diff --git a/src/SheetMe.Designer/Views/QueryEditorWindow.xaml b/src/SheetMe.Designer/Views/QueryEditorWindow.xaml
index 0dcba1e..37bfd8e 100644
--- a/src/SheetMe.Designer/Views/QueryEditorWindow.xaml
+++ b/src/SheetMe.Designer/Views/QueryEditorWindow.xaml
@@ -64,35 +64,39 @@
             <Setter Property="AutoGenerateColumns" Value="True"/>
             <Setter Property="IsReadOnly" Value="True"/>
             <Setter Property="HeadersVisibility" Value="Column"/>
-            <Setter Property="GridLinesVisibility" Value="All"/>
+            <!-- 목업의 표: 바깥 테두리는 감싸는 상자가 이미 그리므로 표 자체는 그리지 않는다.
+                 줄은 가로만 — 세로선까지 그으면 컬럼이 52개인 조회에서 화면이 격자로 가득 찬다. -->
+            <Setter Property="GridLinesVisibility" Value="Horizontal"/>
             <Setter Property="FontSize" Value="13"/>
-            <Setter Property="RowHeight" Value="40"/>
+            <Setter Property="RowHeight" Value="38"/>
+            <Setter Property="ColumnHeaderHeight" Value="38"/>
             <Setter Property="Background" Value="{DynamicResource B.Surface}"/>
-            <Setter Property="BorderBrush" Value="{DynamicResource B.InputBorder}"/>
-            <Setter Property="BorderThickness" Value="1"/>
+            <Setter Property="RowBackground" Value="{DynamicResource B.Surface}"/>
+            <Setter Property="BorderThickness" Value="0"/>
             <Setter Property="HorizontalGridLinesBrush" Value="{DynamicResource B.Line}"/>
-            <Setter Property="VerticalGridLinesBrush" Value="{DynamicResource B.Line}"/>
             <Setter Property="ColumnHeaderStyle">
                 <Setter.Value>
                     <Style TargetType="DataGridColumnHeader">
-                        <Setter Property="Background" Value="{DynamicResource B.Input}"/>
+                        <Setter Property="Background" Value="{DynamicResource B.Chip}"/>
                         <Setter Property="Foreground" Value="{DynamicResource B.Ink}"/>
                         <Setter Property="FontWeight" Value="SemiBold"/>
-                        <Setter Property="FontSize" Value="13"/>
-                        <Setter Property="Padding" Value="10,7"/>
-                        <Setter Property="BorderBrush" Value="{DynamicResource B.InputBorder}"/>
+                        <Setter Property="FontSize" Value="12.5"/>
+                        <Setter Property="Padding" Value="12,0"/>
+                        <Setter Property="BorderBrush" Value="{DynamicResource B.Line2}"/>
                         <Setter Property="BorderThickness" Value="0,0,1,1"/>
                         <Setter Property="HorizontalContentAlignment" Value="Left"/>
+                        <Setter Property="VerticalContentAlignment" Value="Center"/>
                     </Style>
                 </Setter.Value>
             </Setter>
             <Setter Property="CellStyle">
                 <Setter.Value>
                     <Style TargetType="DataGridCell">
-                        <Setter Property="Padding" Value="10,0"/>
+                        <Setter Property="Padding" Value="12,0"/>
                         <Setter Property="BorderThickness" Value="0"/>
                         <Setter Property="VerticalContentAlignment" Value="Center"/>
                         <Setter Property="Foreground" Value="{DynamicResource B.Ink}"/>
+                        <Setter Property="Background" Value="Transparent"/>
                     </Style>
                 </Setter.Value>
             </Setter>
@@ -228,23 +232,28 @@
                                     <TextBlock x:Name="TrialSummary" FontSize="12.5" TextWrapping="Wrap"
                                                VerticalAlignment="Center"/>
                                 </DockPanel>
-                                <DataGrid x:Name="TrialGrid" Style="{StaticResource ResultGrid}" MaxHeight="200"
-                                          AutomationProperties.Name="검증 결과 표본"/>
+                                <!-- 표를 감싸는 테두리 — 표 자체는 테두리를 그리지 않는다(위 스타일) -->
+                                <Border BorderThickness="1" BorderBrush="{DynamicResource B.Line2}">
+                                    <DataGrid x:Name="TrialGrid" Style="{StaticResource ResultGrid}" MaxHeight="200"
+                                              AutomationProperties.Name="검증 결과 표본"/>
+                                </Border>
                             </DockPanel>
                         </DockPanel>
                     </Border>
 
                     <!-- 편집 영역: 색칠 레이어 + 투명 TextBox -->
-                    <Border BorderThickness="1" CornerRadius="8" ClipToBounds="True"
+                    <!-- 모서리를 둥글리지 않는다. 둥글리면 클리핑 때문에 줄번호 칸의 회색 면과
+                         본문 사이 구분선까지 함께 휘어 보인다. -->
+                    <Border BorderThickness="1" CornerRadius="0"
                             BorderBrush="{DynamicResource B.InputBorder}" Background="{DynamicResource B.Input}">
                         <Grid>
                             <Grid.ColumnDefinitions>
                                 <ColumnDefinition Width="Auto"/>
                                 <ColumnDefinition Width="*"/>
                             </Grid.ColumnDefinitions>
-                            <!-- 줄 번호 — 본문과 세로선으로 가른다(목업의 구분선) -->
-                            <Border Grid.Column="0" Background="{DynamicResource B.Surface}" Padding="16,14,12,14"
-                                    BorderThickness="0,0,1,0" BorderBrush="{DynamicResource B.Line}">
+                            <!-- 줄 번호 홈통 — 회색 면 + 곧은 세로 구분선 -->
+                            <Border Grid.Column="0" Background="{DynamicResource B.Chip}" Padding="16,14,12,14"
+                                    BorderThickness="0,0,1,0" BorderBrush="{DynamicResource B.Line2}">
                                 <TextBlock x:Name="LineNumbers" FontFamily="D2Coding, 굴림체, Consolas" FontSize="14.5"
                                            Foreground="{DynamicResource B.Muted}" TextAlignment="Right" MinWidth="20"/>
                             </Border>