display:none toggle was instant and felt jarring during auto-fold/ auto-expand. Swapped to a CSS class `.is-folded` that transitions max-height (0 ↔ 1200px) and opacity (0 ↔ 1) over ~280ms with ease, so both manual chevron clicks and the scroll-driven toggles slide in/out smoothly.
127 KiB
127 KiB