diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index cbff8652cf..5151a618f6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -63,7 +63,7 @@ Supported filename extensions are:
 - ``.bugfix``: Signifying a bug fix.
 - ``.doc``: Signifying a documentation improvement.
 - ``.removal``: Signifying a deprecation or removal of public API. Can be used to notifying about API change in the Matrix SDK
-- ``.misc``: A ticket has been closed, but it is not of interest to users. Note that in this case, the content of the file will not be output, but just the issue/PR number.
+- ``.misc``: Any other changes.
 
 See https://github.com/twisted/towncrier#news-fragments if you need more details.
 
diff --git a/library/ui-styles/src/debug/java/im/vector/lib/ui/styles/debug/DebugMaterialThemeActivity.kt b/library/ui-styles/src/debug/java/im/vector/lib/ui/styles/debug/DebugMaterialThemeActivity.kt
index 675edde4f2..553d495e22 100644
--- a/library/ui-styles/src/debug/java/im/vector/lib/ui/styles/debug/DebugMaterialThemeActivity.kt
+++ b/library/ui-styles/src/debug/java/im/vector/lib/ui/styles/debug/DebugMaterialThemeActivity.kt
@@ -24,6 +24,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
 import im.vector.lib.ui.styles.R
 import im.vector.lib.ui.styles.databinding.ActivityDebugMaterialThemeBinding
+import im.vector.lib.ui.styles.dialogs.MaterialProgressDialog
 
 // Rendering is not the same with VectorBaseActivity
 abstract class DebugMaterialThemeActivity : AppCompatActivity() {
@@ -50,14 +51,20 @@ abstract class DebugMaterialThemeActivity : AppCompatActivity() {
         }
 
         views.debugShowDialog.setOnClickListener {
-            MaterialAlertDialogBuilder(this)
-                    .setTitle("Dialog title")
-                    .setMessage("Dialog content")
-                    .setIcon(R.drawable.ic_debug_icon)
-                    .setPositiveButton("Positive", null)
-                    .setNegativeButton("Negative", null)
-                    .setNeutralButton("Neutral", null)
-                    .show()
+            showTestDialog(0)
+        }
+
+        views.debugShowDialogDestructive.setOnClickListener {
+            showTestDialog(R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
+        }
+
+        views.debugShowDialogNegativeDestructive.setOnClickListener {
+            showTestDialog(R.style.ThemeOverlay_Vector_MaterialAlertDialog_NegativeDestructive)
+        }
+
+        views.debugShowProgressDialog.setOnClickListener {
+            MaterialProgressDialog(this)
+                    .show(message = "Progress Dialog\nLine 2", cancellable = true)
         }
 
         views.debugShowBottomSheet.setOnClickListener {
@@ -65,6 +72,17 @@ abstract class DebugMaterialThemeActivity : AppCompatActivity() {
         }
     }
 
+    private fun showTestDialog(theme: Int) {
+        MaterialAlertDialogBuilder(this, theme)
+                .setTitle("Dialog title")
+                .setMessage("Dialog content\nLine 2")
+                .setIcon(R.drawable.ic_debug_icon)
+                .setPositiveButton("Positive", null)
+                .setNegativeButton("Negative", null)
+                .setNeutralButton("Neutral", null)
+                .show()
+    }
+
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_debug, menu)
         return true
diff --git a/library/ui-styles/src/debug/res/layout/activity_debug_material_theme.xml b/library/ui-styles/src/debug/res/layout/activity_debug_material_theme.xml
index 7df0facb12..4828810e34 100644
--- a/library/ui-styles/src/debug/res/layout/activity_debug_material_theme.xml
+++ b/library/ui-styles/src/debug/res/layout/activity_debug_material_theme.xml
@@ -452,6 +452,27 @@
                     android:layout_gravity="center_horizontal"
                     android:text="Show Dialog" />
 
