacks a native range input, making precise positioning slightly awkward, and mass/volume/density values are static text rather than truly reactive displays.