diff --git a/README.md b/README.md
index b207648..e030955 100644
--- a/README.md
+++ b/README.md
@@ -827,6 +827,9 @@ ow + toggle 시각 언어로 통일했습니다.
 - 상단 헤더도 더 `claw-code` 쪽 밀도로 줄였습니다. [ChatWindow.xaml](/E:/AX%20Copilot%20-%20Codex/src/AxCopilot/Views/ChatWindow.xaml) 에서 상단 탭 버튼의 폰트/패딩/코너를 다시 낮추고, 탭 그룹 래퍼와 제목 서브 바의 높이와 패딩도 함께 줄였습니다.
 - 같은 변경에서 대화 제목 폰트와 최대 폭, 빠른 스트립 버튼 규격, 프리뷰 토글 크기와 라벨도 더 작게 조정해 상단 보조 정보가 본문보다 덜 튀게 정리했습니다.
 - 업데이트: 2026-04-05 17:45 (KST)
+- 좌측 사이드바도 한 번에 더 `claw-code` 쪽 비율로 줄였습니다. [ChatWindow.xaml](/E:/AX%20Copilot%20-%20Codex/src/AxCopilot/Views/ChatWindow.xaml) 에서 헤더, 새 대화/검색 액션, 검색 편집기, 필터 드롭다운, 탭별 메뉴, 전체 삭제, 하단 사용자/설정 영역까지 패딩·폰트·아이콘·배지 크기를 전반적으로 낮췄습니다.
+- [ChatWindow.xaml.cs](/E:/AX%20Copilot%20-%20Codex/src/AxCopilot/Views/ChatWindow.xaml.cs) 에서는 실제 사이드바 폭을 `270 -> 248`로 줄이고, 대화 목록 카드의 패딩, 코너, 아이콘 열 폭, 제목/날짜/실행 메타 폰트, 편집 버튼 규격, 선택 액센트 바 두께도 함께 축소해 목록이 더 차분하게 보이도록 맞췄습니다.
+- 업데이트: 2026-04-05 17:53 (KST)
 - 좌측 패널과 하단 바도 `claw-code` 쪽 밀도로 다시 맞췄습니다. [ChatWindow.xaml](/E:/AX%20Copilot%20-%20Codex/src/AxCopilot/Views/ChatWindow.xaml) 에서 사이드바 폭을 줄이고, 헤더 앱 배지를 강조색 채운 정사각형 대신 `HintBackground + BorderColor` 기반의 작은 배지형으로 바꿨습니다.
 - `새 대화`, `검색`, `작업 유형/워크스페이스`, 하단 사용자 영역, 삭제 영역까지 패딩과 폰트, 아이콘 크기를 함께 낮췄고, 하단 상태바는 다이아몬드 아이콘을 작은 원형 점으로 바꿔 더 단순한 상태선처럼 보이게 정리했습니다.
 - 실행 로그 배너도 본문 침범을 더 줄였습니다. [ChatWindow.xaml.cs](/E:/AX%20Copilot%20-%20Codex/src/AxCopilot/Views/ChatWindow.xaml.cs)의 `AddAgentEventBanner(...)` 에서 debug 전용 `ToolInput` 카드 길이를 더 짧게 줄였고, `FilePath`는 일반 로그에서는 빠른 액션이 붙은 카드형 대신 파일명 한 줄만 약하게 표시하도록 바꿨습니다.
diff --git a/docs/DEVELOPMENT.md b/docs/DEVELOPMENT.md
index 8db1ad3..c5b5b5d 100644
--- a/docs/DEVELOPMENT.md
+++ b/docs/DEVELOPMENT.md
@@ -4604,3 +4604,7 @@ ow + toggle ?쒓컖 ?몄뼱濡??ㅼ떆 ?뺣젹?덈떎.
 - 대화 제목 폰트와 최대 폭, 빠른 스트립 버튼 규격, 프리뷰 토글 크기와 라벨도 더 작게 조정해 상단 보조 정보가 본문보다 덜 튀게 정리했습니다.
 - 검증 예정: `dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\verify\ -p:IntermediateOutputPath=obj\verify\`
 - 업데이트: 2026-04-05 17:45 (KST)
+- 좌측 사이드바도 한 번에 더 `claw-code` 쪽 비율로 줄였습니다. [ChatWindow.xaml](/E:/AX%20Copilot%20-%20Codex/src/AxCopilot/Views/ChatWindow.xaml) 에서 헤더, 새 대화/검색 액션, 검색 편집기, 필터 드롭다운, 탭별 메뉴, 전체 삭제, 하단 사용자/설정 영역까지 패딩·폰트·아이콘·배지 크기를 전반적으로 낮췄습니다.
+- [ChatWindow.xaml.cs](/E:/AX%20Copilot%20-%20Codex/src/AxCopilot/Views/ChatWindow.xaml.cs) 에서는 실제 사이드바 폭을 `270 -> 248`로 줄이고, `AddConversationItem(...)`의 대화 목록 카드 패딩, 코너, 아이콘 열 폭, 제목/날짜/실행 메타 폰트, 편집 버튼 규격, 선택 액센트 바 두께도 함께 축소해 목록 전체가 더 차분한 레이어로 보이게 맞췄습니다.
+- 검증 예정: `dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\verify\ -p:IntermediateOutputPath=obj\verify\`
+- 업데이트: 2026-04-05 17:53 (KST)
diff --git a/src/AxCopilot/Views/ChatWindow.xaml b/src/AxCopilot/Views/ChatWindow.xaml
index d9d14db..8f3f594 100644
--- a/src/AxCopilot/Views/ChatWindow.xaml
+++ b/src/AxCopilot/Views/ChatWindow.xaml
@@ -477,38 +477,38 @@
                     BorderThickness="0,0,1,0">
                 <Grid>
                     <Grid.RowDefinitions>
-                        <RowDefinition Height="44"/>
+                        <RowDefinition Height="40"/>
                         <RowDefinition Height="Auto"/>
                         <RowDefinition Height="Auto"/>
                         <RowDefinition Height="Auto"/>
                         <RowDefinition Height="*"/>
                         <RowDefinition Height="Auto"/>
-                        <RowDefinition Height="50"/>
+                        <RowDefinition Height="46"/>
                     </Grid.RowDefinitions>
 
