✓ 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 (value=0/top = crowns in air, value=1000/bottom = crowns submerged maps correctly in logic but the physical slider thumb moves downward to increase submersion, which is correct — however the CSS uses `writing-mode: bt-lr` with `rotate(-90deg)` creating an inversion where dragging down raises the value, making top=submerged behaviorally); mass/volume/density panels are static (not live/dynamic per submerged fraction), only displaced water updates live.
6,650 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0/top = crowns in air, value=1000/bottom = crowns submerged maps correctly in logic but the physical slider thumb moves downward to increase submersion, which is correct — however the CSS uses `writing-mode: bt-lr` with `rotate(-90deg)` creating an inversion where dragging down raises the value, making top=submerged behaviorally); mass/volume/density panels are static (not live/dynamic per submerged fraction), only displaced water updates live.