✓ 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
Impressively complete ASCII-art implementation covering all required features with correct physics (ρ_gold=19.3, ρ_fake=12.1, same mass), rising water, splash particles, live data panel, and a block-letter Heureka overlay — minor weaknesses are the rAF loop polling the slider rather than event-driven updates, and the vertical slider direction relying on deprecated -webkit-appearance:slider-vertical which may not render correctly in all browsers.
7,437 output tokens · claude-opus-4-6 · end_turn
Impressively complete ASCII-art implementation covering all required features with correct physics (ρ_gold=19.3, ρ_fake=12.1, same mass), rising water, splash particles, live data panel, and a block-letter Heureka overlay — minor weaknesses are the rAF loop polling the slider rather than event-driven updates, and the vertical slider direction relying on deprecated -webkit-appearance:slider-vertical which may not render correctly in all browsers.