diff --git a/app/core/theme.py b/app/core/theme.py
index f2ebf64..69f0df6 100644
--- a/app/core/theme.py
+++ b/app/core/theme.py
@@ -1,10 +1,16 @@
-from PySide6.QtCore import QSettings
+from PySide6.QtCore import QSettings, Signal, QObject
+
+class ThemeManager(QObject):
+    theme_changed = Signal(str)
 
-class ThemeManager:
     def __init__(self):
+        super().__init__()
         self.settings = QSettings("yobble_messenger", "Theme")
         self.theme = self.settings.value("theme", "dark")
 
+    def get_theme(self):
+        return self.theme
+
     def is_dark(self):
         return self.theme == "dark"
 
@@ -12,6 +18,7 @@ class ThemeManager:
         if theme in ("dark", "light"):
             self.theme = theme
             self.settings.setValue("theme", theme)
+            self.theme_changed.emit(self.theme)
 
 # Глобальный экземпляр
 theme_manager = ThemeManager()
diff --git a/app/ui/views/login_view.py b/app/ui/views/login_view.py
index f4b638b..e21c237 100644
--- a/app/ui/views/login_view.py
+++ b/app/ui/views/login_view.py
@@ -55,9 +55,9 @@ class LoginView(QWidget):
         self.on_login = on_login
         self.is_dark_theme = theme_manager.is_dark()
         print("self.is_dark_theme", self.is_dark_theme)
-        self.setWindowTitle(config.APP_HEADER)
-        # self.setFixedSize(400, 650)
-        self.setMinimumSize(400, 650)
+        # self.setWindowTitle(config.APP_HEADER)
+        # # self.setFixedSize(400, 650)
+        # self.setMinimumSize(400, 650)
 
         self.lang_combo = None
         self.is_registration = False
@@ -166,9 +166,21 @@ class LoginView(QWidget):
 
         self.reg_password_input.textChanged.connect(self.confirm_password_input.on_text_changed)
 
+    def _update_window_title(self):
+        window = self.window()
+        if not window:
+            return
+
+        if self.is_registration:
+            title = f"{localizer.translate('Регистрация')} | {config.APP_HEADER}"
+        else:
+            title = f"{localizer.translate('Авторизация')} | {config.APP_HEADER}"
+        window.setWindowTitle(title)
+
     def render_form(self):
         self.clear_form()
         self.clear_main_layout()
+        self._update_window_title()
 
         if self.is_registration:
             self.title.setText(localizer.translate("Регистрация"))
@@ -353,3 +365,4 @@ class LoginView(QWidget):
     def update_ui_language(self):
         self.theme_button.setText("🌞" if not self.is_dark_theme else "🌙")
         self.render_form()
+        self._update_window_title()
diff --git a/main.py b/main.py
index 92cf49b..785f5d6 100644
--- a/main.py
+++ b/main.py
@@ -1,26 +1,36 @@
-from PySide6.QtWidgets import QApplication
+from PySide6.QtWidgets import QApplication, QMainWindow
 from PySide6.QtGui import QIcon
 from app.controllers.main_controller import MainController
+from app.core.theme import theme_manager
+import app.core.config as config
 import sys
-import ctypes
 
-def is_admin():
-    """Проверяет, запущена ли программа с правами администратора"""
-    try:
-        return ctypes.windll.shell32.IsUserAnAdmin()
-    except:
-        return False
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+        self.setWindowTitle(config.APP_HEADER)
+        self.setMinimumSize(400, 650)
+        
+        self.controller = MainController()
+        self.setCentralWidget(self.controller)
+        
+        theme_manager.theme_changed.connect(self.apply_theme)
+        self.apply_theme(theme_manager.get_theme())
+
+    def apply_theme(self, theme):
+        if theme == "dark":
+            self.setStyleSheet("background-color: #2e2e2e;")
+        else:
+            self.setStyleSheet("background-color: #f0f0f0;")
 
 def main():
     app = QApplication(sys.argv)
     app.setWindowIcon(QIcon("app/icons/logo3.png"))
-    controller = MainController()
-    controller.show()
+    
+    window = MainWindow()
+    window.show()
+    
     sys.exit(app.exec())
 
 if __name__ == "__main__":
-    # if not is_admin():
-    #     # Попытка перезапуска с правами администратора
-    #     ctypes.windll.shell32.ShellExecuteW(None, "runas", sys.executable, " ".join(sys.argv), None, 1)
-    #     sys.exit()
-    main()
+    main()
\ No newline at end of file