.claude/context/design-system/DESIGN_SYSTEM.md

@@ -273,6 +273,7 @@ Mobile always has **5 pinned tabs in the bottom bar**. The rest go in the drawer
 | Status bar | 54px, Dynamic Island | 40px |
 | Top bar | 44px row: `menu` on the left; `plus` and avatar on the right (all accent-text). Then a 34px large title, then the search field. | 64px: `menu`, 22px title, `search`, avatar |
 | Bottom bar | Surface fill, 1px top line. Icon 24 above a 10px label. Active: accent-text. Idle: fg-3. 34px home indicator below. | Surface fill, 80px. Icon 24 above a 12px label (label space is always reserved, just invisible when idle, so nothing shifts on selection). The active icon sits inside a 56×32 accent-soft pill that slides between tabs as one shared indicator, rather than popping in/out per tab. 20px gesture bar below. |
+| Bottom bar - floating (Settings → Appearance → "Bottom bar", both platforms) | Same content, inset 16px from both side edges and clear of the bottom safe area instead of edge to edge, radius 28 (the sheet-top/drawer-edge radius) rather than square corners. No shadow (product UI stays flat - see 1.4); a 1px `line` border stands in for elevation instead. Row height drops slightly (64/72 vs 50/80) to suit. Android's idle tabs drop their reserved label space in this mode - the icon just centers in the button and renders a touch bigger (27 vs 24px) - rather than sitting high with a gap held open under it. `Scaffold.extendBody: true` while floating, so the body scrolls behind the bar's transparent margin instead of stopping short of it. |
 | Upload | `plus` in the nav bar | Extended FAB |
 | Overflow icon | `ellipsis` | `ellipsis-vertical` |
 | Settings | Pushed screen with a "‹ Files" back button and a large title. No bottom bar. | Pushed screen with a back arrow and a title. No bottom bar. |

.claude/context/styling.md

@@ -191,7 +191,12 @@ blocks are noted where they matter:
   opacity/blur knob - flat surfaces per the design system), grid tiles are
   `NooGridCard`, swipe actions are `NooSwipeAction`, and per-item sync
   status is `NooFileRow`/`NooFileTableRow`'s built-in `NooStatusIcon` list
-  instead of a corner badge.
+  instead of a corner badge. `NooBottomBar` later gained its own, unrelated
+  `NooBottomBarStyle.floating` (Settings → Appearance → "Bottom bar") -
+  don't confuse the two: this one is still flat/non-blurred, just inset
+  with a `line` border instead of edge to edge (no opacity/blur knob
+  either). The host `Scaffold` needs `extendBody: true` while it's active
+  (`main.dart` already wires this off `SettingsController.bottomBarStyle`).
 - [`SyncedHeaderScaffold`](../../lib/widgets/synced_header_scaffold.dart) —
   the pull-to-sync `CustomScrollView` header with the persistent sync-status
   chip and pull-to-refresh gesture/spinner. Every screen (including

lib/main.dart

@@ -472,6 +472,7 @@ class _MainShellViewState extends State<MainShellView> {
       );
     } else {
       final navStyle = NooLayout.navStyle(context);
+      final bottomBarStyle = settings.bottomBarStyle;
       scaffold = Scaffold(
         backgroundColor: colors.bg,
         drawerScrimColor: colors.scrim,
@@ -479,6 +480,10 @@ class _MainShellViewState extends State<MainShellView> {
             ? AppTopBar(style: navStyle, tab: selectedTab)
             : null,
         drawer: pickRequest == null ? const AppDrawer() : null,
+        // Floating needs the body to draw behind the bar's own transparent
+        // margin (see NooBottomBarStyle's doc comment) instead of stopping
+        // short of it like attached does.
+        extendBody: bottomBarStyle == NooBottomBarStyle.floating,
         // Android-only extended Upload FAB - iOS uses the top bar's `plus`
         // instead (see AppTopBar). Stays mounted across every tab (picking
         // aside) and collapses to an icon-only circle off Files/Photos,
@@ -494,6 +499,7 @@ class _MainShellViewState extends State<MainShellView> {
         body: tabStack,
         bottomNavigationBar: BottomNavBar(
           style: navStyle,
+          barStyle: bottomBarStyle,
           tabs: pinnedTabs,
           selectedIndex: pinnedIndex,
           onDestinationSelected: (index) {

