diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 3199ec4..623c010 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -27,6 +27,7 @@ android {
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            signingConfig = signingConfigs.getByName("debug")
         }
     }
     compileOptions {
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 528bb86..8fa2534 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -19,8 +19,8 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/wittrail_logo_back"
         android:supportsRtl="true"
-        android:theme="@style/Theme.WittrailAndroid"
-        tools:targetApi="31">
+        android:theme="@style/Theme.WittrailAndroid.Dark"
+    tools:targetApi="31">
         <service
             android:name="CameraXRecordingService"
             android:foregroundServiceType="camera|microphone"
@@ -31,10 +31,9 @@
             android:name=".MainActivity"
             android:exported="true"
             android:label="@string/app_name"
-            android:theme="@style/Theme.WittrailAndroid">
+            android:theme="@style/Theme.WittrailAndroid.Dark">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
diff --git a/app/src/main/java/com/urkob/wittrail_android/MainActivity.kt b/app/src/main/java/com/urkob/wittrail_android/MainActivity.kt
index 7a2ff56..a9e15ee 100644
--- a/app/src/main/java/com/urkob/wittrail_android/MainActivity.kt
+++ b/app/src/main/java/com/urkob/wittrail_android/MainActivity.kt
@@ -12,6 +12,7 @@ import android.widget.Toast
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.annotation.RequiresApi
 import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
 
@@ -37,6 +38,7 @@ class MainActivity : AppCompatActivity() {
 
     @RequiresApi(Build.VERSION_CODES.O)
     override fun onCreate(savedInstanceState: Bundle?) {
+        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index 4ee6d8f..49955fd 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
+    <!-- Original colors -->
     <color name="purple_200">#FFBB86FC</color>
     <color name="purple_500">#FF6200EE</color>
     <color name="purple_700">#FF3700B3</color>
@@ -8,4 +9,12 @@
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
     <color name="red">#FF0000</color>
-</resources>
\ No newline at end of file
+
+    <!-- Dark theme colors -->
+    <color name="dark_primary">#121212</color>
+    <color name="dark_primary_variant">#1F1B24</color>
+    <color name="dark_accent">#BB86FC</color>
+    <color name="dark_background">#000000</color>
+    <color name="dark_surface">#121212</color>
+    <color name="dark_on_primary">#FFFFFF</color>
+</resources>
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
index b59f6a7..af37fc5 100644
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -1,9 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-
-    <!-- Base application theme. -->
-    <style name="Theme.WittrailAndroid" parent="ThemeOverlay.AppCompat.Dark.ActionBar">
-        <!-- Customize your theme here. -->
+    <!-- Dark theme for your application -->
+    <style name="Theme.WittrailAndroid.Dark" parent="Theme.AppCompat.DayNight.NoActionBar">
+        <!-- Window background -->
+        <item name="android:windowBackground">@color/dark_background</item>
+        <item name="android:colorBackground">@color/dark_background</item>
+        <!-- Primary brand color -->
+        <item name="colorPrimary">@color/red</item>
+        <!-- Primary brand color variant -->
+        <item name="colorPrimaryDark">@color/red</item>
+        <!-- Accent color -->
+        <item name="colorAccent">@color/dark_accent</item>
+        <!-- Surface and onPrimary colors can be used by Material components -->
+        <item name="android:textColorPrimary">@color/red</item>
     </style>
 
+    <!-- Base application theme -->
+    <style name="Theme.WittrailAndroid" parent="Theme.AppCompat.Light.NoActionBar">
+        <!-- Customize your light theme here -->
+    </style>
 </resources>
diff --git a/build.gradle.kts b/build.gradle.kts
index 0fdb4ad..5736bae 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,5 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
     id("com.android.application") version "8.7.3" apply false
-    id("org.jetbrains.kotlin.android") version "1.9.24" apply false
+    id("org.jetbrains.kotlin.android") version "1.9.0" apply false
 }
\ No newline at end of file