✓ 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
No native HTML range input — slider is a custom SVG drag handle with reasonable but imprecise interaction (no keyboard support, no touch-fine-grain), and the vertical slider requirement is technically met functionally but not via a standard input element.
10,053 output tokens · claude-opus-4-6 · end_turn
No native HTML range input — slider is a custom SVG drag handle with reasonable but imprecise interaction (no keyboard support, no touch-fine-grain), and the vertical slider requirement is technically met functionally but not via a standard input element.