diff --git a/app/src/main/java/se/ajpanton/statusbartweak/shell/ui/MainActivity.java b/app/src/main/java/se/ajpanton/statusbartweak/shell/ui/MainActivity.java
index 41f5c3d..0d9c70d 100644
--- a/app/src/main/java/se/ajpanton/statusbartweak/shell/ui/MainActivity.java
+++ b/app/src/main/java/se/ajpanton/statusbartweak/shell/ui/MainActivity.java
@@ -5,7 +5,9 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 
+import androidx.activity.OnBackPressedCallback;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AppCompatActivity;
@@ -22,10 +24,16 @@ import se.ajpanton.statusbartweak.R;
 
 public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
     private static final String EXTRA_OPEN_NAV_ITEM = "open_nav_item";
+    private static final float PERMANENT_SIDEBAR_FOLDED_WIDTH_MULTIPLIER = 1.1f;
 
     private SafeInsetDrawerLayout drawerLayout;
-    private NavigationView navigationView;
-    private Integer navigationBasePaddingLeft;
+    private NavigationView drawerNavigationView;
+    private NavigationView permanentNavigationView;
+    private MaterialToolbar toolbar;
+    private ActionBarDrawerToggle drawerToggle;
+    private Integer drawerNavigationBasePaddingLeft;
+    private Integer permanentNavigationBasePaddingLeft;
+    private boolean permanentSidebar;
 
     public static Intent newOpenDebugIntent(Context context) {
         Intent intent = new Intent(context, MainActivity.class);
@@ -39,24 +47,42 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        MaterialToolbar toolbar = findViewById(R.id.toolbar);
+        toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
         drawerLayout = findViewById(R.id.drawer_layout);
-        navigationView = findViewById(R.id.nav_view);
-        navigationView.setNavigationItemSelectedListener(this);
-        navigationView.getMenu().setGroupCheckable(0, true, true);
+        drawerNavigationView = findViewById(R.id.nav_view_drawer);
+        permanentNavigationView = findViewById(R.id.nav_view_permanent);
+        setupNavigationView(drawerNavigationView);
+        setupNavigationView(permanentNavigationView);
         applyNavigationDrawerInsets();
 
-        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
+        drawerToggle = new ActionBarDrawerToggle(
                 this,
                 drawerLayout,
                 toolbar,
                 R.string.nav_open,
                 R.string.nav_close
         );
-        drawerLayout.addDrawerListener(toggle);
-        toggle.syncState();
+        drawerLayout.addDrawerListener(drawerToggle);
+        drawerToggle.syncState();
+        toolbar.setNavigationOnClickListener(v -> {
+            if (!permanentSidebar) {
+                drawerLayout.openDrawer(GravityCompat.START);
+            }
+        });
+        getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
+            @Override
+            public void handleOnBackPressed() {
+                if (!permanentSidebar && drawerLayout.isDrawerOpen(GravityCompat.START)) {
+                    drawerLayout.closeDrawer(GravityCompat.START);
+                    return;
+                }
+                setEnabled(false);
+                getOnBackPressedDispatcher().onBackPressed();
+                setEnabled(true);
+            }
+        });
 
         if (savedInstanceState == null) {
             int initialItemId = resolveInitialItemId(getIntent());
@@ -77,7 +103,9 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
     @Override
     public boolean onNavigationItemSelected(@NonNull android.view.MenuItem item) {
         navigateTo(item.getItemId());
-        drawerLayout.closeDrawer(GravityCompat.START);
+        if (!permanentSidebar) {
+            drawerLayout.closeDrawer(GravityCompat.START);
+        }
         return true;
     }
 
@@ -149,6 +177,11 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
     }
 
     private void syncDrawerSelection(int itemId) {
+        syncNavigationSelection(drawerNavigationView, itemId);
+        syncNavigationSelection(permanentNavigationView, itemId);
+    }
+
+    private void syncNavigationSelection(NavigationView navigationView, int itemId) {
         if (navigationView == null) {
             return;
         }
@@ -167,6 +200,17 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
         navigationView.invalidate();
     }
 
