Identify all errors and logic errors in this python code, for each of the errors, write the complete fixed code for that part. "from PySide6.QtWidgets import (
    QApplication, QMainWindow, QWidget, QVBoxLayout, QTabWidget, QHBoxLayout,
    QToolBar, QMenu, QToolButton, QListWidget, QFileDialog, QTableView,
    QSplitter, QLineEdit, QLabel, QComboBox, QMessageBox, QListWidgetItem,
    QPushButton, QInputDialog
)
from PySide6.QtGui import QIcon, QFont
from PySide6.QtCore import Qt, QSize, QAbstractTableModel, Signal, QModelIndex
import sys
import pandas as pd
import numpy as np


class PandasModel(QAbstractTableModel):
    """
    Model to display Pandas DataFrame in a QTableView.
    """
    column_dtype_changed = Signal(int, str)

    def __init__(self, data):
        super().__init__()
        self._data = data

    def rowCount(self, parent=None):
        return self._data.shape[0]

    def columnCount(self, parent=None):
        return self._data.shape[1]

    def data(self, index, role=Qt.DisplayRole):
        if index.isValid() and role == Qt.DisplayRole:
            return str(self._data.iloc[index.row(), index.column()])
        return None

    def setData(self, index, value, role=Qt.EditRole):
        if index.isValid() and role == Qt.EditRole:
            column_dtype = self._data.dtypes[index.column()]
            try:
                if pd.api.types.is_integer_dtype(column_dtype):
                    cast_value = int(value)
                elif pd.api.types.is_float_dtype(column_dtype):
                    cast_value = float(value)
                elif pd.api.types.is_datetime64_any_dtype(column_dtype):
                    cast_value = pd.to_datetime(value)
                else:
                    cast_value = str(value)
                self._data.iloc[index.row(), index.column()] = cast_value
                self.dataChanged.emit(index, index, [Qt.DisplayRole])
                return True
            except ValueError:
                self._handle_error("Invalid data type entered.")
                return False
        return False

    def flags(self, index):
        return Qt.ItemIsEditable | Qt.ItemIsEnabled | Qt.ItemIsSelectable

    def headerData(self, col, orientation, role):
        if orientation == Qt.Horizontal and role == Qt.DisplayRole:
            return self._data.columns[col]
        return None

    def update_column_dtype(self, column_index, new_dtype):
        try:
            column_name = self._data.columns[column_index]
            if new_dtype == "datetime":
                self._data[column_name] = pd.to_datetime(self._data[column_name], errors='coerce')
            elif new_dtype == "float":
                self._data[column_name] = pd.to_numeric(self._data[column_name], errors='coerce').astype(float)
            elif new_dtype == "int":
                self._data[column_name] = pd.to_numeric(self._data[column_name], errors='coerce').astype(int)
            elif new_dtype == "str":
                self._data[column_name] = self._data[column_name].astype(str)
            self.layoutChanged.emit()
            self.column_dtype_changed.emit(column_index, new_dtype)
        except Exception as e:
            self._handle_error(f"Error converting type: {e}")

    def _handle_error(self, message):
        print(message)
        QMessageBox.critical(None, "Error", message)


class VariableViewer(QWidget):
    variable_changed = Signal(int, str, str)
    variable_added = Signal()
    variable_deleted = Signal(int)
    row_added = Signal()
    row_deleted = Signal()

    def __init__(self):
        super().__init__()
        self.layout = QVBoxLayout(self)
        self.variable_list = QListWidget()
        self.layout.addWidget(self.variable_list)

        self._add_buttons()
        self._add_row_buttons()

    def _add_buttons(self):
        button_layout = QHBoxLayout()
        self.add_variable_button = QPushButton("Add Variable")
        self.add_variable_button.clicked.connect(self.variable_added.emit)
        self.delete_variable_button = QPushButton("Delete Variable")
        self.delete_variable_button.clicked.connect(self._on_delete_variable)
        button_layout.addWidget(self.add_variable_button)
        button_layout.addWidget(self.delete_variable_button)
        self.layout.addLayout(button_layout)