lib/providers/settings_controller.dart

@@ -3,6 +3,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 import '../models/app_tab.dart';
 import '../models/selection_action.dart';
 import '../theme/app_theme.dart';
+import '../widgets/noo/nav/noo_nav_style.dart';
 
 /// What swiping a Files list-view item left/right does, user-configurable
 /// in Settings.
@@ -30,6 +31,7 @@ class SettingsController extends ChangeNotifier {
   static const _prefDefaultTab = 'ui_default_tab';
   static const _prefSwipeLeftAction = 'ui_swipe_left_action';
   static const _prefSwipeRightAction = 'ui_swipe_right_action';
+  static const _prefBottomBarStyle = 'ui_bottom_bar_style';
   static const _prefAmoledDark = 'ui_amoled_dark';
   static const _prefMediaProgressBarStyle = 'ui_media_progress_bar_style';
   static const _prefTapTabToScrollTop = 'ui_tap_tab_to_scroll_top';
@@ -39,6 +41,7 @@ class SettingsController extends ChangeNotifier {
 
   Color _seedColor = AppTheme.defaultAccent;
   ThemeMode _themeMode = ThemeMode.system;
+  NooBottomBarStyle _bottomBarStyle = NooBottomBarStyle.attached;
   bool _useDynamicColor = true;
   bool _amoledDark = false;
   MediaProgressBarStyle _mediaProgressBarStyle = MediaProgressBarStyle.wavy;
@@ -80,6 +83,7 @@ class SettingsController extends ChangeNotifier {
 
   Color get seedColor => _seedColor;
   ThemeMode get themeMode => _themeMode;
+  NooBottomBarStyle get bottomBarStyle => _bottomBarStyle;
   bool get useDynamicColor => _useDynamicColor;
   bool get amoledDark => _amoledDark;
   MediaProgressBarStyle get mediaProgressBarStyle => _mediaProgressBarStyle;
@@ -115,6 +119,13 @@ class SettingsController extends ChangeNotifier {
           orElse: () => ThemeMode.system,
         );
       }
+      final bottomBarStyleName = prefs.getString(_prefBottomBarStyle);
+      if (bottomBarStyleName != null) {
+        _bottomBarStyle = NooBottomBarStyle.values.firstWhere(
+          (s) => s.name == bottomBarStyleName,
+          orElse: () => _bottomBarStyle,
+        );
+      }
       _useDynamicColor =
           prefs.getBool(_prefUseDynamicColor) ?? _useDynamicColor;
       _amoledDark = prefs.getBool(_prefAmoledDark) ?? _amoledDark;
@@ -256,6 +267,13 @@ class SettingsController extends ChangeNotifier {
     _prefsFuture.then((p) => p.setString(_prefThemeMode, mode.name));
   }
 
+  void setBottomBarStyle(NooBottomBarStyle style) {
+    if (_bottomBarStyle == style) return;
+    _bottomBarStyle = style;
+    notifyListeners();
+    _prefsFuture.then((p) => p.setString(_prefBottomBarStyle, style.name));
+  }
+
   void setTabOrder(List<AppTab> order) {
     _tabOrder = order;
     notifyListeners();

