✓ 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
Exceptionally complete implementation with correct physics (ρ_gold=19320, ρ_gilded=11300, equal 1000 g mass), animated splash/ripple/bubble/heureka sequence, rising water levels, live data panels, and a comparison panel — minor weakness is that the SVG drag-slider lacks a native HTML range input, making precise control somewhat fiddly, and the water-rise scale factor (0.5 px/cm³) is arbitrary and not anchored to a real container cross-section.
14,648 output tokens · claude-opus-4-6 · end_turn
Exceptionally complete implementation with correct physics (ρ_gold=19320, ρ_gilded=11300, equal 1000 g mass), animated splash/ripple/bubble/heureka sequence, rising water levels, live data panels, and a comparison panel — minor weakness is that the SVG drag-slider lacks a native HTML range input, making precise control somewhat fiddly, and the water-rise scale factor (0.5 px/cm³) is arbitrary and not anchored to a real container cross-section.