- Close button: keep the empty .btn-close (CSS-mask icon over currentcolor);
  drop the wrong 'add a child SVG' instruction that double-rendered the icon,
  and note .btn-close-white is gone (set text color instead)
- Border radius: remove the fabricated $border-radius-2xl rename; document the
  real $radius base + $radii map (0-9) + --radius-* tokens
- Font sizes: note lg+ are fluid clamp() values (not exact rems) and list the
  full xs-6xl scale
- Add a 'Rebuilt behavior & new components' section: carousel→scroll-snap with
  opt-in autoplay, scrollspy→IntersectionObserver, the new components
  (combobox, chips, datepicker, range, strength, otp-input, nav-overflow,
  toggler), util/backdrop.js removal, CSS @layer, and --bs-*-rgb removal
- Extend the Phase 6 grep checklist for all of the above