diff --git a/src/screens/Messages/components/splitView/MessagesSplitViewLayout.tsx b/src/screens/Messages/components/splitView/MessagesSplitViewLayout.tsx
index 212ebb5440..8619745d32 100644
--- a/src/screens/Messages/components/splitView/MessagesSplitViewLayout.tsx
+++ b/src/screens/Messages/components/splitView/MessagesSplitViewLayout.tsx
@@ -12,8 +12,11 @@ import {IS_WEB} from '#/env'
 import {ChatList, Header as ChatListHeader} from '../../ChatList'
 import {SplitViewProvider} from './context'
 
+const CENTER_COLUMN_WIDTH = 600
+const LEFT_NAV_FULL_WIDTH = 245
 const LEFT_NAV_MINIMAL_WIDTH = 86
-const RIGHT_NAV_WIDTH = 330 + 28
+const RIGHT_NAV_FULL_WIDTH = 330 + 28
+const RIGHT_NAV_MINIMAL_WIDTH = 280 + 28
 
 type LayoutProps = ScreenLayoutArgs<
   AllNavigatorParams,
@@ -44,20 +47,26 @@ function MessagesSplitViewLayout({children, navigation, route}: LayoutProps) {
       ? route?.params?.conversation
       : undefined
 
+  const leftNavWidth = centerColumnOffset
+    ? LEFT_NAV_MINIMAL_WIDTH
+    : LEFT_NAV_FULL_WIDTH
+  const rightNavWidth = centerColumnOffset
+    ? RIGHT_NAV_MINIMAL_WIDTH
+    : RIGHT_NAV_FULL_WIDTH
+
+  const containerWidth =
+    leftNavWidth - LEFT_NAV_MINIMAL_WIDTH + CENTER_COLUMN_WIDTH + rightNavWidth
+
   return (
     <View
       style={[
         a.flex_1,
         a.flex_row,
         a.mx_auto,
-        {maxWidth: centerColumnOffset ? 900 : 950},
+        {maxWidth: containerWidth},
         {
           transform: [
-            {
-              translateX: centerColumnOffset
-                ? LEFT_NAV_MINIMAL_WIDTH / 2
-                : RIGHT_NAV_WIDTH / 2,
-            },
+            {translateX: LEFT_NAV_MINIMAL_WIDTH / 2},
             {translateX: web(SCROLLBAR_OFFSET) ?? 0},
           ],
         },
diff --git a/src/view/com/util/fab/FAB.web.tsx b/src/view/com/util/fab/FAB.web.tsx
index 976c19e7df..ac5b08701e 100644
--- a/src/view/com/util/fab/FAB.web.tsx
+++ b/src/view/com/util/fab/FAB.web.tsx
@@ -1,13 +1,13 @@
 import {View} from 'react-native'
 
-import {useWebMediaQueries} from '#/lib/hooks/useWebMediaQueries'
+import {useBreakpoints} from '#/alf'
 import {FABInner, type FABProps} from './FABInner'
 
-export const FAB = (_opts: FABProps) => {
-  const {isDesktop} = useWebMediaQueries()
+export const FAB = (props: FABProps) => {
+  const {gtMobile} = useBreakpoints()
 
-  if (!isDesktop) {
-    return <FABInner {..._opts} />
+  if (!gtMobile) {
+    return <FABInner {...props} />
   }
 
   return <View />
diff --git a/src/view/shell/createNativeStackNavigatorWithAuth.tsx b/src/view/shell/createNativeStackNavigatorWithAuth.tsx
index 4df4a7ffd6..88cdffed59 100644
--- a/src/view/shell/createNativeStackNavigatorWithAuth.tsx
+++ b/src/view/shell/createNativeStackNavigatorWithAuth.tsx
@@ -200,7 +200,11 @@ function NativeStackNavigator({
       </View>
       {IS_WEB && (
         <>
-          {showBottomBar ? <BottomBarWeb /> : <DesktopLeftNav />}
+          {showBottomBar ? (
+            <BottomBarWeb />
+          ) : (
+            <DesktopLeftNav routeName={activeRoute.name} />
+          )}
           {!isMobile && <DesktopRightNav routeName={activeRoute.name} />}
         </>
       )}
diff --git a/src/view/shell/desktop/LeftNav.tsx b/src/view/shell/desktop/LeftNav.tsx
index 8ca25a8d5e..38d4dffb0e 100644
--- a/src/view/shell/desktop/LeftNav.tsx
+++ b/src/view/shell/desktop/LeftNav.tsx
@@ -8,8 +8,6 @@ import {useNavigation, useNavigationState} from '@react-navigation/native'
 
