diff --git a/KeyBorad/KeyBorad/APP/AppTheme.cpp b/KeyBorad/KeyBorad/APP/AppTheme.cpp
index 97de382..2b35d1f 100644
--- a/KeyBorad/KeyBorad/APP/AppTheme.cpp
+++ b/KeyBorad/KeyBorad/APP/AppTheme.cpp
@@ -1,6 +1,86 @@
 #include "APP/AppTheme.h"
 
-App_Theme App_Theme_Default()
+namespace APP
 {
-    return App_Theme();
+
+namespace
+{
+
+QString App_Func_RgbText(const QColor& Color)
+{
+    return QStringLiteral("rgb(%1, %2, %3)")
+        .arg(Color.red())
+        .arg(Color.green())
+        .arg(Color.blue());
 }
+
+} // namespace
+
+App_ThemePalette App_Theme_DefaultPalette()
+{
+    return App_ThemePalette();
+}
+
+QString App_Theme_BuildWindowStyleSheet()
+{
+    const App_ThemePalette Palette = App_Theme_DefaultPalette();
+
+    return QStringLiteral(
+        "QWidget {"
+        " background:%1;"
+        " color:%2;"
+        "}"
+        "QTabWidget::pane {"
+        " border:1px solid %3;"
+        " border-radius:12px;"
+        " background:%4;"
+        "}"
+        "QTabBar::tab {"
+        " background:%4;"
+        " color:%5;"
+        " padding:10px 16px;"
+        " margin-right:6px;"
+        " border:1px solid %3;"
+        " border-bottom:none;"
+        " border-top-left-radius:10px;"
+        " border-top-right-radius:10px;"
+        "}"
+        "QTabBar::tab:selected {"
+        " color:%2;"
+        " background:%1;"
+        "}"
+    )
+        .arg(App_Func_RgbText(Palette.Window))
+        .arg(App_Func_RgbText(Palette.TextPrimary))
+        .arg(App_Func_RgbText(Palette.Border))
+        .arg(App_Func_RgbText(Palette.Surface))
+        .arg(App_Func_RgbText(Palette.TextMuted));
+}
+
+QString App_Theme_BuildCardStyleSheet()
+{
+    const App_ThemePalette Palette = App_Theme_DefaultPalette();
+
+    return QStringLiteral(
+        "QFrame {"
+        " background:%1;"
+        " border:1px solid %2;"
+        " border-radius:14px;"
+        "}"
+        "QLabel[role=\"title\"] {"
+        " color:%3;"
+        " font-size:20px;"
+        " font-weight:600;"
+        "}"
+        "QLabel[role=\"body\"] {"
+        " color:%4;"
+        " font-size:13px;"
+        "}"
+    )
+        .arg(App_Func_RgbText(Palette.Surface))
+        .arg(App_Func_RgbText(Palette.Border))
+        .arg(App_Func_RgbText(Palette.TextPrimary))
+        .arg(App_Func_RgbText(Palette.TextMuted));
+}
+
+} // namespace APP
diff --git a/KeyBorad/KeyBorad/APP/AppTheme.h b/KeyBorad/KeyBorad/APP/AppTheme.h
index f2c6c8f..21f8684 100644
--- a/KeyBorad/KeyBorad/APP/AppTheme.h
+++ b/KeyBorad/KeyBorad/APP/AppTheme.h
@@ -1,14 +1,24 @@
 #pragma once
 
-#include <QtCore/QtGlobal>
+#include <QtCore/QString>
+#include <QtGui/QColor>
 
-struct App_Theme
+namespace APP
 {
-    quint32 AccentRgb = 0x4CC9F0;
-    quint32 BackgroundRgb = 0x0F172A;
-    quint32 SurfaceRgb = 0x111827;
-    quint32 BorderRgb = 0x334155;
-    quint32 TextRgb = 0xE2E8F0;
+
+struct App_ThemePalette
+{
+    QColor Window = QColor(15, 23, 42);
+    QColor Surface = QColor(17, 24, 39);
+    QColor Border = QColor(51, 65, 85);
+    QColor TextPrimary = QColor(226, 232, 240);
+    QColor TextMuted = QColor(148, 163, 184);
+    QColor Accent = QColor(76, 201, 240);
+    QColor AccentSoft = QColor(34, 197, 94);
 };
 
-App_Theme App_Theme_Default();
+App_ThemePalette App_Theme_DefaultPalette();
+QString App_Theme_BuildWindowStyleSheet();
+QString App_Theme_BuildCardStyleSheet();
+
+} // namespace APP