✓ 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
All required features are fully implemented with correct physics (ρ_gold=19320, ρ_gilded=11000, same 1000g mass), an animated Heureka overlay with Archimedes figure, particle splash effects, live data panels, and a bar-chart comparison — the custom SVG drag-slider works but lacks a native input[type=range] and the water-rise pixel values (MAX_RISE_1=18, MAX_RISE_2=32) are visually convincing but not derived directly from first-principles container geometry.
12,513 output tokens · claude-opus-4-6 · end_turn
All required features are fully implemented with correct physics (ρ_gold=19320, ρ_gilded=11000, same 1000g mass), an animated Heureka overlay with Archimedes figure, particle splash effects, live data panels, and a bar-chart comparison — the custom SVG drag-slider works but lacks a native input[type=range] and the water-rise pixel values (MAX_RISE_1=18, MAX_RISE_2=32) are visually convincing but not derived directly from first-principles container geometry.