                     <!-- 헤더 -->
-                    <Grid Grid.Row="0" Margin="12,0">
+                    <Grid Grid.Row="0" Margin="10,0">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
-                            <Border Background="{DynamicResource HintBackground}" CornerRadius="6"
+                            <Border Background="{DynamicResource HintBackground}" CornerRadius="5"
                                     BorderBrush="{DynamicResource BorderColor}"
                                     BorderThickness="1"
-                                    Width="20" Height="20">
-                                <TextBlock Text="&#xE8BD;" FontFamily="Segoe MDL2 Assets" FontSize="10.5"
+                                    Width="18" Height="18">
+                                <TextBlock Text="&#xE8BD;" FontFamily="Segoe MDL2 Assets" FontSize="9.5"
                                            Foreground="{DynamicResource AccentColor}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                             </Border>
-                            <TextBlock Text="AX Agent" FontSize="12.5" FontWeight="SemiBold"
+                            <TextBlock Text="AX Agent" FontSize="11.5" FontWeight="SemiBold"
                                        Foreground="{DynamicResource PrimaryText}"
-                                       VerticalAlignment="Center" Margin="8,0,0,0"/>
+                                       VerticalAlignment="Center" Margin="7,0,0,0"/>
                         </StackPanel>
                     </Grid>
 
                     <!-- 상단 액션 -->
-                    <Grid Grid.Row="1" Margin="12,2,12,6">
+                    <Grid Grid.Row="1" Margin="10,1,10,5">
                         <StackPanel>
                             <Border x:Name="SidebarNewChatTrigger"
                                     Background="Transparent"
-                                    CornerRadius="6"
-                                    Padding="7,5"
+                                    CornerRadius="5"
+                                    Padding="6,4"
                                     Cursor="Hand"
                                     MouseEnter="SidebarNewChatTrigger_MouseEnter"
                                     MouseLeave="SidebarNewChatTrigger_MouseLeave"
@@ -519,25 +519,25 @@
                                         <ColumnDefinition Width="*"/>
                                         <ColumnDefinition Width="Auto"/>
                                     </Grid.ColumnDefinitions>
-                                    <TextBlock Text="&#xE710;" FontFamily="Segoe MDL2 Assets" FontSize="10.5"
+                                    <TextBlock Text="&#xE710;" FontFamily="Segoe MDL2 Assets" FontSize="9.75"
                                                Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center"/>
                                     <TextBlock Grid.Column="1" Text="새 대화"
                                                Foreground="{DynamicResource PrimaryText}"
-                                               FontSize="10.5" Margin="7,0,0,0" VerticalAlignment="Center"/>
+                                               FontSize="10" Margin="6,0,0,0" VerticalAlignment="Center"/>
                                     <TextBlock x:Name="SidebarNewChatShortcutHint"
                                                Grid.Column="2"
                                                Text="Ctrl+N"
                                                Visibility="Collapsed"
                                                Foreground="{DynamicResource SecondaryText}"
-                                               FontSize="10"
+                                               FontSize="9.25"
                                                VerticalAlignment="Center"/>
                                 </Grid>
                             </Border>
 
