diff --git a/app.py b/app.py
index 37c5430..182d5cd 100644
--- a/app.py
+++ b/app.py
@@ -46,7 +46,7 @@ class Launcher(QApplication, LauncherObject):
         self.game_manager = GameManager(self)
 
         # Window config
-        self.setApplicationName("TestLauncher")
+        self.setApplicationName("TapLauncher")
         self.main_window = LauncherMainWindow(
             app=self
         )
@@ -139,7 +139,8 @@ class Launcher(QApplication, LauncherObject):
 
     @property
     def default_game_dir(self) -> Path:
-        return self.work_dir / "minecraft" if sys.platform.lower() == "darwin" else self.work_dir / ".minecraft"
+        # Completely with official Minecraft launcher
+        return self.work_dir
 
     @property
     def resources_dir(self):
diff --git a/manager/profile.py b/manager/profile.py
index b1df0c3..482ed9c 100644
--- a/manager/profile.py
+++ b/manager/profile.py
@@ -667,13 +667,13 @@ class ProfileManager(QObject):
         if not isinstance(request.icon, str):
             errors["icon"] = "Icon must be a string."
 
-        if request.game_dir is not _UNSET:
+        if request.game_dir is not _UNSET and request.game_dir is not None:
             try:
                 Path(request.game_dir)
             except (TypeError, ValueError):
                 errors["game_dir"] = "Game directory is invalid."
 