+                <Button
+                    android:id="@+id/debugShowDialogDestructive"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center_horizontal"
+                    android:text="Show Dialog Destructive" />
+
+                <Button
+                    android:id="@+id/debugShowDialogNegativeDestructive"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center_horizontal"
+                    android:text="Show Dialog Neg Destructive" />
+
+                <Button
+                    android:id="@+id/debugShowProgressDialog"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center_horizontal"
+                    android:text="Show Progress Dialog" />
+
                 <Button
                     android:id="@+id/debugShowBottomSheet"
                     android:layout_width="wrap_content"
diff --git a/library/ui-styles/src/main/java/MaterialProgressDialog.kt b/library/ui-styles/src/main/java/MaterialProgressDialog.kt
new file mode 100644
index 0000000000..9523c5c19c
--- /dev/null
+++ b/library/ui-styles/src/main/java/MaterialProgressDialog.kt
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2021 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.lib.ui.styles.dialogs
+
+import android.content.Context
+import android.view.LayoutInflater
+import androidx.appcompat.app.AlertDialog
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import im.vector.lib.ui.styles.R
+import im.vector.lib.ui.styles.databinding.DialogProgressMaterialBinding
+
+class MaterialProgressDialog(val context: Context) {
+    fun show(message: CharSequence, cancellable: Boolean = false): AlertDialog {
+        val view = LayoutInflater.from(context).inflate(R.layout.dialog_progress_material, null)
+        val views = DialogProgressMaterialBinding.bind(view)
+        views.message.text = message
+
+        return MaterialAlertDialogBuilder(context)
+                .setCancelable(cancellable)
+                .setView(view)
+                .show()
+    }
+}
diff --git a/library/ui-styles/src/main/res/layout/dialog_progress_material.xml b/library/ui-styles/src/main/res/layout/dialog_progress_material.xml
new file mode 100644
index 0000000000..09c88cc50b
--- /dev/null
+++ b/library/ui-styles/src/main/res/layout/dialog_progress_material.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <!-- Inspired from https://android.googlesource.com/platform/frameworks/base/+/master/core/res/res/layout/progress_dialog.xml -->
+    <LinearLayout
+        android:id="@+id/body"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:baselineAligned="false"
+        android:orientation="horizontal"
+        android:paddingStart="8dp"
+        android:paddingTop="10dp"
+        android:paddingEnd="8dp"
+        android:paddingBottom="10dp">
+
+        <ProgressBar
+            android:id="@android:id/progress"
+            style="?android:attr/progressBarStyle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="12dp"
+            android:max="10000" />
+
+        <TextView
+            android:id="@+id/message"
+            style="@style/Widget.Vector.TextView.Body"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            tools:text="Content\nLine 2" />
+
+    </LinearLayout>
+
+</FrameLayout>
\ No newline at end of file
diff --git a/library/ui-styles/src/main/res/values/dimens_font.xml b/library/ui-styles/src/main/res/values/dimens_font.xml
new file mode 100644
index 0000000000..92df8dbf35
--- /dev/null
+++ b/library/ui-styles/src/main/res/values/dimens_font.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <dimen name="text_size_title">24sp</dimen>
+    <dimen name="text_size_headline">18sp</dimen>
+    <dimen name="text_size_subtitle">16sp</dimen>
+    <dimen name="text_size_body">14sp</dimen>
+    <dimen name="text_size_caption">12sp</dimen>
+    <dimen name="text_size_micro">10sp</dimen>
+
+    <dimen name="text_size_button">16sp</dimen>
+
+</resources>
\ No newline at end of file
diff --git a/library/ui-styles/src/main/res/values/styles_alert_dialog.xml b/library/ui-styles/src/main/res/values/styles_alert_dialog.xml
index 283a1ab1ca..69abc85c39 100644
--- a/library/ui-styles/src/main/res/values/styles_alert_dialog.xml
+++ b/library/ui-styles/src/main/res/values/styles_alert_dialog.xml
@@ -1,28 +1,40 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <style name="AlertDialog.Vector.Light" parent="ThemeOverlay.MaterialComponents.MaterialAlertDialog">
-        <item name="colorPrimary">@color/palette_element_green</item>
-        <item name="colorSecondary">@color/palette_element_green</item>
-        <item name="colorSurface">@color/element_system_light</item>
-        <item name="colorOnSurface">@color/element_content_primary_light</item>
-        <item name="colorError">@color/element_alert_light</item>
-        <!--item name="alertDialogStyle">@style/MaterialAlertDialog.App</item>
-        <item name="materialAlertDialogTitleTextStyle">@style/MaterialAlertDialog.App.Title.Text</item>
-        <item name="buttonBarPositiveButtonStyle">@style/Widget.App.Button</item>
-        <item name="buttonBarNeutralButtonStyle">@style/Widget.App.Button</item-->
+    <style name="ThemeOverlay.Vector.MaterialAlertDialog" parent="ThemeOverlay.MaterialComponents.MaterialAlertDialog">
+        <item name="materialAlertDialogTitleTextStyle">@style/MaterialAlertDialog.Vector.Title.Text</item>
+        <item name="materialAlertDialogBodyTextStyle">@style/MaterialAlertDialog.Vector.Body.Text</item>
+        <item name="buttonBarPositiveButtonStyle">@style/Widget.Vector.Button.TextButton.Dialog</item>
+        <item name="buttonBarNegativeButtonStyle">@style/Widget.Vector.Button.TextButton.Dialog</item>
+        <item name="buttonBarNeutralButtonStyle">@style/Widget.Vector.Button.TextButton.Dialog</item>
     </style>
 