 import {useAccountSwitcher} from '#/lib/hooks/useAccountSwitcher'
 import {useOpenComposer} from '#/lib/hooks/useOpenComposer'
-import {usePalette} from '#/lib/hooks/usePalette'
-import {useWebMediaQueries} from '#/lib/hooks/useWebMediaQueries'
 import {getCurrentRoute, isTab} from '#/lib/routes/helpers'
 import {makeProfileLink} from '#/lib/routes/links'
 import {
@@ -30,7 +28,14 @@ import {LoadingPlaceholder} from '#/view/com/util/LoadingPlaceholder'
 import {PressableWithHover} from '#/view/com/util/PressableWithHover'
 import {UserAvatar} from '#/view/com/util/UserAvatar'
 import {NavSignupCard} from '#/view/shell/NavSignupCard'
-import {atoms as a, tokens, useLayoutBreakpoints, useTheme, web} from '#/alf'
+import {
+  atoms as a,
+  tokens,
+  useBreakpoints,
+  useLayoutBreakpoints,
+  useTheme,
+  web,
+} from '#/alf'
 import {Button, ButtonIcon, ButtonText} from '#/components/Button'
 import {type DialogControlProps} from '#/components/Dialog'
 import {ArrowBoxLeft_Stroke2_Corner0_Rounded as LeaveIcon} from '#/components/icons/ArrowBoxLeft'
@@ -81,7 +86,7 @@ import {router} from '../../../routes'
 
 const NAV_ICON_WIDTH = 28
 
-function ProfileCard() {
+function ProfileCard({minimal}: {minimal: boolean}) {
   const {currentAccount, accounts} = useSession()
   const {logoutEveryAccount} = useSessionApi()
   const {isLoading, data} = useProfilesQuery({
@@ -89,7 +94,6 @@ function ProfileCard() {
   })
   const profiles = data?.profiles
   const signOutPromptControl = Prompt.usePromptControl()
-  const {leftNavMinimal} = useLayoutBreakpoints()
   const {_} = useLingui()
   const t = useTheme()
 
@@ -106,7 +110,7 @@ function ProfileCard() {
   const {isActive: live} = useActorStatus(profile)
 
   return (
-    <View style={[a.my_md, !leftNavMinimal && [a.w_full, a.align_start]]}>
+    <View style={[a.my_md, !minimal && [a.w_full, a.align_start]]}>
       {!isLoading && profile ? (
         <Menu.Root>
           <Menu.Trigger label={_(msg`Switch accounts`)}>
@@ -125,7 +129,7 @@ function ProfileCard() {
                     a.align_center,
                     a.flex_row,
                     {gap: 6},
-                    !leftNavMinimal && [a.pl_lg, a.pr_md],
+                    !minimal && [a.pl_lg, a.pr_md],
                   ]}>
                   <View
                     style={[
@@ -138,8 +142,8 @@ function ProfileCard() {
                       a.z_10,
                       active && {
                         transform: [
-                          {scale: !leftNavMinimal ? 2 / 3 : 0.8},
-                          {translateX: !leftNavMinimal ? -22 : 0},
+                          {scale: !minimal ? 2 / 3 : 0.8},
+                          {translateX: !minimal ? -22 : 0},
                         ],
                       },
                     ]}>
@@ -150,7 +154,7 @@ function ProfileCard() {
                       live={live}
                     />
                   </View>
-                  {!leftNavMinimal && (
+                  {!minimal && (
                     <>
                       <View
                         style={[
@@ -203,7 +207,7 @@ function ProfileCard() {
         <LoadingPlaceholder
           width={size}
           height={size}
-          style={[{borderRadius: size}, !leftNavMinimal && a.ml_lg]}
+          style={[{borderRadius: size}, !minimal && a.ml_lg]}
         />
       )}
       <Prompt.Basic
@@ -374,12 +378,21 @@ interface NavItemProps {
   icon: JSX.Element
   iconFilled: JSX.Element
   label: string
+  minimal: boolean
 }
-function NavItem({count, hasNew, href, icon, iconFilled, label}: NavItemProps) {
+function NavItem({
+  count,
+  hasNew,
+  href,
+  icon,
+  iconFilled,
+  label,
+  minimal,
+}: NavItemProps) {
   const t = useTheme()
   const {_} = useLingui()
   const {currentAccount} = useSession()
-  const {leftNavMinimal} = useLayoutBreakpoints()
+
   const [pathName] = useMemo(() => router.matchPath(href), [href])
   const currentRouteInfo = useNavigationState(state => {
     if (!state) {
@@ -417,7 +430,7 @@ function NavItem({count, hasNew, href, icon, iconFilled, label}: NavItemProps) {
         a.flex_row,
         a.align_center,
         a.p_md,
-        a.rounded_sm,
+        a.rounded_full,
         a.gap_sm,
         a.outline_inset_1,
         a.transition_color,
@@ -438,9 +451,9 @@ function NavItem({count, hasNew, href, icon, iconFilled, label}: NavItemProps) {
             width: 24,
             height: 24,
           },
-          leftNavMinimal && {
-            width: 40,
-            height: 40,
+          minimal && {
+            width: 30,
+            height: 30,
           },
         ]}>
         {isCurrent ? iconFilled : icon}
@@ -479,7 +492,7 @@ function NavItem({count, hasNew, href, icon, iconFilled, label}: NavItemProps) {
                   paddingVertical: 1,
                   minWidth: 16,
                 },
-                leftNavMinimal && [
+                minimal && [
                   {
                     top: '10%',
                     left: count.length === 1 ? 20 : 16,
@@ -502,7 +515,7 @@ function NavItem({count, hasNew, href, icon, iconFilled, label}: NavItemProps) {
                 right: -2,
                 top: -4,
               },
-              leftNavMinimal && {
+              minimal && {
                 right: 4,
                 top: 2,
               },
@@ -510,7 +523,7 @@ function NavItem({count, hasNew, href, icon, iconFilled, label}: NavItemProps) {
           />
         ) : null}
       </View>
-      {!leftNavMinimal && (
+      {!minimal && (
         <Text style={[a.text_xl, isCurrent ? a.font_bold : a.font_normal]}>
           {label}
         </Text>
@@ -519,12 +532,11 @@ function NavItem({count, hasNew, href, icon, iconFilled, label}: NavItemProps) {
   )
 }
 