-        if request.game_dir is not _UNSET:
+        if request.resolution is not _UNSET and request.resolution is not None:
             if not isinstance(request.resolution, tuple) or len(request.resolution) != 2:
                 errors["resolution"] = (
                     "Resolution must contain width and height."
diff --git a/manager/settings_models.py b/manager/settings_models.py
new file mode 100644
index 0000000..c270756
--- /dev/null
+++ b/manager/settings_models.py
@@ -0,0 +1,26 @@
+"""Launcher settings schemas persisted by SettingsManager."""
+
+from typing import Literal
+from uuid import UUID
+
+from pydantic import BaseModel, ConfigDict
+
+from constant import CLIENT_ID
+
+
+class GeneralSettings(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    language: Literal["en", "zh-TW"] = "zh-TW"
+
+
+class AppearanceSettings(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    theme: Literal["system", "light", "dark"] = "system"
+
+
+class AccountSettings(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    client_id: UUID = UUID(CLIENT_ID)
diff --git a/pages/manage_profile.py b/pages/manage_profile.py
new file mode 100644
index 0000000..29c4d4b
--- /dev/null
+++ b/pages/manage_profile.py
@@ -0,0 +1,312 @@
+import shutil
+from pathlib import Path
+
+from PySide6.QtCore import Qt, QUrl, Signal
+from PySide6.QtGui import QDesktopServices, QIcon
+from PySide6.QtWidgets import (
+    QFileDialog, QFormLayout, QFrame, QHBoxLayout, QLabel, QLineEdit,
+    QMessageBox, QPushButton, QScrollArea, QSizePolicy, QSpinBox,
+    QVBoxLayout, QWidget,
+)
+
+from manager.profile import ProfileDetail, ProfileManager, ProfileSummary, UpdateProfileRequest
+
+
+class ManageProfileItem(QPushButton):
+    selected = Signal(object)
+
+    def __init__(self, app, profile: ProfileSummary, parent=None):
+        super().__init__(parent)
+        self.profile = profile
+        self.setObjectName("manageProfileItem")
+        self.setCheckable(True)
+        self.setCursor(Qt.CursorShape.PointingHandCursor)
+        self.setMinimumHeight(64)
+
+        layout = QHBoxLayout(self)
+        layout.setContentsMargins(12, 8, 12, 8)
+        layout.setSpacing(12)
+
+        icon_path = Path(profile.icon)
+        if not icon_path.is_file():
+            icon_path = Path(app.icon_dir, "profile_default.png")
+        icon = QLabel()
+        icon.setFixedSize(40, 40)
+        icon.setPixmap(QIcon(icon_path.as_posix()).pixmap(36, 36))
+        icon.setAlignment(Qt.AlignmentFlag.AlignCenter)
+
+        texts = QVBoxLayout()
+        texts.setSpacing(1)
+        name = QLabel(profile.display_name)
+        name.setObjectName("itemName")
+        version = QLabel(profile.version_id)
+        version.setObjectName("itemVersion")
+        texts.addWidget(name)
+        texts.addWidget(version)
+
+        layout.addWidget(icon)
+        layout.addLayout(texts, 1)
+        self.clicked.connect(lambda: self.selected.emit(self.profile))
+
+
+class ManageProfilePage(QWidget):
+    """Select a profile on the left and edit its launcher settings on the right."""
+
+    def __init__(self, app, parent=None):
+        super().__init__(parent)
+        self.app = app
+        self.profile_manager: ProfileManager = app.profile_manager
+        self.selected_profile_id: str | None = None
+        self.profile_items: dict[str, ManageProfileItem] = {}
+
+        root = QVBoxLayout(self)
+        title = QLabel("Manage Profiles (Experimental)")
+        title.setObjectName("manageTitle")
+        root.addWidget(title)
+
+        columns = QHBoxLayout()
+        columns.setSpacing(12)
+        root.addLayout(columns, 1)
+
+        self.list_scroll = self._scroll_area("manageProfileListScroll")
+        self.list_content = QWidget()
+        self.list_layout = QVBoxLayout(self.list_content)
+        self.list_layout.setContentsMargins(6, 6, 6, 6)
+        self.list_layout.setSpacing(4)
+        self.list_layout.setAlignment(Qt.AlignmentFlag.AlignTop)
+        self.list_scroll.setWidget(self.list_content)
+        self.list_scroll.setMinimumWidth(260)
+        self.list_scroll.setMaximumWidth(380)
+        columns.addWidget(self.list_scroll, 2)
+
+        self.options_scroll = self._scroll_area("manageProfileOptionsScroll")
+        self.options_content = QWidget()
+        self.options_layout = QVBoxLayout(self.options_content)
+        self.options_layout.setContentsMargins(20, 16, 20, 20)
+        self.options_layout.setSpacing(14)
+        self.options_scroll.setWidget(self.options_content)
+        columns.addWidget(self.options_scroll, 3)
+
+        self.empty_label = QLabel("Select a profile from the list to edit its settings.")
+        self.empty_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.empty_label.setWordWrap(True)
+        self.options_layout.addWidget(self.empty_label, 1)
+
+        self.editor = QFrame()
+        self.editor.setObjectName("profileEditor")
+        editor_layout = QVBoxLayout(self.editor)
+        editor_layout.setSpacing(14)
+        form = QFormLayout()
+        form.setFieldGrowthPolicy(QFormLayout.FieldGrowthPolicy.ExpandingFieldsGrow)
+        form.setVerticalSpacing(12)
+
+        self.name_edit = QLineEdit()
+        self.version_edit = QLineEdit()
+        self.type_edit = QLineEdit()
+        self.game_dir_edit = QLineEdit()
+        self.java_args_edit = QLineEdit()
+        self.icon_edit = QLineEdit()
+        self.width_spin = self._dimension_spin()
+        self.height_spin = self._dimension_spin()
+
+        form.addRow("Profile name", self.name_edit)
+        form.addRow("Version ID", self.version_edit)
+        form.addRow("Profile type", self.type_edit)
+        form.addRow("Game directory", self.game_dir_edit)
+        form.addRow("Java arguments", self.java_args_edit)
+        form.addRow("Icon", self.icon_edit)
+
+        resolution = QHBoxLayout()