-    <style name="AlertDialog.Vector.Dark" parent="ThemeOverlay.MaterialComponents.MaterialAlertDialog">
-        <item name="colorPrimary">@color/palette_element_green</item>
-        <item name="colorSecondary">@color/palette_element_green</item>
-        <item name="colorSurface">@color/element_system_dark</item>
-        <item name="colorOnSurface">@color/element_content_primary_dark</item>
-        <item name="colorError">@color/element_alert_dark</item>
-        <!--item name="alertDialogStyle">@style/MaterialAlertDialog.App</item>
-        <item name="materialAlertDialogTitleTextStyle">@style/MaterialAlertDialog.App.Title.Text</item>
-        <item name="buttonBarPositiveButtonStyle">@style/Widget.App.Button</item>
-        <item name="buttonBarNeutralButtonStyle">@style/Widget.App.Button</item-->
+    <style name="ThemeOverlay.Vector.MaterialAlertDialog.Destructive">
+        <item name="buttonBarPositiveButtonStyle">@style/Widget.Vector.Button.TextButton.Dialog.Destructive</item>
+    </style>
+
+    <style name="ThemeOverlay.Vector.MaterialAlertDialog.NegativeDestructive">
+        <item name="buttonBarNegativeButtonStyle">@style/Widget.Vector.Button.TextButton.Dialog.Destructive</item>
+    </style>
+
+    <!-- Title -->
+    <style name="MaterialAlertDialog.Vector.Title.Text" parent="MaterialAlertDialog.MaterialComponents.Title.Text">
+        <item name="android:textAppearance">@style/TextAppearance.Vector.Subtitle</item>
+    </style>
+
+    <!-- Body -->
+    <style name="MaterialAlertDialog.Vector.Body.Text" parent="MaterialAlertDialog.MaterialComponents.Body.Text">
+        <item name="android:textAppearance">@style/TextAppearance.Vector.Body</item>
+        <item name="lineHeight">20sp</item>
+    </style>
+
+    <!-- Buttons -->
+    <style name="Widget.Vector.Button.TextButton.Dialog" parent="Widget.MaterialComponents.Button.TextButton.Dialog">
+        <item name="android:textAppearance">@style/TextAppearance.Vector.Button</item>
+    </style>
+
+    <style name="Widget.Vector.Button.TextButton.Dialog.Destructive">
+        <item name="materialThemeOverlay">@style/VectorMaterialThemeOverlayDestructive</item>
     </style>
 