lib/widgets/bottom_nav_bar.dart

@@ -9,6 +9,7 @@ import 'noo/nav/noo_bottom_bar.dart';
 /// drawer's "More" list that isn't one of the pinned [tabs].
 class BottomNavBar extends StatelessWidget {
   final NooNavStyle style;
+  final NooBottomBarStyle barStyle;
   final List<AppTab> tabs;
   final int selectedIndex;
   final ValueChanged<int> onDestinationSelected;
@@ -16,6 +17,7 @@ class BottomNavBar extends StatelessWidget {
   const BottomNavBar({
     super.key,
     required this.style,
+    this.barStyle = NooBottomBarStyle.attached,
     required this.tabs,
     required this.selectedIndex,
     required this.onDestinationSelected,
@@ -25,6 +27,7 @@ class BottomNavBar extends StatelessWidget {
   Widget build(BuildContext context) {
     return NooBottomBar(
       style: style,
+      barStyle: barStyle,
       destinations: [
         for (final tab in tabs)
           NooNavDestination(icon: tab.icon, label: tab.label),

lib/widgets/noo/nav/noo_bottom_bar.dart

@@ -5,8 +5,11 @@ import 'noo_nav_style.dart';
 export 'noo_nav_style.dart';
 
 /// Android indicator geometry, shared between the sliding pill and each
-/// item's own icon box so they line up exactly.
-const double _kAndroidPillTop = 14;
+/// item's own icon box so they line up exactly. Floating's own top offset
+/// is shorter than attached's - its row is 8px shorter overall (72 vs 80)
+/// and there's no edge-to-edge safe-area strip inside it eating into that.
+const double _kAttachedPillTop = 14;
+const double _kFloatingPillTop = 10;
 const double _kAndroidPillWidth = 56;
 const double _kAndroidPillHeight = 32;
 
@@ -23,11 +26,21 @@ const double _kAndroidPillHeight = 32;
 ///   56x32 accent-soft pill that slides between tabs as selection moves,
 ///   rather than popping in/out on the destination item itself.
 ///
+/// [barStyle] (user-configurable in Settings, Appearance) picks between
+/// that edge-to-edge [NooBottomBarStyle.attached] bar and
+/// [NooBottomBarStyle.floating] - inset 16px from both side edges, 28px
+/// corners, a 1px `line` border instead of a shadow (see that enum's own
+/// doc comment for why). Floating's Android row is 8px shorter (72 vs 80)
+/// and drops its idle tabs' reserved label space - with no label to leave
+/// room for, an idle icon just centers in the whole button and renders a
+/// touch bigger (27 vs 24px) instead of sitting high with a gap under it.
 /// The home indicator / gesture bar area below the row comes from the
 /// bottom safe-area inset rather than a fixed 34/20px spacer, so it's
-/// right on every device. Meant for `Scaffold.bottomNavigationBar`.
+/// right on every device. Meant for `Scaffold.bottomNavigationBar` - the
+/// host `Scaffold` needs `extendBody: true` while floating.
 class NooBottomBar extends StatelessWidget {
   final NooNavStyle style;
+  final NooBottomBarStyle barStyle;
   final List<NooNavDestination> destinations;
   final int selectedIndex;
   final ValueChanged<int> onSelected;
@@ -35,6 +48,7 @@ class NooBottomBar extends StatelessWidget {
   const NooBottomBar({
     super.key,
     required this.style,
+    this.barStyle = NooBottomBarStyle.attached,
     required this.destinations,
     required this.selectedIndex,
     required this.onSelected,
@@ -44,8 +58,31 @@ class NooBottomBar extends StatelessWidget {
   Widget build(BuildContext context) {
     final colors = context.nooColors;
     final ios = style == NooNavStyle.ios;
+    final floating = barStyle == NooBottomBarStyle.floating;
 
-    final row = ios ? _buildIosRow() : _buildAndroidRow(colors);
+    final row = ios
+        ? _buildIosRow()
+        : _buildAndroidRow(colors, floating: floating);
+    final barHeight = ios ? (floating ? 64.0 : 50.0) : (floating ? 72.0 : 80.0);
+
+    if (floating) {
+      return SafeArea(
+        top: false,
+        child: Padding(
+          padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
+          child: Container(
+            height: barHeight,
+            clipBehavior: Clip.antiAlias,
+            decoration: BoxDecoration(
+              color: colors.surface,
+              border: Border.all(color: colors.line),
+              borderRadius: BorderRadius.circular(28),
+            ),
+            child: row,
+          ),
+        ),
+      );
+    }
 
     return Container(
       decoration: BoxDecoration(
@@ -54,7 +91,7 @@ class NooBottomBar extends StatelessWidget {
       ),
       child: SafeArea(
         top: false,
-        child: SizedBox(height: ios ? 50 : 80, child: row),
+        child: SizedBox(height: barHeight, child: row),
       ),
     );
   }
@@ -75,7 +112,8 @@ class NooBottomBar extends StatelessWidget {
     );
   }
 