    def _add_row_buttons(self):
        row_button_layout = QHBoxLayout()
        self.add_row_button = QPushButton("Add Row")
        self.add_row_button.clicked.connect(self.row_added.emit)
        self.delete_row_button = QPushButton("Delete Row")
        self.delete_row_button.clicked.connect(self.row_deleted.emit)
        row_button_layout.addWidget(self.add_row_button)
        row_button_layout.addWidget(self.delete_row_button)
        self.layout.addLayout(row_button_layout)

    def populate_variables(self, column_names, data_types):
        self.variable_list.clear()
        for i, col in enumerate(column_names):
            item = QListWidgetItem()
            widget = self._create_variable_widget(i, col, data_types[col])
            item.setSizeHint(widget.sizeHint())
            self.variable_list.addItem(item)
            self.variable_list.setItemWidget(item, widget)

    def _create_variable_widget(self, index, name, dtype):
        widget = QWidget()
        layout = QHBoxLayout(widget)

        name_edit = QLineEdit(name)
        name_edit.editingFinished.connect(lambda: self.variable_changed.emit(index, "name", name_edit.text()))

        type_combo = QComboBox()
        type_combo.addItems(["datetime", "float", "int", "str"])
        type_combo.setCurrentText(self._convert_dtype_to_str(dtype))
        type_combo.currentTextChanged.connect(lambda text: self.variable_changed.emit(index, "type", text))

        layout.addWidget(name_edit)
        layout.addWidget(type_combo)
        return widget

    def _convert_dtype_to_str(self, dtype):
        dtype_str = str(dtype)
        if dtype_str.startswith("datetime"):
            return "datetime"
        elif dtype_str.startswith("float"):
            return "float"
        elif dtype_str.startswith("int"):
            return "int"
        elif dtype_str.startswith("object"):
            return "str"
        return dtype_str

    def _on_delete_variable(self):
        selected_items = self.variable_list.selectedItems()
        if selected_items:
            indices_to_delete = [self.variable_list.row(item) for item in selected_items]
            for index in sorted(indices_to_delete, reverse=True):
                self.variable_deleted.emit(index)
        else:
            QMessageBox.warning(self, "No Selection", "Please select one or more variables to delete.")

    def update_dtype_in_viewer(self, column_index, new_dtype):
        item = self.variable_list.item(column_index)
        widget = self.variable_list.itemWidget(item)
        if widget:
            type_combo = widget.findChild(QComboBox)
            if type_combo:
                type_combo.setCurrentText(new_dtype)


class Command:
    def execute(self):
        raise NotImplementedError("Subclasses must implement execute method")

    def undo(self):
        raise NotImplementedError("Subclasses must implement undo method")


class AddRowCommand(Command):
    def __init__(self, df, model):
        self.df = df
        self.model = model
        self.new_row_index = None

    def execute(self):
        new_row = pd.Series([np.nan] * len(self.df.columns), index=self.df.columns)
        self.df.loc[self.df.shape[0]] = new_row
        self.model.beginInsertRows(QModelIndex(), self.df.shape[0] - 1, self.df.shape[0] - 1)
        self.model.endInsertRows()
        self.model.column_dtype_changed.emit(len(self.df.columns) - 1, "float")  # Example signal

    def undo(self):
        self.model.beginRemoveRows(QModelIndex(), self.df.shape[0] - 1, self.df.shape[0] - 1)
        self.df.drop(self.df.shape[0] - 1, inplace=True)
        self.model.endRemoveRows()
        self.model._data = self.df


class DeleteRowCommand(Command):
    def __init__(self, df, model, row_index):
        self.df = df
        self.model = model
        self.row_index = row_index
        self.deleted_row = None
        self.deleted_index = None

