— 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
Polished general Archimedes demo with correct floating/sinking physics, but it shows zero crown-specific content — no two crowns, no gilded vs. pure-gold comparison, no vertical immersion slider, no fall animation, no splash, no Heureka moment, and dark background violates the light-bg requirement.
Polished general Archimedes demo with correct floating/sinking physics, but it shows zero crown-specific content — no two crowns, no gilded vs. pure-gold comparison, no vertical immersion slider, no fall animation, no splash, no Heureka moment, and dark background violates the light-bg requirement.