+    private void setupNavigationView(NavigationView navigationView) {
+        if (navigationView == null) {
+            return;
+        }
+        navigationView.setNavigationItemSelectedListener(this);
+        navigationView.getMenu().setGroupCheckable(0, true, true);
+        navigationView.addOnLayoutChangeListener((view, left, top, right, bottom,
+                                                  oldLeft, oldTop, oldRight, oldBottom) ->
+                updateNavigationHeaderHeight(navigationView));
+    }
+
     private int resolveInitialItemId(Intent intent) {
         int requested = resolveOpenItemId(intent);
         return requested != -1 ? requested : R.id.nav_layout;
@@ -195,6 +239,7 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
     private void applyNavigationDrawerMarginsFromRootInsets() {
         WindowInsetsCompat insets = ViewCompat.getRootWindowInsets(drawerLayout);
         if (insets == null) {
+            applyNavigationDrawerSafeArea(0, 0);
             return;
         }
         Insets safeInsets = insets.getInsetsIgnoringVisibility(
@@ -206,10 +251,25 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
         int safeLeft = Math.max(Math.max(0, leftInset), Math.max(0, drawerLayout.getPaddingLeft()));
         int safeRight = Math.max(Math.max(0, rightInset), Math.max(0, drawerLayout.getPaddingRight()));
         drawerLayout.setDrawerSafeInsets(safeLeft, safeRight);
-        if (navigationBasePaddingLeft == null) {
-            navigationBasePaddingLeft = navigationView.getPaddingLeft();
+        drawerNavigationBasePaddingLeft = applyNavigationLeftPadding(
+                drawerNavigationView,
+                drawerNavigationBasePaddingLeft,
+                safeLeft);
+        permanentNavigationBasePaddingLeft = applyNavigationLeftPadding(
+                permanentNavigationView,
+                permanentNavigationBasePaddingLeft,
+                0);
+        updatePermanentSidebarMode();
+    }
+
+    private Integer applyNavigationLeftPadding(NavigationView navigationView,
+                                               Integer basePaddingLeft,
+                                               int safeLeft) {
+        if (navigationView == null) {
+            return basePaddingLeft;
         }
-        int leftPadding = navigationBasePaddingLeft + safeLeft;
+        int base = basePaddingLeft != null ? basePaddingLeft : navigationView.getPaddingLeft();
+        int leftPadding = base + safeLeft;
         if (navigationView.getPaddingLeft() != leftPadding
                 || Math.round(navigationView.getTranslationX()) != 0) {
             navigationView.setTranslationX(0f);
@@ -220,5 +280,72 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
                     navigationView.getPaddingBottom());
             navigationView.requestLayout();
         }
+        return base;
+    }
+
+    private void updatePermanentSidebarMode() {
+        int rootWidth = drawerLayout.getWidth();
+        if (rootWidth <= 0) {
+            return;
+        }
+        int drawerWidth = getResources().getDimensionPixelSize(R.dimen.sbt_navigation_drawer_width);
+        int foldedPortraitWidth = getResources().getDimensionPixelSize(R.dimen.sbt_folded_portrait_width);
+        boolean shouldUsePermanentSidebar = rootWidth >= drawerWidth
+                + Math.round(foldedPortraitWidth * PERMANENT_SIDEBAR_FOLDED_WIDTH_MULTIPLIER);
+        if (permanentSidebar != shouldUsePermanentSidebar) {
+            permanentSidebar = shouldUsePermanentSidebar;
+            drawerToggle.setDrawerIndicatorEnabled(!permanentSidebar);
+            toolbar.setVisibility(permanentSidebar ? View.GONE : View.VISIBLE);
+            if (permanentSidebar) {
+                permanentNavigationView.setVisibility(View.VISIBLE);
+                drawerLayout.closeDrawer(GravityCompat.START, false);
+            } else {
+                drawerNavigationView.setVisibility(View.VISIBLE);
+                drawerLayout.closeDrawer(GravityCompat.START, false);
+                permanentNavigationView.setVisibility(View.GONE);
+                drawerNavigationView.requestLayout();
+            }
+            drawerToggle.syncState();
+        }
+        updateNavigationHeaderHeight(drawerNavigationView);
+        updateNavigationHeaderHeight(permanentNavigationView);
+    }
+
+    private void updateNavigationHeaderHeight(NavigationView navigationView) {
+        if (navigationView == null || navigationView.getHeaderCount() == 0) {
+            return;
+        }
+        int navigationHeight = navigationView.getHeight();
+        if (navigationHeight <= 0) {
+            return;
+        }
+        int menuRows = countVisibleMenuRows(navigationView.getMenu());
+        int menuHeight = menuRows * getResources().getDimensionPixelSize(R.dimen.sbt_navigation_menu_item_height);
+        int minHeaderHeight = getResources().getDimensionPixelSize(R.dimen.sbt_drawer_header_min_height);
+        int maxHeaderHeight = getResources().getDimensionPixelSize(R.dimen.sbt_drawer_header_max_height);
+        int desiredHeaderHeight = Math.max(
+                minHeaderHeight,
+                Math.min(maxHeaderHeight, navigationHeight - menuHeight));
+        View header = navigationView.getHeaderView(0);
+        if (header == null || header.getLayoutParams() == null
+                || header.getLayoutParams().height == desiredHeaderHeight) {
+            return;
+        }
+        header.getLayoutParams().height = desiredHeaderHeight;
+        header.requestLayout();
+    }
+
+    private int countVisibleMenuRows(Menu menu) {
+        if (menu == null) {
+            return 0;
+        }
+        int count = 0;
+        for (int i = 0; i < menu.size(); i++) {
+            MenuItem item = menu.getItem(i);
+            if (item != null && item.isVisible()) {
+                count++;
+            }
+        }
+        return count;
     }
 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 600a798..d684068 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -9,30 +9,52 @@
     android:fitsSystemWindows="true">
 
