✓ 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 at bottom maps to immersionFrac=1 via `1 - rawVal/1000`, so dragging down submerges — but the browser renders vertical range with min at bottom by default, making top=submerged, bottom=air, opposite of spec); all physics values (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass, correct buoyancy formula) are accurate and clearly visualized.
8,907 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0 at bottom maps to immersionFrac=1 via `1 - rawVal/1000`, so dragging down submerges — but the browser renders vertical range with min at bottom by default, making top=submerged, bottom=air, opposite of spec); all physics values (gold 19.3 g/cm³, gilded 13.0 g/cm³, same 1000 g mass, correct buoyancy formula) are accurate and clearly visualized.