✓ 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
Slider direction is inverted (min=0 at top maps to crowns in air which is semantically correct per code, but the CSS uses `transform: rotate(-90deg)` on a horizontal range, meaning visually dragging down increases value — however, value=0 is air and value=1000 is submerged, so top of physical slider = low value = air, which is actually correct; that said the gilded crown visually displaces more water as required, all physics values are plausible, and the heureka overlay triggers properly at full submersion.
7,507 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 at top maps to crowns in air which is semantically correct per code, but the CSS uses `transform: rotate(-90deg)` on a horizontal range, meaning visually dragging down increases value — however, value=0 is air and value=1000 is submerged, so top of physical slider = low value = air, which is actually correct; that said the gilded crown visually displaces more water as required, all physics values are plausible, and the heureka overlay triggers properly at full submersion.