    def execute(self):
        self.deleted_row = self.df.iloc[self.row_index].copy()
        self.deleted_index = self.df.index[self.row_index]
        self.df.drop(self.deleted_index, inplace=True)
        self.model.beginRemoveRows(QModelIndex(), self.row_index, self.row_index)
        self.model.endRemoveRows()

    def undo(self):
        self.df = pd.concat([
            self.df.iloc[:self.row_index],
            pd.DataFrame([self.deleted_row], index=[self.deleted_index]),
            self.df.iloc[self.row_index:]
        ]).reset_index(drop=False)
        self.model.beginInsertRows(QModelIndex(), self.row_index, self.row_index)
        self.model.endInsertRows()


class AddColumnCommand(Command):
    def __init__(self, df, model, column_name):
        self.df = df
        self.model = model
        self.column_name = column_name

    def execute(self):
        self.df[self.column_name] = np.nan  # Initialize with NaN
        self.model._data = self.df
        self.model.beginResetModel()
        self.model.endResetModel()

    def undo(self):
        self.df.drop(columns=[self.column_name], inplace=True)
        self.model.layoutAboutToBeChanged.emit()
        self.model._data = self.df
        self.model.layoutChanged.emit()


class DeleteColumnCommand(Command):
    def __init__(self, df, model, column_index):
        self.df = df
        self.model = model
        self.column_index = column_index
        self.deleted_column = None
        self.deleted_column_name = None  # Store the column name

    def execute(self):
        self.deleted_column_name = self.df.columns[self.column_index]  # Store the column name
        self.deleted_column = self.df[self.deleted_column_name].copy()
        self.df.drop(self.deleted_column_name, axis=1, inplace=True)
        self.model.layoutAboutToBeChanged.emit()
        self.model._data = self.df
        self.model.layoutChanged.emit()

    def undo(self):
        self.df.insert(self.column_index, self.deleted_column_name, self.deleted_column)
        self.model.layoutAboutToBeChanged.emit()
        self.model._data = self.df
        self.model.layoutChanged.emit()

class DeleteMultipleRowsCommand(Command):
    def __init__(self, df, model, row_indices):
        self.df = df
        self.model = model
        self.row_indices = sorted(row_indices)
        self.deleted_rows = None
        self.deleted_indices = None

    def execute(self):
        self.deleted_rows = self.df.iloc[self.row_indices].copy()
        self.deleted_indices = self.df.index[self.row_indices]
        self.model.beginRemoveRows(QModelIndex(), self.row_indices[0], self.row_indices[-1])
        self.df.drop(self.deleted_indices, inplace=True)
        self.model._data = self.df
        self.model.endRemoveRows()

    def undo(self):
        self.model.beginInsertRows(QModelIndex(), self.row_indices[0], self.row_indices[-1])
        for idx, row in zip(self.deleted_indices, self.deleted_rows.iterrows()):
            self.df.loc[idx] = row[1]
        self.df.sort_index(inplace=True)
        self.model._data = self.df
        self.model.endInsertRows()

class CommandManager:
    def __init__(self):
        self.undo_stack = []
        self.redo_stack = []

    def execute(self, command):
        command.execute()
        self.undo_stack.append(command)
        self.redo_stack.clear()

    def undo(self):
        if self.undo_stack:
            command = self.undo_stack.pop()
            command.undo()
            self.redo_stack.append(command)

    def redo(self):
        if self.redo_stack:
            command = self.redo_stack.pop()
            command.execute()
            self.undo_stack.append(command)


