Unifies the breakpoint system and fixes cross-layer CSS bugs that kept
the old mobile hide rules from ever taking effect.
Breakpoints:
- Document canonical xs/sm/md/lg/xl/2xl scale in variables.base.css
- Replace 968px one-offs with 1024px (app-details, app-page-editor)
- Make details tab-panel max-width responsive (min(70ch, 100%))
Topbar (< md):
- Hide breadcrumb in components layer so cross-layer overrides actually win
- Dock search icon alongside right-column icons via flex layout
- Add xs (400px) tightening for hit-area preservation
- Hide brand divider alongside hidden brand name
- Switch hover states to theme-aware --app-dropdown-hover-background-color
Mobile drawer:
- Icon-bar now vertical like desktop (was horizontal top strip, effectively invisible)
- Sidebar shifted 52px right so icon-bar and sidebar slide in as one 280px unit
- Add breathing room above first nav item (20px top padding)
List tabs:
- Rewrite .app-list-tabs to horizontal scroll with hidden scrollbar, snap,
and mask-image gradient fades; add initListTabs to scroll active into view
- Register as runtime component in app-init.js
List toolbar:
- Stack wide controls (multi-select, search/text inputs) full-width below sm,
keep compact controls at natural width
Footer:
- New dedicated app-footer.css with mobile-first stacking, border-top separator,
theme-aware hover; remove redundant rules from app-shell.css
Notification dropdown:
- Width with min(360px, 100vw - 2rem) and min-width: 0 override global
details > ul rule; switch to position: fixed below md so it hugs the
viewport right edge instead of the non-rightmost bell button
Content spacing:
- Add padding-block-start to .app-main-content on mobile (was 0)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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