+        resolution.addWidget(self.width_spin)
+        resolution.addWidget(QLabel("×"))
+        resolution.addWidget(self.height_spin)
+        form.addRow("Resolution", resolution)
+        editor_layout.addLayout(form)
+
+        file_actions = QHBoxLayout()
+        open_button = QPushButton("Open Profile Folder")
+        open_button.clicked.connect(self.open_profile_folder)
+        import_button = QPushButton("Import Mods…")
+        import_button.clicked.connect(self.import_mods)
+        file_actions.addWidget(open_button)
+        file_actions.addWidget(import_button)
+        file_actions.addStretch()
+        editor_layout.addLayout(file_actions)
+
+        actions = QHBoxLayout()
+        duplicate_button = QPushButton("Duplicate")
+        duplicate_button.clicked.connect(self.duplicate_profile)
+        delete_button = QPushButton("Delete")
+        delete_button.setObjectName("dangerButton")
+        delete_button.clicked.connect(self.delete_profile)
+        save_button = QPushButton("Save Changes")
+        save_button.setObjectName("saveProfileButton")
+        save_button.clicked.connect(self.save_profile)
+        actions.addWidget(duplicate_button)
+        actions.addWidget(delete_button)
+        actions.addStretch()
+        actions.addWidget(save_button)
+        editor_layout.addLayout(actions)
+
+        self.options_layout.addWidget(self.editor)
+        self.options_layout.addStretch()
+        self.editor.hide()
+
+        self.profile_manager.profiles_changed.connect(self.load_profiles)
+        self.app.apply_qss(Path("manage_profile.qss"), self.setStyleSheet)
+        self.load_profiles()
+
+    @staticmethod
+    def _scroll_area(name: str) -> QScrollArea:
+        area = QScrollArea()
+        area.setObjectName(name)
+        area.setWidgetResizable(True)
+        area.setFrameShape(QFrame.Shape.NoFrame)
+        area.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
+        return area
+
+    @staticmethod
+    def _dimension_spin() -> QSpinBox:
+        spin = QSpinBox()
+        spin.setRange(0, 16384)
+        spin.setSpecialValueText("Default")
+        spin.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Fixed)
+        return spin
+
+    def load_profiles(self) -> None:
+        while self.list_layout.count():
+            item = self.list_layout.takeAt(0)
+            if item.widget():
+                item.widget().deleteLater()
+        self.profile_items.clear()
+
+        profiles = self.profile_manager.list_profiles()
+        for profile in profiles:
+            item = ManageProfileItem(self.app, profile, self.list_content)
+            item.selected.connect(self.select_profile)
+            self.profile_items[profile.id] = item
+            self.list_layout.addWidget(item)
+
+        available_ids = {profile.id for profile in profiles}
+        if self.selected_profile_id not in available_ids:
+            self.selected_profile_id = None
+        if self.selected_profile_id is None and profiles:
+            current = self.profile_manager.get_current_profile_id()
+            selected = next((p for p in profiles if p.id == current), profiles[0])
+            self.select_profile(selected)
+        elif self.selected_profile_id:
+            profile = next(p for p in profiles if p.id == self.selected_profile_id)
+            self.select_profile(profile)
+        else:
+            self.editor.hide()
+            self.empty_label.show()
+
+    def select_profile(self, profile: ProfileSummary) -> None:
+        detail = self.profile_manager.get_profile(profile.id)
+        if detail is None:
+            return
+        self.selected_profile_id = profile.id
+        for profile_id, item in self.profile_items.items():
+            item.setChecked(profile_id == profile.id)
+        self._set_detail(detail)
+        self.empty_label.hide()
+        self.editor.show()
+
+    def _set_detail(self, profile: ProfileDetail) -> None:
+        self.name_edit.setText(profile.name)
+        self.version_edit.setText(profile.version_id)
+        self.type_edit.setText(profile.version_type)
+        self.game_dir_edit.setText(str(profile.game_dir or ""))
+        self.java_args_edit.setText(profile.java_args)
+        self.icon_edit.setText(profile.icon)
+        width, height = profile.resolution or (0, 0)
+        self.width_spin.setValue(width)
+        self.height_spin.setValue(height)
+
+    def _profile_dir(self) -> Path | None:
+        if self.selected_profile_id is None:
+            return None
+        detail = self.profile_manager.get_profile(self.selected_profile_id)
+        if detail is None:
+            return None
+        return detail.game_dir or Path(self.app.default_game_dir)
+
+    def save_profile(self) -> None:
+        if self.selected_profile_id is None:
+            return
+        width, height = self.width_spin.value(), self.height_spin.value()
+        if (width == 0) != (height == 0):
+            self.app.widget_manager.signal.show_warning_message.emit(
+                "Set both resolution values, or set both to Default."
+            )
+            return
+        game_dir_text = self.game_dir_edit.text().strip()
+        request = UpdateProfileRequest(
+            name=self.name_edit.text().strip(),
+            version_id=self.version_edit.text().strip(),
+            version_type=self.type_edit.text().strip(),
+            game_dir=Path(game_dir_text) if game_dir_text else None,
+            java_args=self.java_args_edit.text(),
+            icon=self.icon_edit.text().strip(),
+            resolution=(width, height) if width and height else None,
+        )
+        if self.profile_manager.validate_update(request).is_valid and self.profile_manager.update_profile(
+            self.selected_profile_id, request
+        ):
+            self.profile_manager.save()
