✓ 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/top=air is physically correct in label but the CSS-rotated range input causes visual top→bottom to actually go 0→1000, which may confuse users); live values for mass, volume, and density are static hardcoded text rather than dynamically updating data-row spans, so only displaced-water updates live.
9,050 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0/top=air is physically correct in label but the CSS-rotated range input causes visual top→bottom to actually go 0→1000, which may confuse users); live values for mass, volume, and density are static hardcoded text rather than dynamically updating data-row spans, so only displaced-water updates live.