diff --git a/src/features/navigation-bar/MaterialYouNavigation.ts b/src/features/navigation-bar/MaterialYouNavigation.ts
new file mode 100644
index 00000000..7168b15e
--- /dev/null
+++ b/src/features/navigation-bar/MaterialYouNavigation.ts
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+export const MATERIAL_YOU_NAVIGATION = {
+    railWidth: 88,
+    expandedWidth: 280,
+    bottomBarMinHeight: 80,
+    touchTarget: 48,
+    activeIndicatorRadius: 999,
+    landmarkLabel: 'Primary navigation',
+} as const;
diff --git a/src/features/navigation-bar/components/DefaultNavBar.tsx b/src/features/navigation-bar/components/DefaultNavBar.tsx
index 81ef7f7c..e37b7e1b 100644
--- a/src/features/navigation-bar/components/DefaultNavBar.tsx
+++ b/src/features/navigation-bar/components/DefaultNavBar.tsx
@@ -117,9 +117,11 @@ export function DefaultNavBar() {
                     pt: 'env(safe-area-inset-top)',
                     width: `calc(100% - ${actualNavBarWidth}px)`,
                     zIndex: theme.zIndex.drawer,
+                    borderBottom: '1px solid',
+                    borderColor: 'divider',
                 }}
             >
-                <Toolbar sx={{ position: 'relative' }}>
+                <Toolbar sx={{ position: 'relative', minHeight: { xs: 64, sm: 72 } }}>
                     {!isMobileWidth && (
                         <Stack
                             sx={{
@@ -130,7 +132,11 @@ export function DefaultNavBar() {
                                 alignItems: 'center',
                             }}
                         >
-                            <IconButton aria-label="open drawer" onClick={() => setIsCollapsed(false)} color="inherit">
+                            <IconButton
+                                aria-label="Expand navigation"
+                                onClick={() => setIsCollapsed(false)}
+                                color="inherit"
+                            >
                                 <MenuIcon />
                             </IconButton>
                         </Stack>
@@ -156,12 +162,13 @@ export function DefaultNavBar() {
                             </IconButton>
                         )}
                         <Typography
-                            variant="h5"
+                            variant="h6"
                             component="h1"
                             noWrap
                             sx={{
                                 textOverflow: 'ellipsis',
                                 flexGrow: 1,
+                                letterSpacing: '-0.01em',
                             }}
                         >
                             {title}
diff --git a/src/features/navigation-bar/components/DesktopSideBar.tsx b/src/features/navigation-bar/components/DesktopSideBar.tsx
index 8c83e6e3..a3dacd84 100644
--- a/src/features/navigation-bar/components/DesktopSideBar.tsx
+++ b/src/features/navigation-bar/components/DesktopSideBar.tsx
@@ -11,7 +11,6 @@ import List from '@mui/material/List';
 import IconButton from '@mui/material/IconButton';
 import ChevronLeftIcon from '@mui/icons-material/ChevronLeft';
 import ChevronRightIcon from '@mui/icons-material/ChevronRight';
-import Divider from '@mui/material/Divider';
 import { styled } from '@mui/material/styles';
 import { useCallback, useRef } from 'react';
 import Box from '@mui/material/Box';
@@ -20,21 +19,18 @@ import { useNavBarContext } from '@/features/navigation-bar/NavbarContext.tsx';
 import { useResizeObserver } from '@/base/hooks/useResizeObserver.tsx';
 import type { NavbarItem } from '@/features/navigation-bar/NavigationBar.types.ts';
 import { NavigationBarItem } from '@/features/navigation-bar/components/NavigationBarItem.tsx';
+import { MATERIAL_YOU_NAVIGATION } from '@/features/navigation-bar/MaterialYouNavigation.ts';
 
 const DrawerHeader = styled('div')(({ theme }) => ({
     display: 'flex',
     alignItems: 'center',
     justifyContent: 'flex-end',
-    padding: theme.spacing(0, 1),
+    minHeight: 72,
+    padding: theme.spacing(1),
     // necessary for content to be below app bar
     ...theme.mixins.toolbar,
 }));
 