     <LinearLayout
+        android:id="@+id/main_shell"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:orientation="vertical">
+        android:orientation="horizontal">
 
-        <com.google.android.material.appbar.MaterialToolbar
-            android:id="@+id/toolbar"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:background="@drawable/sbt_toolbar_background"
-            android:elevation="0dp"
-            android:theme="@style/ThemeOverlay.MaterialComponents.Dark.ActionBar"
-            app:navigationIconTint="@color/sbt_on_primary"
-            app:titleTextColor="@android:color/white" />
+        <com.google.android.material.navigation.NavigationView
+            android:id="@+id/nav_view_permanent"
+            android:layout_width="@dimen/sbt_navigation_drawer_width"
+            android:layout_height="match_parent"
+            android:background="@color/sbt_surface"
+            android:fitsSystemWindows="true"
+            android:visibility="gone"
+            app:headerLayout="@layout/drawer_header"
+            app:itemBackground="@drawable/drawer_item_background"
+            app:itemTextColor="@color/drawer_item_text_color"
+            app:menu="@menu/drawer_menu" />
 
-        <FrameLayout
-            android:id="@+id/content_frame"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent" />
+        <LinearLayout
+            android:id="@+id/main_content"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <com.google.android.material.appbar.MaterialToolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@drawable/sbt_toolbar_background"
+                android:elevation="0dp"
+                android:theme="@style/ThemeOverlay.MaterialComponents.Dark.ActionBar"
+                app:navigationIconTint="@color/sbt_on_primary"
+                app:titleTextColor="@android:color/white" />
+
+            <FrameLayout
+                android:id="@+id/content_frame"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+
+        </LinearLayout>
 
     </LinearLayout>
 
     <com.google.android.material.navigation.NavigationView
-        android:id="@+id/nav_view"
-        android:layout_width="wrap_content"
+        android:id="@+id/nav_view_drawer"
+        android:layout_width="@dimen/sbt_navigation_drawer_width"
         android:layout_height="match_parent"
         android:layout_gravity="start"
         android:background="@color/sbt_surface"
diff --git a/app/src/main/res/layout/drawer_header.xml b/app/src/main/res/layout/drawer_header.xml
index 9817584..3ead5fb 100644
--- a/app/src/main/res/layout/drawer_header.xml
+++ b/app/src/main/res/layout/drawer_header.xml
@@ -2,11 +2,11 @@
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="172dp"
+    android:layout_height="@dimen/sbt_drawer_header_height"
     android:background="@drawable/sbt_drawer_header_background"
     android:gravity="bottom"
     android:orientation="vertical"
-    android:padding="20dp">
+    android:padding="@dimen/sbt_drawer_header_padding">
 
     <TextView
         android:layout_width="wrap_content"
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
new file mode 100644
index 0000000..5b9e8f5
--- /dev/null
+++ b/app/src/main/res/values/dimens.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="sbt_navigation_drawer_width">216dp</dimen>
+    <dimen name="sbt_folded_portrait_width">360dp</dimen>
+    <dimen name="sbt_navigation_menu_item_height">48dp</dimen>
+    <dimen name="sbt_drawer_header_height">86dp</dimen>
+    <dimen name="sbt_drawer_header_min_height">86dp</dimen>
+    <dimen name="sbt_drawer_header_max_height">172dp</dimen>
+    <dimen name="sbt_drawer_header_padding">16dp</dimen>
+</resources>