✓ 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 at top means crowns in air is correct, but value=0 starts at top of a vertical range which renders at bottom in CSS vertical sliders, so crowns start visually wrong); mass, volume, and density values are static HTML text rather than live JS-updated elements, failing the live-values requirement.
Slider direction is inverted (min=0 at top means crowns in air is correct, but value=0 starts at top of a vertical range which renders at bottom in CSS vertical sliders, so crowns start visually wrong); mass, volume, and density values are static HTML text rather than live JS-updated elements, failing the live-values requirement.