                             <Border x:Name="SidebarSearchTrigger"
                                     Background="Transparent"
-                                    CornerRadius="6"
-                                    Padding="7,5"
+                                    CornerRadius="5"
+                                    Padding="6,4"
                                     Cursor="Hand"
                                     MouseEnter="SidebarSearchTrigger_MouseEnter"
                                     MouseLeave="SidebarSearchTrigger_MouseLeave"
@@ -548,25 +548,25 @@
                                         <ColumnDefinition Width="*"/>
                                         <ColumnDefinition Width="Auto"/>
                                     </Grid.ColumnDefinitions>
-                                    <TextBlock Text="&#xE721;" FontFamily="Segoe MDL2 Assets" FontSize="10.5"
+                                    <TextBlock Text="&#xE721;" FontFamily="Segoe MDL2 Assets" FontSize="9.75"
                                                Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center"/>
                                     <TextBlock Grid.Column="1" Text="검색"
                                                Foreground="{DynamicResource PrimaryText}"
-                                               FontSize="10.5" Margin="7,0,0,0" VerticalAlignment="Center"/>
+                                               FontSize="10" Margin="6,0,0,0" VerticalAlignment="Center"/>
                                     <TextBlock x:Name="SidebarSearchShortcutHint"
                                                Grid.Column="2"
                                                Text="Ctrl+K"
                                                Visibility="Collapsed"
                                                Foreground="{DynamicResource SecondaryText}"
-                                               FontSize="10"
+                                               FontSize="9.25"
                                                VerticalAlignment="Center"/>
                                 </Grid>
                             </Border>
 
