diff --git a/app/src/main/java/devs/org/calculator/activities/MainActivity.kt b/app/src/main/java/devs/org/calculator/activities/MainActivity.kt
index 313fdda..81888f4 100644
--- a/app/src/main/java/devs/org/calculator/activities/MainActivity.kt
+++ b/app/src/main/java/devs/org/calculator/activities/MainActivity.kt
@@ -1,14 +1,11 @@
 package devs.org.calculator.activities
 
-import android.app.Activity
-import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.os.Environment
-import android.provider.Settings
 import android.util.Log
 import android.widget.Toast
 import androidx.activity.result.ActivityResultLauncher
@@ -40,7 +37,6 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        // Initialize ActivityResultLauncher
         launcher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
             handleActivityResult(result)
         }
@@ -57,7 +53,6 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
                 this
             )
         }
-        // Number buttons
         setupNumberButton(binding.btn0, "0")
         setupNumberButton(binding.btn1, "1")
         setupNumberButton(binding.btn2, "2")
@@ -68,14 +63,11 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
         setupNumberButton(binding.btn7, "7")
         setupNumberButton(binding.btn8, "8")
         setupNumberButton(binding.btn9, "9")
-
-        // Operator buttons
         setupOperatorButton(binding.btnPlus, "+")
         setupOperatorButton(binding.btnMinus, "-")
-        setupOperatorButton(binding.btnMultiply, "*")
+        setupOperatorButton(binding.btnMultiply, "×")
         setupOperatorButton(binding.btnDivide, "/")
 
-        // Special buttons
         binding.btnClear.setOnClickListener { clearDisplay() }
         binding.btnDot.setOnClickListener { addDecimal() }
         binding.btnEquals.setOnClickListener { calculateResult() }
@@ -88,8 +80,6 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
             result.data?.data?.let { uri ->
                 baseDocumentTreeUri = uri
                 val takeFlags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
-
-                // Take persistable Uri Permission for future use
                 contentResolver.takePersistableUriPermission(uri, takeFlags)
 
                 val preferences = getSharedPreferences("com.example.fileutility", MODE_PRIVATE)
@@ -115,7 +105,10 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
     private fun setupOperatorButton(button: MaterialButton, operator: String) {
         button.setOnClickListener {
             if (!lastWasOperator) {
-                currentExpression += operator
+                currentExpression += when (operator) {
+                    "×" -> "*"
+                    else -> operator
+                }
                 lastWasOperator = true
                 hasDecimal = false
             }
@@ -123,6 +116,7 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
         }
     }
 
+
     private fun clearDisplay() {
         currentExpression = "0"
         binding.total.text = ""
@@ -150,8 +144,7 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
     }
 
     private fun calculateResult() {
-        // Check for secret code
-        if (currentExpression == "123456") { // Replace with your desired code
+        if (currentExpression == "123456") {
             val intent = Intent(this, SetupPasswordActivity::class.java)
             intent.putExtra("password", currentExpression)
             startActivity(intent)
@@ -159,7 +152,6 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
             return
         }
 
-        // Validate password
         if (PrefsUtil(this).validatePassword(currentExpression)) {
             val intent = Intent(this, HiddenVaultActivity::class.java)
             intent.putExtra("password", currentExpression)
@@ -169,6 +161,7 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
         }
 
         try {
+            currentExpression = currentExpression.replace("×", "*")
             val expression = ExpressionBuilder(currentExpression).build()
             val result = expression.evaluate()
 
@@ -180,25 +173,26 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
 
             lastWasOperator = false
             hasDecimal = currentExpression.contains(".")
+
             updateDisplay()
+            binding.total.text = ""
         } catch (e: Exception) {
             binding.display.text = getString(R.string.invalid_message)
         }
     }
 
-    private fun updateDisplay() {
-        binding.display.text = currentExpression
 
-        if (currentExpression == "0"){
+    private fun updateDisplay() {
+        binding.display.text = currentExpression.replace("*", "×")
+
+        if (currentExpression == "0") {
             binding.total.text = ""
             return
         }
-        // Evaluate the expression and update total
+
         try {
             val expression = ExpressionBuilder(currentExpression).build()
             val result = expression.evaluate()
-
-            // Format the result and update total.text
             val formattedResult = if (result.toLong().toDouble() == result) {
                 result.toLong().toString()
             } else {
@@ -207,11 +201,11 @@ class MainActivity : AppCompatActivity(), DialogActionsCallback {
 
             binding.total.text = formattedResult
         } catch (e: Exception) {
-            // Show a blank or placeholder for invalid expressions
             binding.total.text = ""
         }
     }
 
+
     private fun cutNumbers() {
         if (currentExpression.isNotEmpty()){
             if (currentExpression.length == 1){
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 7440b76..6a554eb 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -15,7 +15,6 @@
         android:layout_margin="16dp"
         android:layout_weight="3"
         android:layout_marginTop="0dp"
-        android:elevation="4dp"
         android:orientation="vertical"
         android:gravity="right|bottom">
         <TextView
@@ -108,10 +107,12 @@
             android:layout_rowWeight="1"
             android:layout_columnWeight="1"
             android:textSize="30sp"
+            android:gravity="center"
             android:layout_margin="4dp"
             app:icon="@drawable/backspace"
+            android:textAlignment="center"
             app:layout_constraintDimensionRatio="1:1"
-            app:iconSize="30dp"
+            app:iconSize="32dp"
             app:cornerRadius="15dp"/>
         <!-- Row 2 -->
         <com.google.android.material.button.MaterialButton
diff --git a/app/src/main/res/values-night/colors.xml b/app/src/main/res/values-night/colors.xml
index f256b6a..0c057b8 100644
--- a/app/src/main/res/values-night/colors.xml
+++ b/app/src/main/res/values-night/colors.xml
@@ -4,17 +4,8 @@
     <color name="white">#FFFFFFFF</color>
 