-  Widget _buildAndroidRow(NooColors colors) {
+  Widget _buildAndroidRow(NooColors colors, {required bool floating}) {
+    final pillTop = floating ? _kFloatingPillTop : _kAttachedPillTop;
     return LayoutBuilder(
       builder: (context, constraints) {
         final itemWidth = constraints.maxWidth / destinations.length;
@@ -84,7 +122,7 @@ class NooBottomBar extends StatelessWidget {
             AnimatedPositioned(
               duration: NooMotion.base,
               curve: NooMotion.ease,
-              top: _kAndroidPillTop,
+              top: pillTop,
               left:
                   itemWidth * selectedIndex +
                   (itemWidth - _kAndroidPillWidth) / 2,
@@ -105,6 +143,7 @@ class NooBottomBar extends StatelessWidget {
                     child: _AndroidItem(
                       destination: destinations[i],
                       selected: i == selectedIndex,
+                      floating: floating,
                       onTap: () => onSelected(i),
                     ),
                   ),
@@ -165,24 +204,69 @@ class _IosItem extends StatelessWidget {
 }
 
 /// Icon (over the shared sliding pill, drawn separately by [NooBottomBar])
-/// with its label always below it - the label's space is reserved
-/// whether or not it's showing (only its opacity changes), so the icon
-/// never shifts vertically as selection changes, and stays aligned with
-/// the pill's fixed [_kAndroidPillTop]/[_kAndroidPillHeight].
+/// with its label below it. Attached always reserves the label's space
+/// (just invisible when idle, per [_kAttachedPillTop]'s doc comment on
+/// [NooBottomBar]) so the icon never shifts vertically as selection
+/// changes. Floating drops that reserved space when idle instead: there's
+/// no label to leave room for, so the icon centers in the whole button and
+/// renders a touch bigger.
 class _AndroidItem extends StatelessWidget {
   final NooNavDestination destination;
   final bool selected;
+  final bool floating;
   final VoidCallback onTap;
 
   const _AndroidItem({
     required this.destination,
     required this.selected,
+    required this.floating,
     required this.onTap,
   });
 
   @override
   Widget build(BuildContext context) {
     final colors = context.nooColors;
+    final iconColor = selected ? colors.accentText : colors.fg2;
+
+    final Widget content;
+    if (floating && !selected) {
+      content = Center(
+        child: Icon(destination.icon, size: 27, color: iconColor),
+      );
+    } else {
+      content = Padding(
+        padding: EdgeInsets.only(
+          top: floating ? _kFloatingPillTop : _kAttachedPillTop,
+        ),
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.start,
+          children: [
+            SizedBox(
+              height: _kAndroidPillHeight,
+              child: Center(
+                child: Icon(destination.icon, size: 24, color: iconColor),
+              ),
+            ),
+            const SizedBox(height: 4),
+            AnimatedOpacity(
+              duration: NooMotion.base,
+              curve: NooMotion.ease,
+              opacity: selected ? 1 : 0,
+              child: Text(
+                destination.label,
+                maxLines: 1,
+                overflow: TextOverflow.ellipsis,
+                style: NooText.navLabelActive.copyWith(
+                  height: 1,
+                  color: colors.fg1,
+                ),
+              ),
+            ),
+          ],
+        ),
+      );
+    }
+
     return Semantics(
       button: true,
       selected: selected,
@@ -190,39 +274,7 @@ class _AndroidItem extends StatelessWidget {
       child: GestureDetector(
         behavior: HitTestBehavior.opaque,
         onTap: onTap,
-        child: Padding(
-          padding: const EdgeInsets.only(top: _kAndroidPillTop),
-          child: Column(
-            mainAxisAlignment: MainAxisAlignment.start,
-            children: [
-              SizedBox(
-                height: _kAndroidPillHeight,
-                child: Center(
-                  child: Icon(
-                    destination.icon,
-                    size: 24,
-                    color: selected ? colors.accentText : colors.fg2,
-                  ),
-                ),
-              ),
-              const SizedBox(height: 4),
-              AnimatedOpacity(
-                duration: NooMotion.base,
-                curve: NooMotion.ease,
-                opacity: selected ? 1 : 0,
-                child: Text(
-                  destination.label,
-                  maxLines: 1,
-                  overflow: TextOverflow.ellipsis,
-                  style: NooText.navLabelActive.copyWith(
-                    height: 1,
-                    color: colors.fg1,
-                  ),
-                ),
-              ),
-            ],
-          ),
-        ),
+        child: content,
       ),
     );
   }

