✓ 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 renders crowns in air, but HTML labels show "LUFT" at top and "WASSER" at bottom with a rotated slider — the visual affordance is correct but the CSS rotation makes the thumb move counterintuitively, dragging down increases value yet the slider track gradient and label placement create confusion); physics values (19.3 vs 11.0 g/cm³, same 1000 g mass) and Archimedes buoyancy calculations are accurate, and the Heureka overlay with color animation is a strong finishing touch.
8,040 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 at top renders crowns in air, but HTML labels show "LUFT" at top and "WASSER" at bottom with a rotated slider — the visual affordance is correct but the CSS rotation makes the thumb move counterintuitively, dragging down increases value yet the slider track gradient and label placement create confusion); physics values (19.3 vs 11.0 g/cm³, same 1000 g mass) and Archimedes buoyancy calculations are accurate, and the Heureka overlay with color animation is a strong finishing touch.