-const MIN_WIDTH_COLLAPSED = undefined;
-const MAX_WIDTH_COLLAPSED = 120;
-const MIN_WIDTH_EXTENDED = 240;
-const MAX_WIDTH_EXTENDED = 400;
-
 export const DesktopSideBar = ({ navBarItems }: { navBarItems: NavbarItem[] }) => {
     const { isCollapsed, setIsCollapsed, navBarWidth, setNavBarWidth } = useNavBarContext();
     const getOptionForDirection = useGetOptionForDirection();
@@ -52,11 +48,15 @@ export const DesktopSideBar = ({ navBarItems }: { navBarItems: NavbarItem[] }) =
                 width: navBarWidth,
                 '& .MuiDrawer-paper': {
                     zIndex: (theme) => theme.zIndex.drawer - 1,
+                    overflowX: 'hidden',
+                    transition: (theme) => theme.transitions.create('width'),
                 },
             }}
             slotProps={{
                 paper: {
                     ref,
+                    component: 'nav',
+                    'aria-label': MATERIAL_YOU_NAVIGATION.landmarkLabel,
                 },
             }}
         >
@@ -64,17 +64,19 @@ export const DesktopSideBar = ({ navBarItems }: { navBarItems: NavbarItem[] }) =
                 sx={{
                     pt: 'env(safe-area-inset-top)',
                     pl: 'env(safe-area-inset-left)',
-                    minWidth: isCollapsed ? MIN_WIDTH_COLLAPSED : MIN_WIDTH_EXTENDED,
-                    maxWidth: isCollapsed ? MAX_WIDTH_COLLAPSED : MAX_WIDTH_EXTENDED,
+                    width: isCollapsed
+                        ? MATERIAL_YOU_NAVIGATION.railWidth
+                        : MATERIAL_YOU_NAVIGATION.expandedWidth,
                 }}
             >
-                <DrawerHeader>
-                    <IconButton onClick={() => setIsCollapsed(true)}>
-                        {getOptionForDirection(<ChevronLeftIcon />, <ChevronRightIcon />)}
-                    </IconButton>
+                <DrawerHeader sx={{ justifyContent: isCollapsed ? 'center' : 'flex-end' }}>
+                    {!isCollapsed && (
+                        <IconButton aria-label="Collapse navigation" onClick={() => setIsCollapsed(true)}>
+                            {getOptionForDirection(<ChevronLeftIcon />, <ChevronRightIcon />)}
+                        </IconButton>
+                    )}
                 </DrawerHeader>
-                <Divider />
-                <List sx={{ p: 1 }} dense={isCollapsed}>
+                <List sx={{ px: 1.5, py: 1, display: 'grid', gap: 0.5 }} dense={isCollapsed}>
                     {navBarItems.map((navBarItem) => (
                         <NavigationBarItem key={navBarItem.path} {...navBarItem} />
                     ))}
diff --git a/src/features/navigation-bar/components/MobileBottomBar.tsx b/src/features/navigation-bar/components/MobileBottomBar.tsx
index 8f068c97..c8dda55f 100644
--- a/src/features/navigation-bar/components/MobileBottomBar.tsx
+++ b/src/features/navigation-bar/components/MobileBottomBar.tsx
@@ -16,6 +16,7 @@ import { useNavBarContext } from '@/features/navigation-bar/NavbarContext.tsx';
 import type { NavbarItem } from '@/features/navigation-bar/NavigationBar.types.ts';
 import { NavigationBarItem } from '@/features/navigation-bar/components/NavigationBarItem.tsx';
 import Stack from '@mui/material/Stack';
+import { MATERIAL_YOU_NAVIGATION } from '@/features/navigation-bar/MaterialYouNavigation.ts';
 
 export const MobileBottomBar = ({ navBarItems }: { navBarItems: NavbarItem[] }) => {
     const theme = useTheme();
@@ -30,6 +31,8 @@ export const MobileBottomBar = ({ navBarItems }: { navBarItems: NavbarItem[] })
 
     return (
         <Paper
+            component="nav"
+            aria-label={MATERIAL_YOU_NAVIGATION.landmarkLabel}
             ref={ref}
             sx={{
                 position: 'fixed',
@@ -40,15 +43,18 @@ export const MobileBottomBar = ({ navBarItems }: { navBarItems: NavbarItem[] })
                 pl: 'env(safe-area-inset-left)',
                 pr: 'env(safe-area-inset-right)',
                 zIndex: theme.zIndex.drawer - 1,
+                minHeight: MATERIAL_YOU_NAVIGATION.bottomBarMinHeight,
+                borderRadius: '28px 28px 0 0',
+                backgroundColor: 'background.paper',
             }}
             style={{
                 ...(theme.applyStyles('dark', {
                     '--Paper-overlay': 'unset',
                 }) as CSSProperties),
             }}
-            elevation={3}
+            elevation={0}
         >
-            <Stack sx={{ flexDirection: 'row' }}>
+            <Stack sx={{ minHeight: MATERIAL_YOU_NAVIGATION.bottomBarMinHeight, flexDirection: 'row', px: 0.5 }}>
                 {navBarItems.map((item) => (
                     <NavigationBarItem
                         key={item.path}
@@ -56,7 +62,7 @@ export const MobileBottomBar = ({ navBarItems }: { navBarItems: NavbarItem[] })
                         slots={{
                             listItemLink: {
                                 sx: {
-                                    py: 1,
+                                    py: 0.75,
                                 },
                             },
                         }}
diff --git a/src/features/navigation-bar/components/NavigationBarItem.tsx b/src/features/navigation-bar/components/NavigationBarItem.tsx
index cc62a738..5e8b7811 100644
--- a/src/features/navigation-bar/components/NavigationBarItem.tsx
+++ b/src/features/navigation-bar/components/NavigationBarItem.tsx
@@ -21,6 +21,7 @@ import Badge from '@mui/material/Badge';
 import Typography from '@mui/material/Typography';
 import { useLingui } from '@lingui/react/macro';
 import { useNavBarContext } from '@/features/navigation-bar/NavbarContext.tsx';
+import { MATERIAL_YOU_NAVIGATION } from '@/features/navigation-bar/MaterialYouNavigation.ts';
 
