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src/AxCopilot/Themes/Nord.xaml

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+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <!--
+        Nord 테마 — Arctic, north-bluish color palette
+        출처: https://www.nordtheme.com
+        Polar Night (배경) + Snow Storm (텍스트) + Frost (액센트) + Aurora (하이라이트)
+    -->
+
+    <!-- Polar Night -->
+    <SolidColorBrush x:Key="LauncherBackground"     Color="#2E3440"/>
+    <SolidColorBrush x:Key="ItemBackground"         Color="#3B4252"/>
+    <SolidColorBrush x:Key="ItemSelectedBackground"      Color="#5E81AC"/>  <!-- Nord 10 Frost -->
+    <SolidColorBrush x:Key="ItemSelectedHoverBackground" Color="#7294BE"/>
+    <SolidColorBrush x:Key="ItemHoverBackground"         Color="#383E4A"/>
+
+    <!-- Snow Storm + Frost -->
+    <SolidColorBrush x:Key="PrimaryText"            Color="#ECEFF4"/>  <!-- Nord 6 -->
+    <SolidColorBrush x:Key="SecondaryText"          Color="#ACBACA"/>
+    <SolidColorBrush x:Key="PlaceholderText"        Color="#96A4BC"/>  <!-- Nord 3 brightened -->
+
+    <!-- Frost -->
+    <SolidColorBrush x:Key="AccentColor"            Color="#88C0D0"/>  <!-- Nord 8 -->
+
+    <SolidColorBrush x:Key="SeparatorColor"         Color="#3B4252"/>
+    <SolidColorBrush x:Key="HintBackground"         Color="#3B4252"/>
+    <SolidColorBrush x:Key="HintText"               Color="#7E8898"/>
+
+    <SolidColorBrush x:Key="BorderColor"            Color="#434C5E"/>  <!-- Nord 2 -->
+    <SolidColorBrush x:Key="ScrollbarThumb"         Color="#4C566A"/>  <!-- Nord 3 -->
+
+    <Color x:Key="ShadowColor">#000000</Color>
+
+    <!-- 모양 (Shape) — Nord: 북유럽 미니멀리즘, 적당히 둥글게 -->
+    <CornerRadius x:Key="WindowCornerRadius">16</CornerRadius>
+    <CornerRadius x:Key="ItemCornerRadius">8</CornerRadius>
+
+</ResourceDictionary>