✓ 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/top=air is correct in concept but the vertical-lr + rtl CSS styling makes the physical top of the slider correspond to value 0/air, which is correct — however no fall animation exists, only instant position jumps driven by slider value, and ASCII-art rendering limits visual clarity of water rise differentiation.
Slider direction is inverted (min=0/top=air is correct in concept but the vertical-lr + rtl CSS styling makes the physical top of the slider correspond to value 0/air, which is correct — however no fall animation exists, only instant position jumps driven by slider value, and ASCII-art rendering limits visual clarity of water rise differentiation.