+            self.app.widget_manager.signal.show_info_message.emit("Profile settings saved.")
+        else:
+            errors = self.profile_manager.validate_update(request).errors
+            if errors:
+                self.app.widget_manager.signal.show_warning_message.emit("\n".join(errors.values()))
+
+    def open_profile_folder(self) -> None:
+        profile_dir = self._profile_dir()
+        if profile_dir is None:
+            return
+        profile_dir.mkdir(parents=True, exist_ok=True)
+        QDesktopServices.openUrl(QUrl.fromLocalFile(str(profile_dir.resolve())))
+
+    def import_mods(self) -> None:
+        profile_dir = self._profile_dir()
+        if profile_dir is None:
+            return
+        files, _ = QFileDialog.getOpenFileNames(
+            self, "Import Mods", "", "Minecraft mods (*.jar *.zip);;All files (*)"
+        )
+        if not files:
+            return
+        mods_dir = profile_dir / "mods"
+        mods_dir.mkdir(parents=True, exist_ok=True)
+        try:
+            for source in files:
+                shutil.copy2(source, mods_dir / Path(source).name)
+        except OSError as error:
+            self.app.widget_manager.signal.show_error_message.emit(f"Unable to import mod: {error}")
+            return
+        self.app.widget_manager.signal.show_info_message.emit(
+            f"Imported {len(files)} mod(s) into {mods_dir}."
+        )
+
+    def duplicate_profile(self) -> None:
+        if self.selected_profile_id is None:
+            return
+        new_id = self.profile_manager.duplicate_profile(self.selected_profile_id)
+        if new_id:
+            self.selected_profile_id = new_id
+            self.load_profiles()
+            self.profile_manager.save()
+
+    def delete_profile(self) -> None:
+        if self.selected_profile_id is None:
+            return
+        answer = QMessageBox.question(
+            self, "Delete Profile", "Delete this profile? Game files will not be removed.",
+            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
+            QMessageBox.StandardButton.No,
+        )
+        if answer == QMessageBox.StandardButton.Yes:
+            profile_id = self.selected_profile_id
+            self.selected_profile_id = None
+            if self.profile_manager.remove_profile(profile_id):
+                self.profile_manager.save()
diff --git a/resources/icons/profile_edit.png b/resources/icons/profile_edit.png
new file mode 100644
index 0000000..ff7db35
Binary files /dev/null and b/resources/icons/profile_edit.png differ
diff --git a/resources/styles/manage_profile.qss b/resources/styles/manage_profile.qss
new file mode 100644
index 0000000..9f6071e
--- /dev/null
+++ b/resources/styles/manage_profile.qss
@@ -0,0 +1,33 @@
+QLabel#manageTitle {
+    font-size: 24px;
+    font-weight: 700;
+    padding: 4px 2px 8px 2px;
+}
+
+QScrollArea#manageProfileListScroll,
+QScrollArea#manageProfileOptionsScroll {
+    background: palette(base);
+    border: 1px solid palette(mid);
+    border-radius: 8px;
+}
+
+QPushButton#manageProfileItem {
+    background: transparent;
+    border: none;
+    border-radius: 6px;
+    text-align: left;
+}
+
+QLabel#itemVersion {
+    color: #aeb6c2;
+    font-size: 12px;
+}
+
+QPushButton#manageProfileItem:hover { background: palette(midlight); }
+QPushButton#manageProfileItem:checked { background: #3d6fb4; }
+
+QLabel#itemName { font-size: 15px; font-weight: 600; }
+
+QFrame#profileEditor { background: transparent; }
+QPushButton#saveProfileButton { min-width: 130px; font-weight: 600; }
+QPushButton#dangerButton { color: #e56b6f; }
diff --git a/resources/styles/settings.qss b/resources/styles/settings.qss
new file mode 100644
index 0000000..cbc8780
--- /dev/null
+++ b/resources/styles/settings.qss
@@ -0,0 +1,84 @@
+QWidget#settingsPage,
+QWidget#settingsMainPage,
+QWidget#settingsScrollContent {
+    background-color: palette(window);
+}
+
+QScrollArea#settingsScrollArea {
+    border: none;
+    background-color: palette(window);
+}
+
+QScrollArea#settingsScrollArea > QWidget > QWidget {
+    background-color: palette(window);
+}
+
+QLabel#settingsPageTitle {
+    font-size: 18pt;
+    font-weight: bold;
+}
+
+QPushButton#settingsItem {
+    min-height: 68px;
+    border: 1px solid palette(mid);
+    border-radius: 8px;
+    background-color: palette(button);
+    text-align: left;
+}
+
+QPushButton#settingsItem:hover {
+    background-color: palette(midlight);
+}
+
+QPushButton#settingsItem:pressed {
+    background-color: palette(dark);
+}
+
+QLabel#settingsItemTitle {
+    color: palette(button-text);
+    font-size: 11pt;
+    font-weight: bold;
+}
+
+QLabel#settingsItemDescription {
+    color: palette(placeholder-text);
+    font-size: 9pt;
+}
+
+QLabel#settingsHelpText {
+    color: palette(placeholder-text);
+    font-size: 9pt;
+}
+
+QPushButton#settingsBackButton {
+    border: none;
+    border-radius: 8px;
+    background-color: transparent;
+    font-size: 22px;
+}
+
+QPushButton#settingsBackButton:hover {
+    background-color: palette(button);
+}
+
+QPushButton#settingsBackButton:pressed {
+    background-color: palette(midlight);
+}
+
+QLabel#settingsSubPageTitle {
+    font-size: 15pt;
+    font-weight: bold;
+}
+
+QLabel#settingsBrand {
+    font-size: 20px;
+    font-weight: bold;
+}
+
+QLabel#settingsVersion {
+    font-size: 12px;
+}
+
+QPlainTextEdit#settingsDescription {
+    font-size: 13px;
+}
diff --git a/window.py b/window.py
index 21bbea5..40de299 100644
--- a/window.py
+++ b/window.py
@@ -16,6 +16,7 @@ from manager.widgets import AskForRequest, SelectPathRequest
 from pages.account import AccountPage
 from pages.create_profile  import CreateProfilePage
 from pages.launch_profile import LaunchProfilePage
+from pages.manage_profile import ManageProfilePage
 from pages.test import TestPage
 from pages.settings import SettingsPage
 