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("EDM")
        self.setGeometry(100, 100, 800, 600)

        self.df = None
        self.model = None
        self.command_manager = CommandManager()

        self._setup_ui()

    def _setup_ui(self):
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        main_layout = QVBoxLayout(central_widget)

        tabs_container = QWidget()
        tabs_container_layout = QVBoxLayout(tabs_container)
        tabs_container_layout.setAlignment(Qt.AlignLeft)
        tabs_container_layout.setContentsMargins(0, 0, 0, 0)

        tabs = QTabWidget()
        tabs.setTabPosition(QTabWidget.North)
        tabs.setTabShape(QTabWidget.Triangular)
        tabs.tabBar().setExpanding(True)

        data_editor_tab = self._create_data_editor_tab()
        optimal_embedding_tab = self._create_optimal_embedding_tab()

        tabs.addTab(data_editor_tab, "Data Editor")
        tabs.addTab(optimal_embedding_tab, "Optimal Embedding")

        tabs_container_layout.addWidget(tabs)
        main_layout.addWidget(tabs_container)

        tabs.currentChanged.connect(self._on_tab_changed)

    def _create_data_editor_tab(self):
        data_editor_widget = QWidget()
        layout = QVBoxLayout(data_editor_widget)

        toolbar_layout = QVBoxLayout()
        self.toolbar = self._create_toolbar()
        toolbar_layout.addWidget(self.toolbar)

        self.data_table_view = QTableView()
        self.data_table_view.horizontalHeader().setStretchLastSection(True)
        self.data_table_view.verticalHeader().setVisible(False)
        self.data_table_view.setEditTriggers(QTableView.DoubleClicked | QTableView.EditKeyPressed)

        self.variable_viewer = VariableViewer()
        self.variable_viewer.variable_changed.connect(self._on_variable_changed)
        self.variable_viewer.variable_added.connect(self._on_variable_added)
        self.variable_viewer.variable_deleted.connect(self._on_variable_deleted)
        self.variable_viewer.row_added.connect(self._on_add_row)  # Ensure this connection is made
        self.variable_viewer.row_deleted.connect(self._on_delete_row)

        splitter = QSplitter(Qt.Horizontal)
        splitter.addWidget(self.data_table_view)
        splitter.addWidget(self.variable_viewer)

        toolbar_layout.addWidget(splitter)
        layout.addLayout(toolbar_layout)

        self._update_button_states()

        return data_editor_widget

    def _create_toolbar(self):
        toolbar = QToolBar("Main Toolbar", self)
        toolbar.setFloatable(False)
        toolbar.setMovable(False)
        toolbar.setToolButtonStyle(Qt.ToolButtonTextBesideIcon)
        toolbar.setIconSize(QSize(16, 16))

        self._add_file_menu_to_toolbar(toolbar)
        self._add_edit_menu_to_toolbar(toolbar)

        return toolbar

    def _add_file_menu_to_toolbar(self, toolbar):
        file_button = QToolButton(self)
        file_button.setIcon(QIcon("/Users/sergiymuzyka/Desktop/Python/Python/P/folder--plus.png"))
        file_button.setText("File")
        file_button.setPopupMode(QToolButton.MenuButtonPopup)
        file_menu = QMenu(self)
        file_menu.addAction("Save", self.placeholder_action)
        file_menu.addAction("Load", self.load_csv)
        file_menu.addAction("Create New Data Set", self.create_new_data_set)
        file_button.setMenu(file_menu)
        toolbar.addWidget(file_button)

    def _add_edit_menu_to_toolbar(self, toolbar):
        edit_button = QToolButton(self)
        edit_button.setIcon(QIcon("/Users/sergiymuzyka/Desktop/Python/Python/P/hammer.png"))
        edit_button.setText("Edit")
        edit_button.setPopupMode(QToolButton.MenuButtonPopup)
        edit_menu = QMenu(self)
        edit_menu.addAction("Undo", self.undo_action)
        edit_menu.addAction("Redo", self.redo_action)
        edit_button.setMenu(edit_menu)
        toolbar.addWidget(edit_button)

    def _create_optimal_embedding_tab(self):
        optimal_embedding_widget = QWidget()
        layout = QVBoxLayout(optimal_embedding_widget)
        optimal_embedding_list = QListWidget()
        optimal_embedding_list.addItems(["Placeholder for Optimal Embedding Tab"])
        layout.addWidget(optimal_embedding_list)
        return optimal_embedding_widget

    def _on_tab_changed(self, index):
        self.toolbar.setVisible(index == 0)

    def placeholder_action(self):
        print("Placeholder action triggered.")

