— 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
Completely wrong demo — no crowns, no vertical slider, no gold/gilded density comparison, no fall or splash animations, and physics values (arbitrary relative units, no Archimedes-correct buoyancy per object) do not satisfy the prompt requirements.
Completely wrong demo — no crowns, no vertical slider, no gold/gilded density comparison, no fall or splash animations, and physics values (arbitrary relative units, no Archimedes-correct buoyancy per object) do not satisfy the prompt requirements.