— 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 general Archimedes demo with correct physics and polished dark-themed UI, but completely misses the prompt's core requirements: no crowns (pure gold vs. gilded), no vertical fall-into-water slider, no splash/Heureka animation, and sliders are horizontal parameter knobs — not the crown-dipping control asked for.
Solid general Archimedes demo with correct physics and polished dark-themed UI, but completely misses the prompt's core requirements: no crowns (pure gold vs. gilded), no vertical fall-into-water slider, no splash/Heureka animation, and sliders are horizontal parameter knobs — not the crown-dipping control asked for.