✓ 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 — CSS `transform: rotate(180deg)` plus `bt-lr` writing-mode makes top=water/bottom=air contrary to spec, and the label text "0%=Luft / 100%=Wasser" confirms the intended mapping but the physical thumb travel is reversed from the requirement (top=air).
7,993 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted — CSS `transform: rotate(180deg)` plus `bt-lr` writing-mode makes top=water/bottom=air contrary to spec, and the label text "0%=Luft / 100%=Wasser" confirms the intended mapping but the physical thumb travel is reversed from the requirement (top=air).