✓ 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 is inverted (min=0 at top maps to crowns in air, but HTML range inputs render min at top by default on vertical — the CSS uses rotate(-90deg) on a standard LTR slider, making high values = down visually, but value=0 starts with crowns in air which is correct behavior; however the transform approach is non-standard and the slider thumb direction is effectively inverted from expected UX convention). Physics and ASCII rendering are solid: same mass (1000g), correct densities (19.3 vs 13.0 g/cm³), correct volumes, gilded crown displaces more water, iterative water-rise calculation is thoughtful, and the Heureka overlay triggers properly at full submersion.
8,193 output tokens · claude-opus-4-6 · end_turn
Slider is inverted (min=0 at top maps to crowns in air, but HTML range inputs render min at top by default on vertical — the CSS uses rotate(-90deg) on a standard LTR slider, making high values = down visually, but value=0 starts with crowns in air which is correct behavior; however the transform approach is non-standard and the slider thumb direction is effectively inverted from expected UX convention). Physics and ASCII rendering are solid: same mass (1000g), correct densities (19.3 vs 13.0 g/cm³), correct volumes, gilded crown displaces more water, iterative water-rise calculation is thoughtful, and the Heureka overlay triggers properly at full submersion.