                             <Border x:Name="SidebarSearchEditor"
                                     Background="{DynamicResource ItemBackground}"
-                                    CornerRadius="8"
-                                    Padding="8,5"
+                                    CornerRadius="7"
+                                    Padding="7,4"
                                     Visibility="Collapsed"
                                     Opacity="0"
                                     RenderTransformOrigin="0,0.5">
@@ -581,60 +581,60 @@
                                         <ColumnDefinition Width="Auto"/>
                                         <ColumnDefinition Width="Auto"/>
                                     </Grid.ColumnDefinitions>
-                                    <TextBlock Text="&#xE721;" FontFamily="Segoe MDL2 Assets" FontSize="12"
+                                    <TextBlock Text="&#xE721;" FontFamily="Segoe MDL2 Assets" FontSize="11"
                                                Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center"/>
                                     <TextBox x:Name="SearchBox" Grid.Column="1"
                                              Background="Transparent" BorderThickness="0"
                                              Foreground="{DynamicResource PrimaryText}"
-                                             CaretBrush="{DynamicResource AccentColor}" FontSize="11"
-                                             VerticalAlignment="Center" Margin="10,0,8,0"
+                                             CaretBrush="{DynamicResource AccentColor}" FontSize="10.5"
+                                             VerticalAlignment="Center" Margin="8,0,6,0"
                                              TextChanged="SearchBox_TextChanged"/>
                                     <Button x:Name="BtnConversationSort" Grid.Column="2"
                                             Style="{StaticResource GhostBtn}"
-                                            Padding="8,3" MinWidth="54"
+                                            Padding="6,2.5" MinWidth="50"
                                             Margin="0,0,0,0"
                                             VerticalAlignment="Center"
                                             Click="BtnConversationSort_Click"
                                             ToolTip="대화 정렬 기준 전환"
                                             Visibility="Collapsed">
                                         <StackPanel Orientation="Horizontal">
-                                            <TextBlock Text="&#xE8CB;" FontFamily="Segoe MDL2 Assets" FontSize="11"
+                                            <TextBlock Text="&#xE8CB;" FontFamily="Segoe MDL2 Assets" FontSize="10"
                                                        Foreground="{DynamicResource SecondaryText}"
-                                                       VerticalAlignment="Center" Margin="0,0,5,0"/>
+                                                       VerticalAlignment="Center" Margin="0,0,4,0"/>
                                             <TextBlock x:Name="ConversationSortLabel" Text="활동"
-                                                       FontSize="11" FontWeight="SemiBold"
+                                                       FontSize="10" FontWeight="SemiBold"
                                                        Foreground="{DynamicResource SecondaryText}"
                                                        VerticalAlignment="Center"/>
                                             </StackPanel>
                                     </Button>
                                     <Button x:Name="BtnRunningOnlyFilter" Grid.Column="3"
                                             Style="{StaticResource GhostBtn}"
-                                            Padding="8,3" MinWidth="54"
-                                            Margin="6,0,0,0"
+                                            Padding="6,2.5" MinWidth="50"
+                                            Margin="5,0,0,0"
                                             VerticalAlignment="Center"
                                             Click="BtnRunningOnlyFilter_Click"
                                             ToolTip="비활성"
                                             Visibility="Collapsed"
                                             IsEnabled="False">
                                         <StackPanel Orientation="Horizontal">
-                                            <TextBlock Text="&#xE768;" FontFamily="Segoe MDL2 Assets" FontSize="11"
+                                            <TextBlock Text="&#xE768;" FontFamily="Segoe MDL2 Assets" FontSize="10"
                                                        Foreground="{DynamicResource SecondaryText}"
-                                                       VerticalAlignment="Center" Margin="0,0,5,0"/>
+                                                       VerticalAlignment="Center" Margin="0,0,4,0"/>
                                             <TextBlock x:Name="RunningOnlyFilterLabel" Text="진행"
-                                                       FontSize="11" FontWeight="SemiBold"
+                                                       FontSize="10" FontWeight="SemiBold"
                                                        Foreground="{DynamicResource SecondaryText}"
                                                        VerticalAlignment="Center"/>
                                         </StackPanel>
                                     </Button>
                                     <Button Grid.Column="4"
                                             Style="{StaticResource GhostBtn}"
-                                            Padding="7,4"
-                                            Margin="6,0,0,0"
+                                            Padding="6,3"
+                                            Margin="5,0,0,0"
                                             Click="BtnSidebarSearchClose_Click"
                                             ToolTip="검색 닫기">
                                         <TextBlock Text="&#xE711;"
                                                    FontFamily="Segoe MDL2 Assets"
-                                                   FontSize="10.5"
+                                                   FontSize="9.75"
                                                    Foreground="{DynamicResource SecondaryText}"/>
                                     </Button>
                                 </Grid>
@@ -643,22 +643,22 @@
                     </Grid>
 
                     <!-- 상단 필터 드롭다운 -->
-                    <Border Grid.Row="2" Margin="12,0,12,3">
+                    <Border Grid.Row="2" Margin="10,0,10,3">
                         <Button x:Name="BtnCategoryDrop" Style="{StaticResource GhostBtn}"
-                                HorizontalAlignment="Stretch" Padding="8,4"
+                                HorizontalAlignment="Stretch" Padding="7,3.5"
                                 Click="BtnCategoryDrop_Click">
                             <Grid HorizontalAlignment="Stretch">
                                 <StackPanel Orientation="Horizontal">
                                     <TextBlock x:Name="CategoryIcon" Text="&#xE8BD;"
-                                               FontFamily="Segoe MDL2 Assets" FontSize="11"
+                                               FontFamily="Segoe MDL2 Assets" FontSize="10"
                                                Foreground="{DynamicResource AccentColor}"
-                                               VerticalAlignment="Center" Margin="0,0,8,0"/>
+                                               VerticalAlignment="Center" Margin="0,0,6,0"/>
                                     <TextBlock x:Name="CategoryLabel" Text="모든 주제"
-                                               FontSize="11" FontWeight="SemiBold"
+                                               FontSize="10.25" FontWeight="SemiBold"
                                                Foreground="{DynamicResource PrimaryText}"
                                                VerticalAlignment="Center"/>
                                 </StackPanel>
-                                <TextBlock Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="9"
+                                <TextBlock Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="8.5"
                                            Foreground="{DynamicResource SecondaryText}"
                                            HorizontalAlignment="Right" VerticalAlignment="Center"/>
                             </Grid>
@@ -666,7 +666,7 @@
                     </Border>
 
