✓ 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 top = crowns in air, but the native vertical range slider renders with 0 at bottom by default in most browsers, making top=water and bottom=air), undermining the core UX interaction despite an otherwise rich, physically accurate, and visually polished demo.
12,524 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0 at top = crowns in air, but the native vertical range slider renders with 0 at bottom by default in most browsers, making top=water and bottom=air), undermining the core UX interaction despite an otherwise rich, physically accurate, and visually polished demo.