 </resources>
\ No newline at end of file
diff --git a/library/ui-styles/src/main/res/values/text_appearances.xml b/library/ui-styles/src/main/res/values/text_appearances.xml
index 88192f70e6..4ad3fd493e 100644
--- a/library/ui-styles/src/main/res/values/text_appearances.xml
+++ b/library/ui-styles/src/main/res/values/text_appearances.xml
@@ -14,7 +14,7 @@
     <style name="TextAppearance.Vector.Title" parent="TextAppearance.MaterialComponents.Headline3">
         <item name="fontFamily">sans-serif</item>
         <item name="android:fontFamily">sans-serif</item>
-        <item name="android:textSize">24sp</item>
+        <item name="android:textSize">@dimen/text_size_title</item>
         <item name="android:letterSpacing">0</item>
         <item name="android:textColor">?vctr_content_primary</item>
     </style>
@@ -27,7 +27,7 @@
     <style name="TextAppearance.Vector.Headline.Medium" parent="TextAppearance.MaterialComponents.Headline1">
         <item name="fontFamily">sans-serif-medium</item>
         <item name="android:fontFamily">sans-serif-medium</item>
-        <item name="android:textSize">18sp</item>
+        <item name="android:textSize">@dimen/text_size_headline</item>
         <item name="android:letterSpacing">0</item>
         <item name="android:textColor">?vctr_content_primary</item>
     </style>
@@ -35,7 +35,7 @@
     <style name="TextAppearance.Vector.Subtitle" parent="TextAppearance.MaterialComponents.Subtitle1">
         <item name="fontFamily">sans-serif</item>
         <item name="android:fontFamily">sans-serif</item>
-        <item name="android:textSize">16sp</item>
+        <item name="android:textSize">@dimen/text_size_subtitle</item>
         <item name="android:letterSpacing">0</item>
         <item name="android:textColor">?vctr_content_secondary</item>
     </style>
@@ -49,7 +49,7 @@
     <style name="TextAppearance.Vector.Body" parent="TextAppearance.MaterialComponents.Body1">
         <item name="fontFamily">sans-serif</item>
         <item name="android:fontFamily">sans-serif</item>
-        <item name="android:textSize">14sp</item>
+        <item name="android:textSize">@dimen/text_size_body</item>
         <item name="android:letterSpacing">0</item>
         <item name="android:textColor">?vctr_content_primary</item>
     </style>
@@ -62,7 +62,7 @@
     <style name="TextAppearance.Vector.Caption" parent="TextAppearance.MaterialComponents.Caption">
         <item name="fontFamily">sans-serif</item>
         <item name="android:fontFamily">sans-serif</item>
-        <item name="android:textSize">12sp</item>
+        <item name="android:textSize">@dimen/text_size_caption</item>
         <item name="android:letterSpacing">0</item>
         <item name="android:textColor">?vctr_content_secondary</item>
     </style>
@@ -70,14 +70,14 @@
     <style name="TextAppearance.Vector.Micro" parent="TextAppearance.MaterialComponents.Caption">
         <item name="fontFamily">sans-serif</item>
         <item name="android:fontFamily">sans-serif</item>
-        <item name="android:textSize">10sp</item>
+        <item name="android:textSize">@dimen/text_size_micro</item>
         <item name="android:letterSpacing">0</item>
     </style>
 
     <style name="TextAppearance.Vector.Button" parent="TextAppearance.MaterialComponents.Button">
         <item name="fontFamily">sans-serif-medium</item>
         <item name="android:fontFamily">sans-serif-medium</item>
-        <item name="android:textSize">16sp</item>
+        <item name="android:textSize">@dimen/text_size_button</item>
         <item name="android:letterSpacing">0.02</item>
     </style>
 
diff --git a/library/ui-styles/src/main/res/values/theme_dark.xml b/library/ui-styles/src/main/res/values/theme_dark.xml
index b9965439ff..8fffb9f05f 100644
--- a/library/ui-styles/src/main/res/values/theme_dark.xml
+++ b/library/ui-styles/src/main/res/values/theme_dark.xml
@@ -76,7 +76,6 @@
         <item name="android:textViewStyle">@style/Widget.Vector.TextView.Body</item>
         <item name="materialButtonStyle">@style/Widget.Vector.Button</item>
         <item name="toolbarStyle">@style/Widget.Vector.Toolbar</item>
-        <item name="materialAlertDialogTheme">@style/AlertDialog.Vector.Dark</item>
         <item name="bottomNavigationStyle">@style/BottomNavigation.Vector</item>
         <item name="searchViewStyle">@style/Widget.Vector.SearchView</item>
         <item name="textInputStyle">@style/Widget.Vector.TextInputLayout</item>
@@ -89,6 +88,7 @@
 
         <!-- Default theme -->
         <item name="bottomSheetDialogTheme">@style/Theme.Vector.BottomSheetDialog.Dark</item>
+        <item name="materialAlertDialogTheme">@style/ThemeOverlay.Vector.MaterialAlertDialog</item>
 