                     <!-- 탭별 좌측 메뉴 -->
-                    <Border Grid.Row="3" Margin="12,0,12,6"
+                    <Border Grid.Row="3" Margin="10,0,10,5"
                             Background="Transparent"
                             BorderBrush="Transparent"
                             BorderThickness="0"
@@ -675,18 +675,18 @@
                         <StackPanel>
                             <StackPanel Orientation="Horizontal" Margin="0,0,0,4" Visibility="Collapsed">
                                 <TextBlock x:Name="SidebarModeBadgeIcon" Text="&#xE8BD;"
-                                           FontFamily="Segoe MDL2 Assets" FontSize="12"
+                                           FontFamily="Segoe MDL2 Assets" FontSize="10.5"
                                            Foreground="{DynamicResource AccentColor}"
                                            VerticalAlignment="Center" Margin="0,0,6,0"/>
                                 <TextBlock x:Name="SidebarModeBadgeTitle" Text="Chat 메뉴"
-                                           FontSize="11.5" FontWeight="SemiBold"
+                                           FontSize="10.5" FontWeight="SemiBold"
                                            Foreground="{DynamicResource PrimaryText}"
                                            VerticalAlignment="Center"/>
                             </StackPanel>
 
                             <StackPanel x:Name="SidebarChatMenu" Visibility="Visible">
                                 <Border Cursor="Hand" Background="Transparent" CornerRadius="8"
-                                        Padding="8,4" Margin="0,0,0,2"
+                                        Padding="7,3.5" Margin="0,0,0,2"
                                         MouseLeftButtonUp="SidebarChatAll_MouseLeftButtonUp">
                                     <Grid>
                                         <Grid.ColumnDefinitions>
@@ -694,17 +694,17 @@
                                             <ColumnDefinition Width="*"/>
                                             <ColumnDefinition Width="Auto"/>
                                         </Grid.ColumnDefinitions>
-                                        <TextBlock Text="&#xE8BD;" FontFamily="Segoe MDL2 Assets" FontSize="11"
+                                        <TextBlock Text="&#xE8BD;" FontFamily="Segoe MDL2 Assets" FontSize="10"
                                                    Foreground="{DynamicResource AccentColor}" VerticalAlignment="Center"/>
                                         <TextBlock Grid.Column="1" Text="주제"
                                                    Foreground="{DynamicResource PrimaryText}"
-                                                   FontSize="11" Margin="7,0,0,0" VerticalAlignment="Center"/>
-                                        <TextBlock Grid.Column="2" Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="9"
+                                                   FontSize="10.25" Margin="6,0,0,0" VerticalAlignment="Center"/>
+                                        <TextBlock Grid.Column="2" Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="8.5"
                                                    Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center"/>
                                     </Grid>
                                 </Border>
                                 <Border x:Name="SidebarChatRunningRow" Cursor="Hand" Background="Transparent" CornerRadius="8"
-                                        Padding="8,4"
+                                        Padding="7,3.5"
                                         MouseLeftButtonUp="SidebarChatRunning_MouseLeftButtonUp"
                                         Visibility="Collapsed">
                                     <Grid>
@@ -713,21 +713,21 @@
                                             <ColumnDefinition Width="*"/>
                                             <ColumnDefinition Width="Auto"/>
                                         </Grid.ColumnDefinitions>
-                                        <TextBlock Text="&#xE768;" FontFamily="Segoe MDL2 Assets" FontSize="11"
+                                        <TextBlock Text="&#xE768;" FontFamily="Segoe MDL2 Assets" FontSize="10"
                                                    Foreground="#22C55E" VerticalAlignment="Center"/>
                                         <TextBlock Grid.Column="1" Text="진행 중 대화만 보기"
                                                    Foreground="{DynamicResource PrimaryText}"
-                                                   FontSize="11" Margin="7,0,0,0" VerticalAlignment="Center"/>
+                                                   FontSize="10.25" Margin="6,0,0,0" VerticalAlignment="Center"/>
                                         <TextBlock Grid.Column="2" x:Name="SidebarChatRunningState" Text="OFF"
                                                    Foreground="{DynamicResource SecondaryText}"
-                                                   FontSize="10.5" VerticalAlignment="Center"/>
+                                                   FontSize="9.75" VerticalAlignment="Center"/>
                                     </Grid>
                                 </Border>
                             </StackPanel>
 
