mirror of
https://seed.radicle.dev/rad:z4V1sjrXqjvFdnCUbxPFqd5p4DtH5.git
synced 2026-10-18 19:30:27 +08:00
Add sidebar sub-nav expand/collapse unfurl, now driven by the CSS View Transitions API instead of JS tweening. Each nav section is a view-transition group that clips into a top-to-bottom reveal as it opens or closes, with a masked gradient soft edge. A small JS flag (`sidebar-unfurling` on the document element) gates the gradient to actual open/close, since CSS can't tell a within-section navigation from a section toggle.