         <item name="android:textColorLink">@color/element_link_dark</item>
 
diff --git a/library/ui-styles/src/main/res/values/theme_light.xml b/library/ui-styles/src/main/res/values/theme_light.xml
index 531f590b6c..41786ca030 100644
--- a/library/ui-styles/src/main/res/values/theme_light.xml
+++ b/library/ui-styles/src/main/res/values/theme_light.xml
@@ -76,7 +76,6 @@
         <item name="android:textViewStyle">@style/Widget.Vector.TextView.Body</item>
         <item name="materialButtonStyle">@style/Widget.Vector.Button</item>
         <item name="toolbarStyle">@style/Widget.Vector.Toolbar</item>
-        <item name="materialAlertDialogTheme">@style/AlertDialog.Vector.Light</item>
         <item name="bottomNavigationStyle">@style/BottomNavigation.Vector</item>
         <item name="searchViewStyle">@style/Widget.Vector.SearchView</item>
         <item name="textInputStyle">@style/Widget.Vector.TextInputLayout</item>
@@ -89,6 +88,7 @@
 
         <!-- Default theme -->
         <item name="bottomSheetDialogTheme">@style/Theme.Vector.BottomSheetDialog.Light</item>
+        <item name="materialAlertDialogTheme">@style/ThemeOverlay.Vector.MaterialAlertDialog</item>
 
         <item name="android:textColorLink">@color/element_link_light</item>
 
diff --git a/vector/src/debug/res/layout/activity_debug_menu.xml b/vector/src/debug/res/layout/activity_debug_menu.xml
index 60cfc1e826..a83f61266a 100644
--- a/vector/src/debug/res/layout/activity_debug_menu.xml
+++ b/vector/src/debug/res/layout/activity_debug_menu.xml
@@ -114,6 +114,12 @@
                     android:text="Vector" />
             </LinearLayout>
 
+            <Button
+                android:id="@+id/debug_open_button_styles_dark"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="See button dark" />
+
             <Button
                 android:id="@+id/debug_test_text_view_dark"
                 android:layout_width="wrap_content"
@@ -122,12 +128,6 @@
                 android:layout_weight="1"
                 android:text="Text Views Dark" />
 
-            <Button
-                android:id="@+id/debug_open_button_styles_dark"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="See button dark" />
-
             <Button
                 android:id="@+id/debug_show_sas_emoji"
                 android:layout_width="wrap_content"
diff --git a/vector/src/main/java/im/vector/app/core/dialogs/Extensions.kt b/vector/src/main/java/im/vector/app/core/dialogs/Extensions.kt
deleted file mode 100644
index 56544f929e..0000000000
--- a/vector/src/main/java/im/vector/app/core/dialogs/Extensions.kt
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2019 New Vector Ltd
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package im.vector.app.core.dialogs
-
-import androidx.annotation.AttrRes
-import androidx.appcompat.app.AlertDialog
-import im.vector.app.R
-import im.vector.app.features.themes.ThemeUtils
-
-fun AlertDialog.withColoredButton(whichButton: Int, @AttrRes color: Int = R.attr.colorError): AlertDialog {
-    getButton(whichButton)?.setTextColor(ThemeUtils.getColor(context, color))
-    return this
-}
diff --git a/vector/src/main/java/im/vector/app/core/platform/VectorBaseFragment.kt b/vector/src/main/java/im/vector/app/core/platform/VectorBaseFragment.kt
index c513007c3d..2c9452c4fd 100644
--- a/vector/src/main/java/im/vector/app/core/platform/VectorBaseFragment.kt
+++ b/vector/src/main/java/im/vector/app/core/platform/VectorBaseFragment.kt
@@ -14,11 +14,8 @@
  * limitations under the License.
  */
 
-@file:Suppress("DEPRECATION")
-
 package im.vector.app.core.platform
 
-import android.app.ProgressDialog
 import android.content.Context
 import android.os.Bundle
 import android.os.Parcelable
@@ -29,11 +26,12 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.annotation.CallSuper
 import androidx.annotation.MainThread
-import com.google.android.material.appbar.MaterialToolbar
+import androidx.appcompat.app.AlertDialog
 import androidx.lifecycle.ViewModelProvider
 import androidx.viewbinding.ViewBinding
 import com.airbnb.mvrx.BaseMvRxFragment
 import com.bumptech.glide.util.Util.assertMainThread
+import com.google.android.material.appbar.MaterialToolbar
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.jakewharton.rxbinding3.view.clicks
 import im.vector.app.R
@@ -44,14 +42,14 @@ import im.vector.app.core.dialogs.UnrecognizedCertificateDialog
 import im.vector.app.core.error.ErrorFormatter
 import im.vector.app.core.extensions.toMvRxBundle
 import im.vector.app.features.navigation.Navigator
+import im.vector.lib.ui.styles.dialogs.MaterialProgressDialog
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import io.reactivex.disposables.Disposable
-
 import timber.log.Timber
 import java.util.concurrent.TimeUnit
 
