✓ 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 is correct conceptually, but the vertical-lr + direction:rtl CSS combo maps slider thumb to bottom when value=0, meaning dragging down raises the value and lowers the crowns — direction is actually correct in practice, but mass/density/volume values are static (not live-updating with slider), only displaced water and rise update dynamically.
5,603 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0 at top = crowns in air is correct conceptually, but the vertical-lr + direction:rtl CSS combo maps slider thumb to bottom when value=0, meaning dragging down raises the value and lowers the crowns — direction is actually correct in practice, but mass/density/volume values are static (not live-updating with slider), only displaced water and rise update dynamically.