✓ 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
Comprehensive SVG-based implementation with correct Archimedes physics (gold 19.32 g/cm³, gilded 11.30 g/cm³, same 1000 g mass), live data panel, comparison bars, splash particles, ambient bubbles, and a triggered Heureka animation — slider is custom drag-on-SVG (no native range input) which slightly limits accessibility but works well; mass display is static (not live-updating with slider) and the Eureka text renders over an awkward area of the scene.
14,414 output tokens · claude-opus-4-6 · end_turn
Comprehensive SVG-based implementation with correct Archimedes physics (gold 19.32 g/cm³, gilded 11.30 g/cm³, same 1000 g mass), live data panel, comparison bars, splash particles, ambient bubbles, and a triggered Heureka animation — slider is custom drag-on-SVG (no native range input) which slightly limits accessibility but works well; mass display is static (not live-updating with slider) and the Eureka text renders over an awkward area of the scene.