lib/widgets/noo/nav/noo_nav_style.dart

@@ -17,6 +17,18 @@ enum NooNavStyle {
       };
 }
 
+/// How [NooBottomBar] sits on the screen - user-configurable in Settings
+/// (Appearance). [attached] is the original edge-to-edge bar with no
+/// side/bottom margin. [floating] insets it 16px from both side edges and
+/// clear of the bottom safe area, rounded (28px - the same radius the
+/// sheet top/drawer edge use) rather than square, with a 1px `line` border
+/// standing in for elevation instead of a shadow (product UI stays flat -
+/// DESIGN_SYSTEM.md 1.4 - so this is the one place that border does that
+/// job). The host `Scaffold` needs `extendBody: true` while floating, so
+/// its body scrolls behind the bar's transparent margin instead of
+/// stopping short of it like [attached] does.
+enum NooBottomBarStyle { attached, floating }
+
 /// One destination in a [NooBottomBar]. Data-agnostic on purpose - the app
 /// maps its own tab model (e.g. `AppTab`) onto these.
 @immutable

lib/widgets/settings/settings_appearance.dart

@@ -7,6 +7,7 @@ import '../../theme/design_tokens.dart';
 import '../noo/core/noo_segmented_control.dart';
 import '../noo/core/noo_toggle.dart';
 import '../noo/lists/noo_settings_row.dart';
+import '../noo/nav/noo_nav_style.dart';
 import '../noo/noo_layout.dart';
 import '../noo/overlays/noo_dialog.dart';
 import '../noo/overlays/noo_sheet.dart';
@@ -47,7 +48,10 @@ class SettingsAppearanceSection extends StatelessWidget {
       children: [
         SettingsSection(
           title: 'Appearance',
-          children: [_ThemeRow(settings: settings)],
+          children: [
+            _ThemeRow(settings: settings),
+            _BottomBarStyleRow(settings: settings),
+          ],
         ),
         const SizedBox(height: NooSpace.xl),
         SettingsSection(
@@ -156,6 +160,64 @@ class _ThemeRow extends StatelessWidget {
   }
 }
 