-function ComposeBtn() {
+function ComposeBtn({minimal}: {minimal: boolean}) {
   const {currentAccount} = useSession()
   const {getState} = useNavigation()
   const {openComposer} = useOpenComposer()
   const {_} = useLingui()
-  const {leftNavMinimal} = useLayoutBreakpoints()
   const [isFetchingHandle, setIsFetchingHandle] = useState(false)
   const fetchHandle = useFetchHandle()
 
@@ -564,31 +576,28 @@ function ComposeBtn() {
   const onPressCompose = async () =>
     openComposer({mention: await getProfileHandle(), logContext: 'Fab'})
 
-  if (leftNavMinimal) {
-    return null
-  }
-
   return (
-    <View style={[a.flex_row, a.pl_md, a.pt_xl]}>
+    <View style={minimal ? [a.p_sm] : [a.flex_row, a.pl_md, a.pt_xl]}>
       <Button
         disabled={isFetchingHandle}
         label={_(msg`Compose new post`)}
         onPress={() => void onPressCompose()}
         size="large"
-        variant="solid"
         color="primary"
-        style={[a.rounded_full]}>
-        <ButtonIcon icon={EditBig} position="left" />
-        <ButtonText>
-          <Trans context="action">New post</Trans>
-        </ButtonText>
+        style={[a.rounded_full, minimal && {width: 56, height: 56}]}>
+        <ButtonIcon icon={EditBig} size={minimal ? 'lg' : 'sm'} />
+        {!minimal && (
+          <ButtonText>
+            <Trans context="action">New post</Trans>
+          </ButtonText>
+        )}
       </Button>
     </View>
   )
 }
 
-function ChatNavItem() {
-  const pal = usePalette('default')
+function ChatNavItem({minimal}: {minimal: boolean}) {
+  const t = useTheme()
   const {_} = useLingui()
   const numUnreadMessages = useUnreadMessageCount()
   const aa = useAgeAssurance()
@@ -596,14 +605,19 @@ function ChatNavItem() {
   return (
     <NavItem
       href="/messages"
+      minimal={minimal}
       count={aa.flags.chatDisabled ? undefined : numUnreadMessages.numUnread}
       hasNew={aa.flags.chatDisabled ? false : numUnreadMessages.hasNew}
       icon={
-        <Message style={pal.text} aria-hidden={true} width={NAV_ICON_WIDTH} />
+        <Message
+          style={t.atoms.text}
+          aria-hidden={true}
+          width={NAV_ICON_WIDTH}
+        />
       }
       iconFilled={
         <MessageFilled
-          style={pal.text}
+          style={t.atoms.text}
           aria-hidden={true}
           width={NAV_ICON_WIDTH}
         />
@@ -613,15 +627,19 @@ function ChatNavItem() {
   )
 }
 