 export const NavigationBarItem = ({
     path,
@@ -49,8 +50,20 @@ export const NavigationBarItem = ({
 
     const { listItemProps, listItemIconProps } = useMemo(
         () => ({
-            listItemProps: isCollapsed ? { p: 0.5, display: 'flex', flexDirection: 'column' } : {},
-            listItemIconProps: isCollapsed ? { justifyContent: 'center' } : {},
+            listItemProps: isCollapsed
+                ? { px: 0.5, py: 0.25, display: 'flex', flexDirection: 'column', gap: 0.25 }
+                : { px: 1.5, py: 1 },
+            listItemIconProps: isCollapsed
+                ? {
+                      width: 64,
+                      minWidth: 64,
+                      height: 32,
+                      borderRadius: MATERIAL_YOU_NAVIGATION.activeIndicatorRadius,
+                      justifyContent: 'center',
+                      alignItems: 'center',
+                      backgroundColor: isActive ? 'primary.main' : 'transparent',
+                  }
+                : { minWidth: MATERIAL_YOU_NAVIGATION.touchTarget },
         }),
         [isCollapsed],
     );
@@ -59,7 +72,15 @@ export const NavigationBarItem = ({
         <ListItemLink
             {...slots?.listItemLink}
             selected={!isCollapsed && isActive}
-            sx={{ p: 0, m: 0, ...slots?.listItemLink?.sx }}
+            aria-current={isActive ? 'page' : undefined}
+            sx={{
+                minHeight: MATERIAL_YOU_NAVIGATION.touchTarget,
+                p: 0,
+                m: 0,
+                borderRadius: isCollapsed ? 2 : MATERIAL_YOU_NAVIGATION.activeIndicatorRadius,
+                overflow: 'hidden',
+                ...slots?.listItemLink?.sx,
+            }}
             to={path}
         >
             <CustomTooltip
@@ -77,9 +98,12 @@ export const NavigationBarItem = ({
                         <Badge badgeContent={badgeInfo?.count} color="primary">
                             <Icon
                                 sx={{
-                                    color: isActive ? 'primary.dark' : undefined,
-                                    ...theme.applyStyles('dark', {
-                                        color: isActive ? 'primary.light' : undefined,
+                                    color: isCollapsed && isActive ? 'primary.contrastText' : undefined,
+                                    ...(!isCollapsed && {
+                                        color: isActive ? 'primary.dark' : undefined,
+                                        ...theme.applyStyles('dark', {
+                                            color: isActive ? 'primary.light' : undefined,
+                                        }),
                                     }),
                                 }}
                             />
@@ -92,9 +116,13 @@ export const NavigationBarItem = ({
                                 lines={1}
                                 variant={isCollapsed ? 'caption' : undefined}
                                 sx={{
-                                    color: isActive ? 'primary.dark' : undefined,
-                                    ...theme.applyStyles('dark', {
-                                        color: isActive ? 'primary.light' : undefined,
+                                    color: isCollapsed && isActive ? 'text.primary' : undefined,
+                                    fontWeight: isActive ? 700 : 500,
+                                    ...(!isCollapsed && {
+                                        color: isActive ? 'primary.dark' : undefined,
+                                        ...theme.applyStyles('dark', {
+                                            color: isActive ? 'primary.light' : undefined,
+                                        }),
                                     }),
                                 }}
                             >
diff --git a/src/features/theme/services/MaterialYouNavigation.test.ts b/src/features/theme/services/MaterialYouNavigation.test.ts
new file mode 100644
index 00000000..a8d016a4
--- /dev/null
+++ b/src/features/theme/services/MaterialYouNavigation.test.ts
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import assert from 'node:assert/strict';
+import { describe, it } from 'node:test';
+import { MATERIAL_YOU_NAVIGATION } from '@/features/navigation-bar/MaterialYouNavigation.ts';
+
+describe('Material You navigation tokens', () => {
+    it('uses accessible rail and bottom-bar dimensions', () => {
+        assert.equal(MATERIAL_YOU_NAVIGATION.railWidth, 88);
+        assert.equal(MATERIAL_YOU_NAVIGATION.expandedWidth, 280);
+        assert.equal(MATERIAL_YOU_NAVIGATION.bottomBarMinHeight, 80);
+        assert.ok(MATERIAL_YOU_NAVIGATION.touchTarget >= 44);
+    });
+
+    it('uses pill indicators and an accessible landmark label', () => {
+        assert.equal(MATERIAL_YOU_NAVIGATION.activeIndicatorRadius, 999);
+        assert.equal(MATERIAL_YOU_NAVIGATION.landmarkLabel, 'Primary navigation');
+    });
+});