✓ 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 physics (Au 19.3, gilded 13.0, same 1000g mass, correct displacement scaling) and clean SVG layout, but crown motion is purely linear with no inertial/falling animation — the "fall" is a rigid slider-driven translate, and splash particles are only triggered on entry, not on re-entry or slider reversal edge cases.
Solid physics (Au 19.3, gilded 13.0, same 1000g mass, correct displacement scaling) and clean SVG layout, but crown motion is purely linear with no inertial/falling animation — the "fall" is a rigid slider-driven translate, and splash particles are only triggered on entry, not on re-entry or slider reversal edge cases.