+/// The "Bottom bar" row: same "label, then a full-width segmented control
+/// below it" shape as [_ThemeRow] right above it. Attached is the original
+/// edge-to-edge bar; floating insets it from both side/bottom edges with
+/// rounded corners - see [NooBottomBarStyle]'s own doc comment for the
+/// full visual rationale.
+class _BottomBarStyleRow extends StatelessWidget {
+  final SettingsController settings;
+
+  const _BottomBarStyleRow({required this.settings});
+
+  @override
+  Widget build(BuildContext context) {
+    final colors = context.nooColors;
+    return Material(
+      color: colors.surface,
+      child: Padding(
+        padding: const EdgeInsets.symmetric(
+          horizontal: NooSpace.md,
+          vertical: 12,
+        ),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              children: [
+                Icon(LucideIcons.panelBottom, size: 20, color: colors.fg2),
+                const SizedBox(width: 14),
+                Text(
+                  'Bottom bar',
+                  style: NooText.bodyL.copyWith(color: colors.fg1),
+                ),
+              ],
+            ),
+            const SizedBox(height: 12),
+            NooSegmentedControl<NooBottomBarStyle>(
+              fill: true,
+              value: settings.bottomBarStyle,
+              onChanged: settings.setBottomBarStyle,
+              options: const [
+                NooSegmentOption(
+                  value: NooBottomBarStyle.attached,
+                  icon: LucideIcons.panelBottom,
+                  label: 'Attached',
+                ),
+                NooSegmentOption(
+                  value: NooBottomBarStyle.floating,
+                  icon: LucideIcons.panelBottomOpen,
+                  label: 'Floating',
+                ),
+              ],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
 /// The current accent-color choice, shown as a small filled circle in the
 /// "Accent color" row - a wallpaper icon when following the OS's dynamic
 /// color instead of a fixed swatch.

test/widgets/noo/nav_test.dart

@@ -137,5 +137,80 @@ void main() {
       final labelCenter = tester.getCenter(find.text('Photos'));
       expect(labelCenter.dy, greaterThan(iconCenter.dy));
     });
+
+    testNooWidgets('floating: inset, rounded, bordered - not edge to edge', (
+      tester,
+      theme,
+      c,
+    ) async {
+      await pumpNoo(
+        tester,
+        SizedBox(
+          width: 360,
+          height: 96,
+          child: NooBottomBar(
+            style: NooNavStyle.android,
+            barStyle: NooBottomBarStyle.floating,
+            destinations: _destinations,
+            selectedIndex: 0,
+            onSelected: (_) {},
+          ),
+        ),
+        theme: theme,
+      );
+      final pillFinder = find.descendant(
+        of: find.byType(NooBottomBar),
+        matching: find.byWidgetPredicate(
+          (w) => w is Container && w.decoration != null,
+        ),
+      );
+      final container = tester.widget<Container>(pillFinder);
+      final decoration = container.decoration as BoxDecoration;
+      expect(decoration.borderRadius, BorderRadius.circular(28));
+      expect(decoration.border, Border.all(color: c.line));
+      // Inset from both side edges of the bar's own host box, not flush
+      // against it - both rects are in the same (global) coordinate space,
+      // so comparing them directly still holds regardless of where
+      // `pumpNoo`'s own harness centers that host box on screen.
+      final hostRect = tester.getRect(find.byType(NooBottomBar));
+      final rect = tester.getRect(pillFinder);
+      expect(rect.left, greaterThan(hostRect.left));
+      expect(rect.right, lessThan(hostRect.right));
+    });
+
+    testNooWidgets(
+      'floating android: idle icon has no reserved label space and is '
+      'bigger than the active one',
+      (tester, theme, c) async {
+        await pumpNoo(
+          tester,
+          SizedBox(
+            width: 360,
+            height: 96,
+            child: NooBottomBar(
+              style: NooNavStyle.android,
+              barStyle: NooBottomBarStyle.floating,
+              destinations: _destinations,
+              selectedIndex: 0,
+              onSelected: (_) {},
+            ),
+          ),
+          theme: theme,
+        );
+        // Unlike attached, an idle floating tab has no label at all - not
+        // just an invisible one - so there's nothing to find here.
+        expect(find.text('Photos'), findsNothing);
+        expect(
+          find.ancestor(
+            of: find.byIcon(LucideIcons.images),
+            matching: find.byType(AnimatedOpacity),
+          ),
+          findsNothing,
+        );
+        final activeIcon = tester.widget<Icon>(find.byIcon(LucideIcons.folder));
+        final idleIcon = tester.widget<Icon>(find.byIcon(LucideIcons.images));
+        expect(idleIcon.size, greaterThan(activeIcon.size!));
+      },
+    );
   });
 }