    def load_csv(self):
        file_path, _ = QFileDialog.getOpenFileName(self, "Load CSV File", "", "CSV Files (*.csv)")
        if file_path:
            try:
                new_df = pd.read_csv(file_path)
                if self.df is not None:
                    reply = QMessageBox.question(self, "Overwrite Data?",
                                                 "A DataFrame already exists. Do you want to overwrite it?",
                                                 QMessageBox.Yes | QMessageBox.No)
                    if reply == QMessageBox.No:
                        return
                self.df = new_df
                self.model = PandasModel(self.df)
                self.data_table_view.setModel(self.model)
                self.variable_viewer.populate_variables(self.df.columns, self.df.dtypes)
                self.model.column_dtype_changed.connect(self.variable_viewer.update_dtype_in_viewer)
                self._update_button_states()
            except Exception as e:
                self._handle_error(f"Error loading CSV: {e}")

    def _on_variable_changed(self, index, property_name, new_value):
        if self.df is not None:
            if property_name == "name":
                self.df.rename(columns={self.df.columns[index]: new_value}, inplace=True)
            elif property_name == "type":
                self.model.update_column_dtype(index, new_value)
            self._update_model_and_view()
            self._update_button_states()

    def create_new_data_set(self):
        if self.df is not None:
            reply = QMessageBox.question(self, "Overwrite Data?",
                                         "A DataFrame already exists. Do you want to overwrite it?",
                                         QMessageBox.Yes | QMessageBox.No)
            if reply == QMessageBox.No:
                return

        num_columns, ok1 = QInputDialog.getInt(self, "New Data Set", "Enter the number of columns:", 1, 1)
        num_rows, ok2 = QInputDialog.getInt(self, "New Data Set", "Enter the number of rows:", 1, 1)

        if not ok1 or not ok2:
            return

        try:
            columns = [f"Column{i + 1}" for i in range(num_columns)]
            data = [[np.nan] * num_columns for _ in range(num_rows)]  # Use np.nan instead of None
            self.df = pd.DataFrame(data, columns=columns)

            # Ensure the model is updated with the new DataFrame
            self._update_model_and_view()
            self._update_button_states()

            QMessageBox.information(self, "Success", "New data set created successfully.")

        except Exception as e:
            self._handle_error(f"Error creating new data set: {e}")

    def _on_variable_added(self):
        if self.df is not None:
            new_col_name = f"NewColumn_{len(self.df.columns) + 1}"
            command = AddColumnCommand(self.df, self.model, new_col_name)
            self.command_manager.execute(command)
            self._update_model_and_view()
            self._update_button_states()

    def _on_variable_deleted(self, index):
        if self.df is not None and not self.df.empty:
            command = DeleteColumnCommand(self.df, self.model, index)
            self.command_manager.execute(command)
            self._update_model_and_view()
            self._update_button_states()

    def _on_add_row(self):
        if self.df is not None:
            command = AddRowCommand(self.df, self.model)
            self.command_manager.execute(command)
            self._update_model_and_view()  # Ensure the model and view are updated
        else:
            QMessageBox.warning(self, "No Data", "Please load or create a DataFrame before trying to add a row.")

    def _on_delete_row(self):
        selected_rows = self.data_table_view.selectionModel().selectedRows()
        if selected_rows:
            rows_to_delete = sorted([row.row() for row in selected_rows], reverse=True)
            command = DeleteMultipleRowsCommand(self.df, self.model, rows_to_delete)
            self.command_manager.execute(command)
            self._update_model_and_view()  # Ensure the model and view are updated
        else:
            QMessageBox.warning(self, "No Selection", "Please select one or more rows to delete.")