@@ -163,6 +164,9 @@ class LauncherMainWindow(QMainWindow):
         # Profile page
         self.create_profile_page = CreateProfilePage(self.app, self)
 
+        # Profile management page
+        self.manage_profile_page = ManageProfilePage(self.app, self)
+
         # Settings page
         self.settings_page = SettingsPage(self.app, self)
 
@@ -172,6 +176,7 @@ class LauncherMainWindow(QMainWindow):
         self.central.addWidget(self.account_page)
         self.central.addWidget(self.settings_page)
         self.central.addWidget(self.create_profile_page)
+        self.central.addWidget(self.manage_profile_page)
         self.central.addWidget(self.launch_profile_page)
 
         # Bind toolbar and center widget
@@ -193,24 +198,32 @@ class LauncherMainWindow(QMainWindow):
                                                                 icon=self.app.get_icon(Path(self.app.icon_dir, "profile_default.png"), True))
 
         # Home btn
-        self.home_button = self.toolbar.add_button(icon=self.app.get_icon(Path(self.app.icon_dir, "home.png")))
+        self.home_button = self.toolbar.add_button(" Home", icon=self.app.get_icon(Path(self.app.icon_dir, "home.png")))
 
         # Settings btn (will be moved to the bottom of the toolbar)
-        self.open_settings_page = self.toolbar.add_button(icon=self.app.get_icon(Path(self.app.icon_dir, "settings.png")))
+        self.open_settings_page = self.toolbar.add_button(" Settings", icon=self.app.get_icon(Path(self.app.icon_dir, "settings.png")))
 
         # Account btn (will be moved to the bottom (or last one item) of the toolbar
-        self.open_account_page = self.toolbar.add_button(icon=self.app.get_icon(Path(self.app.icon_dir, "head.png"), True))
+        self.open_account_page = self.toolbar.add_button(" Accounts", icon=self.app.get_icon(Path(self.app.icon_dir, "head.png"), True))
         self.account_page.set_related_button(self.open_account_page) # AccountPage require this to set button icon to
         # current account's avatar
 
         # Profile btn
-        self.open_create_profile_page = self.toolbar.add_button(icon=self.app.get_icon(Path(self.app.icon_dir, "add.png")))
+        self.open_create_profile_page = self.toolbar.add_button("Create Profile",
+                                                                icon=self.app.get_icon(Path(self.app.icon_dir, "add.png")))
+
+        # manage profile
+        self.open_manage_profile_page = self.toolbar.add_button(
+            " Manage Profiles",
+            icon=self.app.get_icon(Path(self.app.icon_dir, "profile_edit.png"), True),
+        )
 
         # Bind tool buttons
         self.toolbar.addWidget(self.home_button)
         self.toolbar.addWidget(self.open_test_page)
         self.toolbar.addWidget(self.open_create_profile_page)
         self.toolbar.addWidget(self.open_launch_profile_page)
+        self.toolbar.addWidget(self.open_manage_profile_page)
         self.toolbar.setMovable(True)
         self.toolbar.setFloatable(False)
         self.toolbar.setAllowedAreas(Qt.ToolBarArea.AllToolBarAreas)
@@ -245,6 +258,10 @@ class LauncherMainWindow(QMainWindow):
             lambda: self.set_current_page(self.create_profile_page, self.open_create_profile_page)
         )
 
+        self.open_manage_profile_page.clicked.connect(
+            lambda: self.set_current_page(self.manage_profile_page, self.open_manage_profile_page)
+        )
+
         # Bind signal event
         self.bind_event()