-abstract class VectorBaseFragment<VB: ViewBinding> : BaseMvRxFragment(), HasScreenInjector {
+abstract class VectorBaseFragment<VB : ViewBinding> : BaseMvRxFragment(), HasScreenInjector {
 
     protected val vectorBaseActivity: VectorBaseActivity<*> by lazy {
         activity as VectorBaseActivity<*>
@@ -67,7 +65,7 @@ abstract class VectorBaseFragment<VB: ViewBinding> : BaseMvRxFragment(), HasScre
     protected lateinit var errorFormatter: ErrorFormatter
     protected lateinit var unrecognizedCertificateDialog: UnrecognizedCertificateDialog
 
-    private var progress: ProgressDialog? = null
+    private var progress: AlertDialog? = null
 
     /* ==========================================================================================
      * View model
@@ -203,14 +201,10 @@ abstract class VectorBaseFragment<VB: ViewBinding> : BaseMvRxFragment(), HasScre
         vectorBaseActivity.getCoordinatorLayout()?.showOptimizedSnackbar(errorFormatter.toHumanReadable(throwable))
     }
 
-    protected fun showLoadingDialog(message: CharSequence? = null, cancelable: Boolean = false) {
+    protected fun showLoadingDialog(message: CharSequence? = null) {
         progress?.dismiss()
-        progress = ProgressDialog(requireContext()).apply {
-            setCancelable(cancelable)
-            setMessage(message ?: getString(R.string.please_wait))
-            setProgressStyle(ProgressDialog.STYLE_SPINNER)
-            show()
-        }
+        progress = MaterialProgressDialog(requireContext())
+                .show(message ?: getString(R.string.please_wait))
     }
 
     protected fun dismissLoadingDialog() {
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
index 024ce9e6d5..e1e5efa58c 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt
@@ -18,7 +18,6 @@ package im.vector.app.features.home.room.detail
 
 import android.annotation.SuppressLint
 import android.app.Activity
-import android.content.DialogInterface
 import android.content.Intent
 import android.content.res.Configuration
 import android.graphics.Color
@@ -75,7 +74,6 @@ import com.vanniktech.emoji.EmojiPopup
 import im.vector.app.R
 import im.vector.app.core.dialogs.ConfirmationDialogBuilder
 import im.vector.app.core.dialogs.GalleryOrCameraDialogHelper
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.epoxy.LayoutManagerStateRestorer
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.exhaustive
@@ -1410,7 +1408,7 @@ class RoomDetailFragment @Inject constructor(
             is RoomDetailAction.ReportContent             -> {
                 when {
                     data.spam          -> {
-                        MaterialAlertDialogBuilder(requireActivity())
+                        MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_NegativeDestructive)
                                 .setTitle(R.string.content_reported_as_spam_title)
                                 .setMessage(R.string.content_reported_as_spam_content)
                                 .setPositiveButton(R.string.ok, null)
@@ -1418,10 +1416,9 @@ class RoomDetailFragment @Inject constructor(
                                     roomDetailViewModel.handle(RoomDetailAction.IgnoreUser(data.senderId))
                                 }
                                 .show()
-                                .withColoredButton(DialogInterface.BUTTON_NEGATIVE)
                     }
                     data.inappropriate -> {
-                        MaterialAlertDialogBuilder(requireActivity())
+                        MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_NegativeDestructive)
                                 .setTitle(R.string.content_reported_as_inappropriate_title)
                                 .setMessage(R.string.content_reported_as_inappropriate_content)
                                 .setPositiveButton(R.string.ok, null)
@@ -1429,10 +1426,9 @@ class RoomDetailFragment @Inject constructor(
                                     roomDetailViewModel.handle(RoomDetailAction.IgnoreUser(data.senderId))
                                 }
                                 .show()
-                                .withColoredButton(DialogInterface.BUTTON_NEGATIVE)
                     }
                     else               -> {
-                        MaterialAlertDialogBuilder(requireActivity())
+                        MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_NegativeDestructive)
                                 .setTitle(R.string.content_reported_title)
                                 .setMessage(R.string.content_reported_content)
                                 .setPositiveButton(R.string.ok, null)
@@ -1440,7 +1436,6 @@ class RoomDetailFragment @Inject constructor(
                                     roomDetailViewModel.handle(RoomDetailAction.IgnoreUser(data.senderId))
                                 }
                                 .show()
-                                .withColoredButton(DialogInterface.BUTTON_NEGATIVE)
                     }
                 }
             }
@@ -1502,7 +1497,7 @@ class RoomDetailFragment @Inject constructor(
                 .subscribe { managed ->
                     if (!managed) {
                         if (title.isValidUrl() && url.isValidUrl() && URL(title).host != URL(url).host) {
-                            MaterialAlertDialogBuilder(requireActivity())
+                            MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_NegativeDestructive)
                                     .setTitle(R.string.external_link_confirmation_title)
                                     .setMessage(
                                             getString(R.string.external_link_confirmation_message, title, url)
@@ -1515,7 +1510,6 @@ class RoomDetailFragment @Inject constructor(
                                     }
                                     .setNegativeButton(R.string.cancel, null)
                                     .show()
-                                    .withColoredButton(DialogInterface.BUTTON_NEGATIVE)
                         } else {
                             // Open in external browser, in a new Tab
                             openUrlInExternalBrowser(requireContext(), url)
@@ -1867,7 +1861,7 @@ class RoomDetailFragment @Inject constructor(
     }
 