                             <StackPanel x:Name="SidebarCoworkMenu" Visibility="Collapsed">
                                 <Border Cursor="Hand" Background="Transparent" CornerRadius="8"
-                                        Padding="8,4" Margin="0,0,0,2"
+                                        Padding="7,3.5" Margin="0,0,0,2"
                                         MouseLeftButtonUp="SidebarCoworkCategory_MouseLeftButtonUp">
                                     <Grid>
                                         <Grid.ColumnDefinitions>
@@ -735,12 +735,12 @@
                                             <ColumnDefinition Width="*"/>
                                             <ColumnDefinition Width="Auto"/>
                                         </Grid.ColumnDefinitions>
-                                        <TextBlock Text="&#xE8FD;" FontFamily="Segoe MDL2 Assets" FontSize="11"
+                                        <TextBlock Text="&#xE8FD;" FontFamily="Segoe MDL2 Assets" FontSize="10"
                                                    Foreground="#3B82F6" VerticalAlignment="Center"/>
                                         <TextBlock Grid.Column="1" Text="작업 유형"
                                                    Foreground="{DynamicResource PrimaryText}"
-                                                   FontSize="11" Margin="7,0,0,0" VerticalAlignment="Center"/>
-                                        <TextBlock Grid.Column="2" Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="9"
+                                                   FontSize="10.25" Margin="6,0,0,0" VerticalAlignment="Center"/>
+                                        <TextBlock Grid.Column="2" Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="8.5"
                                                    Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center"/>
                                     </Grid>
                                 </Border>
@@ -748,7 +748,7 @@
 
                             <StackPanel x:Name="SidebarCodeMenu" Visibility="Collapsed">
                                 <Border Cursor="Hand" Background="Transparent" CornerRadius="8"
-                                        Padding="8,4" Margin="0,0,0,2"
+                                        Padding="7,3.5" Margin="0,0,0,2"
                                         MouseLeftButtonUp="SidebarCodeCategory_MouseLeftButtonUp">
                                     <Grid>
                                         <Grid.ColumnDefinitions>
@@ -756,12 +756,12 @@
                                             <ColumnDefinition Width="*"/>
                                             <ColumnDefinition Width="Auto"/>
                                         </Grid.ColumnDefinitions>
-                                        <TextBlock Text="&#xE943;" FontFamily="Segoe MDL2 Assets" FontSize="11"
+                                        <TextBlock Text="&#xE943;" FontFamily="Segoe MDL2 Assets" FontSize="10"
                                                    Foreground="#3B82F6" VerticalAlignment="Center"/>
                                         <TextBlock Grid.Column="1" Text="워크스페이스"
                                                    Foreground="{DynamicResource PrimaryText}"
-                                                   FontSize="11" Margin="7,0,0,0" VerticalAlignment="Center"/>
-                                        <TextBlock Grid.Column="2" Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="9"
+                                                   FontSize="10.25" Margin="6,0,0,0" VerticalAlignment="Center"/>
+                                        <TextBlock Grid.Column="2" Text="&#xE70D;" FontFamily="Segoe MDL2 Assets" FontSize="8.5"
                                                    Foreground="{DynamicResource SecondaryText}" VerticalAlignment="Center"/>
                                     </Grid>
                                 </Border>
@@ -772,51 +772,51 @@
                     <!-- 대화 목록 -->
                     <ScrollViewer Grid.Row="4" VerticalScrollBarVisibility="Auto"
                                   HorizontalScrollBarVisibility="Disabled">
-                        <StackPanel x:Name="ConversationPanel" Margin="8,0,8,0"/>
+                        <StackPanel x:Name="ConversationPanel" Margin="6,0,6,0"/>
                     </ScrollViewer>
 
                     <!-- 하단: 삭제 -->
                     <Border Grid.Row="5" BorderBrush="{DynamicResource SeparatorColor}" BorderThickness="0,1,0,0"
-                            Padding="0,3">
+                            Padding="0,2">
                         <Button x:Name="BtnDeleteAll" Style="{StaticResource GhostBtn}"
                                 HorizontalAlignment="Center" VerticalAlignment="Center"
                                 Click="BtnDeleteAll_Click">
                             <StackPanel Orientation="Horizontal">
-                                <TextBlock Text="&#xE74D;" FontFamily="Segoe MDL2 Assets" FontSize="10.5"
-                                           Foreground="#AA5555" VerticalAlignment="Center" Margin="0,0,5,0"/>
-                                <TextBlock Text="전체 삭제" FontSize="10.5" Foreground="#AA5555"/>
+                                <TextBlock Text="&#xE74D;" FontFamily="Segoe MDL2 Assets" FontSize="9.75"
+                                           Foreground="#AA5555" VerticalAlignment="Center" Margin="0,0,4,0"/>
+                                <TextBlock Text="전체 삭제" FontSize="9.75" Foreground="#AA5555"/>
                             </StackPanel>
                         </Button>
                     </Border>
 
