✓ 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 maps to air, value increases downward toward water, but `writing-mode: bt-lr` with `-webkit-appearance: slider-vertical` makes the physical thumb travel bottom=water/top=air correctly in some browsers yet the `min=0` logic treats 0 as "air" and 100 as "water" — semantically correct but orientation rendering is browser-dependent and likely visually inverted); displaced-water values are linearly proportional to the slider rather than tracking actual submerged volume fraction, which slightly misrepresents Archimedes' principle for partial immersion.
7,509 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 at top maps to air, value increases downward toward water, but `writing-mode: bt-lr` with `-webkit-appearance: slider-vertical` makes the physical thumb travel bottom=water/top=air correctly in some browsers yet the `min=0` logic treats 0 as "air" and 100 as "water" — semantically correct but orientation rendering is browser-dependent and likely visually inverted); displaced-water values are linearly proportional to the slider rather than tracking actual submerged volume fraction, which slightly misrepresents Archimedes' principle for partial immersion.