     private fun askConfirmationToIgnoreUser(senderId: String) {
-        MaterialAlertDialogBuilder(requireContext())
+        MaterialAlertDialogBuilder(requireContext(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                 .setTitle(R.string.room_participants_action_ignore_title)
                 .setMessage(R.string.room_participants_action_ignore_prompt_msg)
                 .setNegativeButton(R.string.cancel, null)
@@ -1875,7 +1869,6 @@ class RoomDetailFragment @Inject constructor(
                     roomDetailViewModel.handle(RoomDetailAction.IgnoreUser(senderId))
                 }
                 .show()
-                .withColoredButton(DialogInterface.BUTTON_POSITIVE)
     }
 
     /**
diff --git a/vector/src/main/java/im/vector/app/features/home/room/list/RoomListFragment.kt b/vector/src/main/java/im/vector/app/features/home/room/list/RoomListFragment.kt
index 02c89c09dc..3c08793fa4 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/list/RoomListFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/list/RoomListFragment.kt
@@ -16,7 +16,6 @@
 
 package im.vector.app.features.home.room.list
 
-import android.content.DialogInterface
 import android.os.Bundle
 import android.os.Parcelable
 import android.view.LayoutInflater
@@ -34,7 +33,6 @@ import com.airbnb.mvrx.fragmentViewModel
 import com.airbnb.mvrx.withState
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.epoxy.LayoutManagerStateRestorer
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.exhaustive
@@ -386,7 +384,7 @@ class RoomListFragment @Inject constructor(
                 append(getString(R.string.room_participants_leave_private_warning))
             }
         }
-        MaterialAlertDialogBuilder(requireContext())
+        MaterialAlertDialogBuilder(requireContext(), if (isPublicRoom) 0 else R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                 .setTitle(R.string.room_participants_leave_prompt_title)
                 .setMessage(message)
                 .setPositiveButton(R.string.leave) { _, _ ->
@@ -394,11 +392,6 @@ class RoomListFragment @Inject constructor(
                 }
                 .setNegativeButton(R.string.cancel, null)
                 .show()
-                .apply {
-                    if (!isPublicRoom) {
-                        withColoredButton(DialogInterface.BUTTON_POSITIVE)
-                    }
-                }
     }
 
     override fun invalidate() = withState(roomListViewModel) { state ->
diff --git a/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileFragment.kt b/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileFragment.kt
index f9324ad3e2..9ebca6164a 100644
--- a/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/roomprofile/RoomProfileFragment.kt
@@ -17,7 +17,6 @@
 