    def _update_model_and_view(self):
        if self.df is not None:
            if self.model is None:
                self.model = PandasModel(self.df)
            else:
                self.model.layoutAboutToBeChanged.emit()
                self.model._data = self.df
                self.model.layoutChanged.emit()
            self.data_table_view.setModel(self.model)
            self.variable_viewer.populate_variables(self.df.columns, self.df.dtypes)

    def _update_button_states(self):
        if self.df is None:
            self.variable_viewer.add_variable_button.setEnabled(False)
            self.variable_viewer.delete_variable_button.setEnabled(False)
            self.variable_viewer.add_row_button.setEnabled(False)
            self.variable_viewer.delete_row_button.setEnabled(False)
        else:
            self.variable_viewer.add_variable_button.setEnabled(True)
            self.variable_viewer.delete_variable_button.setEnabled(True)
            self.variable_viewer.add_row_button.setEnabled(True)
            self.variable_viewer.delete_row_button.setEnabled(True)

    def _handle_error(self, message):
        print(message)
        QMessageBox.critical(self, "Error", message)

    def undo_action(self):
        self.command_manager.undo()
        self._update_model_and_view()

    def redo_action(self):
        self.command_manager.redo()
        self._update_model_and_view()


if __name__ == "__main__":
    app = QApplication(sys.argv)

    # Apply a custom style sheet for better visual appeal
    app.setStyleSheet("""
    /* Main colors and fonts */
    QWidget {
        background-color: #1e1e1e;
        color: #ffffff;
        font-family: 'Arial', 'Segoe UI', sans-serif;
        font-size: 14px;
    }

    QMainWindow {
        background-color: #121212;
    }

    /* Tab Widget */
    QTabWidget::pane {
        border: 1px solid #2a2a2a;
        background-color: #1e1e1e;
        border-radius: 0;
    }

    QTabBar::tab {
        background: #2a2a2a;
        color: #b0b0b0;
        border: none;
        padding: 8px 16px;
        margin-right: 2px;
        font-weight: bold;
        text-transform: uppercase;
    }

    QTabBar::tab:selected {
        background: #008080;  /* Teal */
        color: #ffffff;
    }

    QTabBar::tab:hover:!selected {
        background: #3a3a3a;
    }

    /* Toolbar */
    QToolBar {
        background-color: #2a2a2a;
        border: none;
        spacing: 6px;
        padding: 3px;
    }

    QToolButton {
        background-color: #2a2a2a;
        border: none;
        border-radius: 4px;
        padding: 5px;
        color: #ffffff;
    }

    QToolButton:hover {
        background-color: #3a3a3a;
    }

    QToolButton:pressed {
        background-color: #008080;  /* Teal */
    }

    /* Table View */
    QTableView {
        background-color: #1e1e1e;
        border: 1px solid #008080;  /* Teal border */
        gridline-color: #2a2a2a;
        selection-background-color: #008080;  /* Teal selection */
        selection-color: #ffffff;
    }

    QTableView::item {
        padding: 5px;
        border: 1px solid #2a2a2a;
    }

    QTableView::item:selected {
        background-color: rgba(0, 128, 128, 0.7);  /* Semi-transparent Teal */
        color: #ffffff;
    }

    QTableView::item:hover {
        background-color: rgba(255, 111, 97, 0.3);  /* Semi-transparent Coral */
    }

    QHeaderView::section {
        background-color: #2a2a2a;
        color: #ffffff;
        padding: 5px;
        border: 1px solid #008080;  /* Teal border */
        font-weight: bold;
    }

    QHeaderView::section:hover {
        background-color: #008080;  /* Teal */
    }

    /* Buttons */
    QPushButton {
        background-color: #ff6f61;  /* Coral */
        color: #ffffff;
        border: none;
        padding: 8px 16px;
        border-radius: 4px;
        font-weight: bold;
    }