-export function DesktopLeftNav() {
+export function DesktopLeftNav({routeName}: {routeName: string}) {
   const {hasSession, currentAccount} = useSession()
-  const pal = usePalette('default')
   const {_} = useLingui()
-  const {isDesktop} = useWebMediaQueries()
-  const {leftNavMinimal, centerColumnOffset} = useLayoutBreakpoints()
+  const t = useTheme()
+  const {gtMobile} = useBreakpoints()
+  const isMessagesRelatedScreen = routeName.startsWith('Messages')
+  const {leftNavMinimal: leftNavMinimalBreakpoint, centerColumnOffset} =
+    useLayoutBreakpoints()
   const numUnreadNotifications = useUnreadNotifications()
 
-  if (!hasSession && !isDesktop) {
+  const leftNavMinimal = isMessagesRelatedScreen || leftNavMinimalBreakpoint
+
+  if (!hasSession && !gtMobile) {
     return null
   }
 
@@ -637,7 +655,11 @@ export function DesktopLeftNav() {
           transform: [
             {
               translateX:
-                -300 + (centerColumnOffset ? CENTER_COLUMN_OFFSET : 0),
+                -300 +
+                (centerColumnOffset ? CENTER_COLUMN_OFFSET : 0) +
+                (isMessagesRelatedScreen && !leftNavMinimalBreakpoint
+                  ? -130
+                  : 0),
             },
             {translateX: '-100%'},
             ...a.scrollbar_offset.transform,
@@ -645,7 +667,7 @@ export function DesktopLeftNav() {
         },
       ]}>
       {hasSession ? (
-        <ProfileCard />
+        <ProfileCard minimal={leftNavMinimal} />
       ) : !leftNavMinimal ? (
         <View style={[a.pt_xl]}>
           <NavSignupCard />
@@ -656,34 +678,36 @@ export function DesktopLeftNav() {
         <>
           <NavItem
             href="/"
+            minimal={leftNavMinimal}
             icon={
               <Home
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             iconFilled={
               <HomeFilled
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             label={_(msg`Home`)}
           />
           <NavItem
             href="/search"
+            minimal={leftNavMinimal}
             icon={
               <MagnifyingGlass
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
             }
             iconFilled={
               <MagnifyingGlassFilled
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
@@ -692,36 +716,38 @@ export function DesktopLeftNav() {
           />
           <NavItem
             href="/notifications"
+            minimal={leftNavMinimal}
             count={numUnreadNotifications}
             icon={
               <Bell
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             iconFilled={
               <BellFilled
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             label={_(msg`Notifications`)}
           />
-          <ChatNavItem />
+          <ChatNavItem minimal={leftNavMinimal} />
           <NavItem
             href="/feeds"
+            minimal={leftNavMinimal}
             icon={
               <Hashtag
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
             }
             iconFilled={
               <HashtagFilled
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
@@ -730,16 +756,17 @@ export function DesktopLeftNav() {
           />
           <NavItem
             href="/lists"
+            minimal={leftNavMinimal}
             icon={
               <List
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
             }
             iconFilled={
               <ListFilled
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
@@ -748,16 +775,17 @@ export function DesktopLeftNav() {
           />
           <NavItem
             href="/saved"
+            minimal={leftNavMinimal}
             icon={
               <Bookmark
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
             }
             iconFilled={
               <BookmarkFilled
-                style={pal.text}
+                style={t.atoms.text}
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
               />
@@ -771,42 +799,44 @@ export function DesktopLeftNav() {
           />
           <NavItem
             href={currentAccount ? makeProfileLink(currentAccount) : '/'}
+            minimal={leftNavMinimal}
             icon={
               <UserCircle
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             iconFilled={
               <UserCircleFilled
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             label={_(msg`Profile`)}
           />
           <NavItem
             href="/settings"
+            minimal={leftNavMinimal}
             icon={
               <Settings
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             iconFilled={
               <SettingsFilled
                 aria-hidden={true}
                 width={NAV_ICON_WIDTH}
-                style={pal.text}
+                style={t.atoms.text}
               />
             }
             label={_(msg`Settings`)}
           />
 
-          <ComposeBtn />
+          <ComposeBtn minimal={leftNavMinimal} />
         </>
       )}
     </View>
@@ -824,6 +854,7 @@ const styles = StyleSheet.create({
     // @ts-expect-error web only
     maxHeight: '100vh',
     overflowY: 'auto',
+    scrollbarWidth: 'thin',
   },
   leftNavWide: {
     width: 245,