                     <!-- 하단: 사용자 계정 -->
-                    <Border Grid.Row="6" Margin="12,0,12,8">
+                    <Border Grid.Row="6" Margin="10,0,10,6">
                         <Grid>
                             <Grid.ColumnDefinitions>
                                 <ColumnDefinition Width="Auto"/>
                                 <ColumnDefinition Width="*"/>
                                 <ColumnDefinition Width="Auto"/>
                             </Grid.ColumnDefinitions>
-                            <Border Grid.Column="0" Width="32" Height="32" CornerRadius="16"
+                            <Border Grid.Column="0" Width="28" Height="28" CornerRadius="14"
                                     Background="{DynamicResource HintBackground}"
                                     BorderBrush="{DynamicResource BorderColor}"
                                     BorderThickness="1"
-                                    Margin="0,0,10,0">
-                                <TextBlock x:Name="UserInitialSidebar" Text="U" FontSize="13" FontWeight="SemiBold"
+                                    Margin="0,0,8,0">
+                                <TextBlock x:Name="UserInitialSidebar" Text="U" FontSize="11.5" FontWeight="SemiBold"
                                            Foreground="{DynamicResource PrimaryText}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                             </Border>
                             <StackPanel Grid.Column="1" VerticalAlignment="Center">
-                                <TextBlock x:Name="UserNameText" Text="" FontSize="11.5" FontWeight="SemiBold"
+                                <TextBlock x:Name="UserNameText" Text="" FontSize="10.5" FontWeight="SemiBold"
                                            Foreground="{DynamicResource PrimaryText}"
                                            TextTrimming="CharacterEllipsis"/>
-                                <TextBlock x:Name="UserPcText" Text="" FontSize="9.5"
+                                <TextBlock x:Name="UserPcText" Text="" FontSize="8.75"
                                            Foreground="{DynamicResource SecondaryText}"/>
                             </StackPanel>
                             <Button x:Name="BtnSidebarSettings"
                                     Grid.Column="2"
                                     Style="{StaticResource GhostBtn}"
-                                    Width="28" Height="28"
-                                    Margin="8,0,0,0"
+                                    Width="24" Height="24"
+                                    Margin="6,0,0,0"
                                     VerticalAlignment="Center"
                                     Click="BtnSettings_Click"
                                     ToolTip="AX Agent 설정">
diff --git a/src/AxCopilot/Views/ChatWindow.xaml.cs b/src/AxCopilot/Views/ChatWindow.xaml.cs
index 352bacb..d6ace33 100644
--- a/src/AxCopilot/Views/ChatWindow.xaml.cs
+++ b/src/AxCopilot/Views/ChatWindow.xaml.cs
@@ -2879,12 +2879,12 @@ public partial class ChatWindow : Window
 
             if (animated)
             {
-                AnimateSidebar(0, 270, () => SidebarColumn.MinWidth = 200);
+                AnimateSidebar(0, 248, () => SidebarColumn.MinWidth = 184);
             }
             else
             {
-                SidebarColumn.MinWidth = 200;
-                SidebarColumn.Width = new GridLength(270);
+                SidebarColumn.MinWidth = 184;
+                SidebarColumn.Width = new GridLength(248);
             }
             return;
         }
@@ -2892,7 +2892,7 @@ public partial class ChatWindow : Window
         SidebarColumn.MinWidth = 0;
         if (animated)
         {
-            AnimateSidebar(270, 0, () =>
+            AnimateSidebar(248, 0, () =>
             {
                 SidebarPanel.Visibility = Visibility.Collapsed;
                 IconBarColumn.Width = new GridLength(52);
@@ -3229,14 +3229,14 @@ public partial class ChatWindow : Window
             Background = isSelected
                 ? new SolidColorBrush(Color.FromArgb(0x10, 0x4B, 0x5E, 0xFC))
                 : Brushes.Transparent,
-            CornerRadius = new CornerRadius(6),
-            Padding = new Thickness(7, 4, 7, 4),
-            Margin = isBranch ? new Thickness(12, 1, 0, 1) : new Thickness(0, 1, 0, 1),
+            CornerRadius = new CornerRadius(5),
+            Padding = new Thickness(6, 3.5, 6, 3.5),
+            Margin = isBranch ? new Thickness(10, 1, 0, 1) : new Thickness(0, 1, 0, 1),
             Cursor = Cursors.Hand
         };
 
         var grid = new Grid();
-        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(18) });
+        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(16) });
         grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
         grid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
 
