The root cause of the hover-clipping we kept band-aiding with larger
track-heights: a scroll container with overflow-x: auto implicitly
clips on the perpendicular axis too. Explicit overflow-y: visible
lets cards expand above and below the track freely.
Implementation matches the spec's belt-and-braces pattern. New layered
markup:
.rr-wrap → position: relative, anchors fades
.rr-scroll → overflow-x: auto + overflow-y: visible,
padding 60/60/80, scroll-padding 60/60 sides
.rr-scroll-inner → structural, no layout effect
.rr-track → positioned at the inner wrapper
The padding-top: 60px / padding-bottom: 80px on .rr-scroll gives cards
room to grow above and below the track without ever hitting a clip
boundary, even on browsers that mis-handle the overflow-x/y mix.
Edge fades reposition: top: 60px / bottom: 80px (was 0 / 16) so they
only cover the track itself, not the overflow padding zones above and
below where hover-expanded cards now live.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>