     <!-- Material You dynamic colors -->
-    <color name="primary">@android:color/system_accent1_600</color>
-    <color name="on_primary">@android:color/system_accent1_0</color>
-    <color name="primary_container">@android:color/system_accent1_100</color>
-    <color name="on_primary_container">@android:color/system_accent1_900</color>
-
-    <color name="secondary">@android:color/system_accent2_600</color>
-    <color name="on_secondary">@android:color/system_accent2_0</color>
-    <color name="secondary_container">@android:color/system_accent2_100</color>
-    <color name="on_secondary_container">@android:color/system_accent2_900</color>
-
-    <color name="surface">@android:color/system_neutral1_50</color>
-    <color name="on_surface">@android:color/system_neutral1_900</color>
+    <color name="primary">#00B43B</color>
+    <color name="colorPrimaryVariant">#00C15C</color>
+    <color name="colorSecondary">#39FF97</color>
     <color name="textColor">#ffffff</color>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-night/themes.xml b/app/src/main/res/values-night/themes.xml
index 66daa58..83ddb31 100644
--- a/app/src/main/res/values-night/themes.xml
+++ b/app/src/main/res/values-night/themes.xml
@@ -2,13 +2,13 @@
     <!-- Base application theme. -->
     <style name="Base.Theme.Calculator" parent="Theme.Material3.DayNight.NoActionBar">
         <!-- Primary brand color -->
-        <item name="colorPrimary">@android:color/system_accent1_200</item>
-        <item name="colorPrimaryVariant">@android:color/system_accent1_300</item>
+        <item name="colorPrimary">@color/primary</item>
+        <item name="colorPrimaryVariant">@color/colorPrimaryVariant</item>
         <item name="colorOnPrimary">@color/black</item>
-        
+        <item name="android:background">@color/black</item>
         <!-- Secondary brand color -->
-        <item name="colorSecondary">@android:color/system_accent2_200</item>
-        <item name="colorSecondaryVariant">@android:color/system_accent2_300</item>
+        <item name="colorSecondary">@color/colorSecondary</item>
+        <item name="colorSecondaryVariant">@color/colorSecondary</item>
         <item name="colorOnSecondary">@color/black</item>
         <item name="fontFamily">@font/ubuntu_regular</item>
         <!-- Status bar color -->
@@ -17,6 +17,6 @@
         
         <!-- Enable window decor fitting -->
         <item name="android:windowLightStatusBar">false</item>
-        <item name="android:windowLightNavigationBar">false</item>
+        <item name="android:windowLightNavigationBar" tools:targetApi="o_mr1">false</item>
     </style>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index b41dde7..8a8302c 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -4,17 +4,8 @@
     <color name="white">#FFFFFFFF</color>
     
     <!-- Material You dynamic colors -->
-    <color name="primary">@android:color/system_accent1_600</color>
-    <color name="on_primary">@android:color/system_accent1_0</color>
-    <color name="primary_container">@android:color/system_accent1_100</color>
-    <color name="on_primary_container">@android:color/system_accent1_900</color>
-    
-    <color name="secondary">@android:color/system_accent2_600</color>
-    <color name="on_secondary">@android:color/system_accent2_0</color>
-    <color name="secondary_container">@android:color/system_accent2_100</color>
-    <color name="on_secondary_container">@android:color/system_accent2_900</color>
-    
-    <color name="surface">@android:color/system_neutral1_50</color>
-    <color name="on_surface">@android:color/system_neutral1_900</color>
+    <color name="primary">#00B43B</color>
+    <color name="colorPrimaryVariant">#00C15C</color>
+    <color name="colorSecondary">#39FF97</color>
     <color name="textColor">#000000</color>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
index 0962bc9..aead0f3 100644
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -2,24 +2,21 @@
     <!-- Base application theme. -->
     <style name="Base.Theme.Calculator" parent="Theme.Material3.DayNight.NoActionBar">
         <!-- Primary brand color -->
-        <item name="colorPrimary">@android:color/system_accent1_600</item>
-        <item name="colorPrimaryVariant">@android:color/system_accent1_700</item>
+        <item name="colorPrimary">@color/primary</item>
+        <item name="colorPrimaryVariant">@color/colorPrimaryVariant</item>
         <item name="colorOnPrimary">@color/white</item>
-        <item name="android:textColor"></item>
-        <item name="fontFamily">@font/ubuntu_regular</item>
-        
         <!-- Secondary brand color -->
-        <item name="colorSecondary">@android:color/system_accent2_600</item>
-        <item name="colorSecondaryVariant">@android:color/system_accent2_700</item>
-        <item name="colorOnSecondary">@color/black</item>
-        
+        <item name="colorSecondary">@color/colorSecondary</item>
+        <item name="colorSecondaryVariant">@color/colorSecondary</item>
+        <item name="colorOnSecondary">@color/white</item>
+        <item name="fontFamily">@font/ubuntu_regular</item>
         <!-- Status bar color -->
         <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:navigationBarColor">@android:color/transparent</item>
-        
+
         <!-- Enable window decor fitting -->
         <item name="android:windowLightStatusBar">true</item>
-        <item name="android:windowLightNavigationBar">true</item>
+        <item name="android:windowLightNavigationBar" tools:targetApi="o_mr1">true</item>
     </style>
 
     <style name="Theme.Calculator" parent="Base.Theme.Calculator" />