✓ 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
Comprehensive SVG-based implementation with correct physics (Au 19.3 g/cm³ vs Au+Ag 13.0 g/cm³, same 1000 g mass), genuine splash particles, wave effects, and Heureka animation, but the slider is a custom SVG drag handle rather than a native range input, and the water-level indicator displays raw pixel values ("px") instead of physically meaningful units (cm³ or cm).
9,597 output tokens · claude-opus-4-6 · end_turn
Comprehensive SVG-based implementation with correct physics (Au 19.3 g/cm³ vs Au+Ag 13.0 g/cm³, same 1000 g mass), genuine splash particles, wave effects, and Heureka animation, but the slider is a custom SVG drag handle rather than a native range input, and the water-level indicator displays raw pixel values ("px") instead of physically meaningful units (cm³ or cm).