✓ 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
Solid implementation with correct Archimedes physics (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass), SVG-based custom slider works well but lacks smooth fall animation — crowns teleport rather than animate falling, and the Heureka fade-in has a minor math bug in the easing function.
11,124 output tokens · claude-opus-4-6 · end_turn
Solid implementation with correct Archimedes physics (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass), SVG-based custom slider works well but lacks smooth fall animation — crowns teleport rather than animate falling, and the Heureka fade-in has a minor math bug in the easing function.