    QPushButton:hover {
        background-color: #ff8f81;
    }

    QPushButton:pressed {
        background-color: #ff4f41;
    }

    /* Combo Box */
    QComboBox {
        background-color: #2a2a2a;
        border: 1px solid #3a3a3a;
        border-radius: 4px;
        padding: 5px;
        min-width: 6em;
        color: #ffffff;
    }

    QComboBox:hover {
        border-color: #008080;  /* Teal */
    }

    QComboBox::drop-down {
        subcontrol-origin: padding;
        subcontrol-position: top right;
        width: 20px;
        border-left: 1px solid #3a3a3a;
        border-top-right-radius: 3px;
        border-bottom-right-radius: 3px;
    }

    QComboBox::down-arrow {
        image: url(down_arrow_white.png);
    }

    /* Line Edit */
    QLineEdit {
        background-color: #2a2a2a;
        border: 1px solid #3a3a3a;
        border-radius: 4px;
        padding: 5px;
        color: #ffffff;
    }

    QLineEdit:focus {
        border-color: #008080;  /* Teal */
    }

    /* List Widget (Variable View) */
    QListWidget {
        background-color: #1e1e1e;
        border: 1px solid #008080;  /* Teal border */
        border-radius: 4px;
    }

    QListWidget::item {
        padding: 5px;
        border-bottom: 1px solid #2a2a2a;
    }

    QListWidget::item:selected {
        background-color: rgba(0, 128, 128, 0.7);  /* Semi-transparent Teal */
        color: #ffffff;
    }

    QListWidget::item:hover {
        background-color: rgba(255, 111, 97, 0.3);  /* Semi-transparent Coral */
    }

    /* Variable Viewer specific styles */
    #variable_list QWidget {
        background-color: #1e1e1e;
    }

    #variable_list QLineEdit {
        background-color: #2a2a2a;
        border: 1px solid #3a3a3a;
        border-radius: 4px;
        padding: 5px;
        color: #ffffff;
    }

    #variable_list QLineEdit:focus {
        border-color: #008080;  /* Teal */
    }

    #variable_list QComboBox {
        background-color: #2a2a2a;
        border: 1px solid #3a3a3a;
        border-radius: 4px;
        padding: 5px;
        color: #ffffff;
    }

    #variable_list QComboBox:hover {
        border-color: #ff6f61;  /* Coral */
    }

    /* Message Box */
    QMessageBox {
        background-color: #1e1e1e;
    }

    QMessageBox QLabel {
        color: #ffffff;
    }

    QMessageBox QPushButton {
        background-color: #008080;  /* Teal */
        color: #ffffff;
        border: none;
        padding: 8px 16px;
        border-radius: 4px;
        font-weight: bold;
    }

    QMessageBox QPushButton:hover {
        background-color: #009999;
    }

    /* Scrollbar */
    QScrollBar:vertical {
        border: none;
        background-color: #2a2a2a;
        width: 10px;
        margin: 0px;
    }

    QScrollBar::handle:vertical {
        background-color: #3a3a3a;
        min-height: 20px;
        border-radius: 5px;
    }

    QScrollBar::handle:vertical:hover {
        background-color: #008080;  /* Teal */
    }

    QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {
        height: 0px;
    }

    QScrollBar:horizontal {
        border: none;
        background-color: #2a2a2a;
        height: 10px;
        margin: 0px;
    }

    QScrollBar::handle:horizontal {
        background-color: #3a3a3a;
        min-width: 20px;
        border-radius: 5px;
    }

    QScrollBar::handle:horizontal:hover {
        background-color: #008080;  /* Teal */
    }

    QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal {
        width: 0px;
    }

    /* Splitter */
    QSplitter::handle {
        background-color: #2a2a2a;
    }

    QSplitter::handle:hover {
        background-color: #008080;  /* Teal */
    }

    /* Status Bar */
    QStatusBar {
        background-color: #1e1e1e;
        color: #b0b0b0;
    }
    """)

    window = MainWindow()
    window.show()
    sys.exit(app.exec())"