— 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 reimagined as a generic Archimedes buoyancy demo with ASCII art and density/volume sliders — no crowns, no vertical crown-dipping slider, no two-crown comparison, no falling animation, no splash, no Heureka moment, dark background violates light-bg requirement; physics ratios are correct but the prompt's core scenario is entirely absent.
Completely reimagined as a generic Archimedes buoyancy demo with ASCII art and density/volume sliders — no crowns, no vertical crown-dipping slider, no two-crown comparison, no falling animation, no splash, no Heureka moment, dark background violates light-bg requirement; physics ratios are correct but the prompt's core scenario is entirely absent.