@@ -3255,7 +3255,7 @@ public partial class ChatWindow : Window
         {
             Text = iconText,
             FontFamily = new FontFamily("Segoe MDL2 Assets"),
-            FontSize = 10,
+            FontSize = 9.25,
             Foreground = iconBrush,
             VerticalAlignment = VerticalAlignment.Center
         };
@@ -3270,7 +3270,7 @@ public partial class ChatWindow : Window
         var title = new TextBlock
         {
             Text = item.Title,
-            FontSize = 10.5,
+            FontSize = 10,
             FontWeight = isSelected ? FontWeights.SemiBold : FontWeights.Normal,
             Foreground = titleColor,
             TextTrimming = TextTrimming.CharacterEllipsis
@@ -3278,7 +3278,7 @@ public partial class ChatWindow : Window
         var date = new TextBlock
         {
             Text = item.UpdatedAtText,
-            FontSize = 8,
+            FontSize = 7.6,
             Foreground = dateColor,
             Margin = new Thickness(0, 1, 0, 0)
         };
@@ -3291,10 +3291,10 @@ public partial class ChatWindow : Window
                 Text = _appState.ActiveTasks.Count > 0
                     ? $"진행 중 {_appState.ActiveTasks.Count}"
                     : "진행 중",
-                FontSize = 7.75,
+                FontSize = 7.4,
                 FontWeight = FontWeights.Medium,
                 Foreground = BrushFromHex("#4F46E5"),
-                Margin = new Thickness(0, 1.5, 0, 0),
+                Margin = new Thickness(0, 1, 0, 0),
             });
         }
         if (item.AgentRunCount > 0)
@@ -3304,11 +3304,11 @@ public partial class ChatWindow : Window
                 Text = item.FailedAgentRunCount > 0
                     ? $"실패 {item.FailedAgentRunCount} · {TruncateForStatus(item.LastAgentRunSummary, 26)}"
                     : $"실행 {item.AgentRunCount} · {TruncateForStatus(item.LastAgentRunSummary, 28)}",
-                FontSize = 7.9,
+                FontSize = 7.45,
                 Foreground = item.FailedAgentRunCount > 0
                     ? BrushFromHex("#B91C1C")
                     : (TryFindResource("SecondaryText") as Brush ?? Brushes.Gray),
-                Margin = new Thickness(0, 1.5, 0, 0),
+                Margin = new Thickness(0, 1, 0, 0),
                 TextTrimming = TextTrimming.CharacterEllipsis
             };
             if (!string.IsNullOrWhiteSpace(item.LastAgentRunSummary))
@@ -3329,7 +3329,7 @@ public partial class ChatWindow : Window
             {
                 Text = "\uE70F", // Edit
                 FontFamily = new FontFamily("Segoe MDL2 Assets"),
-                FontSize = 8,
+                FontSize = 7.6,
                 Foreground = (TryFindResource("SecondaryText") as Brush ?? Brushes.Gray)
             },
             Background = Brushes.Transparent,
@@ -3337,8 +3337,8 @@ public partial class ChatWindow : Window
             Cursor = Cursors.Hand,
             VerticalAlignment = VerticalAlignment.Center,
             Visibility = Visibility.Collapsed,
-            Width = 20,
-            Height = 20,
+            Width = 18,
+            Height = 18,
             Padding = new Thickness(0),
             Opacity = 0.72,
             ToolTip = _activeTab == "Cowork" ? "작업 유형" : "대화 주제 변경"
@@ -3352,7 +3352,7 @@ public partial class ChatWindow : Window
         if (isSelected)
         {
             border.BorderBrush = TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue;
-            border.BorderThickness = new Thickness(1.5, 0, 0, 0);
+            border.BorderThickness = new Thickness(1.25, 0, 0, 0);
         }
 
         border.Child = grid;