 package im.vector.app.features.roomprofile
 
-import android.content.DialogInterface
 import android.os.Bundle
 import android.os.Parcelable
 import android.view.LayoutInflater
@@ -33,7 +32,6 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
 import im.vector.app.core.animations.AppBarStateChangeListener
 import im.vector.app.core.animations.MatrixItemAppBarStateChangeListener
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.extensions.copyOnLongClick
@@ -268,7 +266,7 @@ class RoomProfileFragment @Inject constructor(
                 append(getString(R.string.room_participants_leave_private_warning))
             }
         }
-        MaterialAlertDialogBuilder(requireContext())
+        MaterialAlertDialogBuilder(requireContext(), if (isPublicRoom) 0 else R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                 .setTitle(R.string.room_participants_leave_prompt_title)
                 .setMessage(message)
                 .setPositiveButton(R.string.leave) { _, _ ->
@@ -276,11 +274,6 @@ class RoomProfileFragment @Inject constructor(
                 }
                 .setNegativeButton(R.string.cancel, null)
                 .show()
-                .apply {
-                    if (!isPublicRoom) {
-                        withColoredButton(DialogInterface.BUTTON_POSITIVE)
-                    }
-                }
     }
 
     override fun onRoomAliasesClicked() {
diff --git a/vector/src/main/java/im/vector/app/features/roomprofile/alias/RoomAliasFragment.kt b/vector/src/main/java/im/vector/app/features/roomprofile/alias/RoomAliasFragment.kt
index b790e0fccf..3f429737f2 100644
--- a/vector/src/main/java/im/vector/app/features/roomprofile/alias/RoomAliasFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/roomprofile/alias/RoomAliasFragment.kt
@@ -16,7 +16,6 @@
 
 package im.vector.app.features.roomprofile.alias
 
-import android.content.DialogInterface
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -27,7 +26,6 @@ import com.airbnb.mvrx.fragmentViewModel
 import com.airbnb.mvrx.withState
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.extensions.exhaustive
@@ -133,7 +131,7 @@ class RoomAliasFragment @Inject constructor(
     }
 
     private fun unpublishAlias(alias: String) {
-        MaterialAlertDialogBuilder(requireContext())
+        MaterialAlertDialogBuilder(requireContext(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                 .setTitle(R.string.dialog_title_confirmation)
                 .setMessage(getString(R.string.room_alias_unpublish_confirmation, alias))
                 .setNegativeButton(R.string.cancel, null)
@@ -141,7 +139,6 @@ class RoomAliasFragment @Inject constructor(
                     viewModel.handle(RoomAliasAction.UnpublishAlias(alias))
                 }
                 .show()
-                .withColoredButton(DialogInterface.BUTTON_POSITIVE)
     }
 
     override fun toggleManualPublishForm() {
@@ -185,7 +182,7 @@ class RoomAliasFragment @Inject constructor(
     }
 
     private fun removeLocalAlias(alias: String) {
-        MaterialAlertDialogBuilder(requireContext())
+        MaterialAlertDialogBuilder(requireContext(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                 .setTitle(R.string.dialog_title_confirmation)
                 .setMessage(getString(R.string.room_alias_delete_confirmation, alias))
                 .setNegativeButton(R.string.cancel, null)
@@ -193,6 +190,5 @@ class RoomAliasFragment @Inject constructor(
                     viewModel.handle(RoomAliasAction.RemoveLocalAlias(alias))
                 }
                 .show()
-                .withColoredButton(DialogInterface.BUTTON_POSITIVE)
     }
 }
diff --git a/vector/src/main/java/im/vector/app/features/settings/devtools/AccountDataFragment.kt b/vector/src/main/java/im/vector/app/features/settings/devtools/AccountDataFragment.kt
index 49d1789d64..a55032e44a 100644
--- a/vector/src/main/java/im/vector/app/features/settings/devtools/AccountDataFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/devtools/AccountDataFragment.kt
@@ -16,7 +16,6 @@
 
 package im.vector.app.features.settings.devtools
 
-import android.content.DialogInterface
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -26,7 +25,6 @@ import com.airbnb.mvrx.fragmentViewModel
 import com.airbnb.mvrx.withState
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.platform.VectorBaseFragment
@@ -85,7 +83,7 @@ class AccountDataFragment @Inject constructor(
     }
 
     override fun didLongTap(data: UserAccountDataEvent) {
-        MaterialAlertDialogBuilder(requireActivity())
+        MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                 .setTitle(R.string.delete)
                 .setMessage(getString(R.string.delete_account_data_warning, data.type))
                 .setNegativeButton(R.string.cancel, null)
@@ -93,6 +91,5 @@ class AccountDataFragment @Inject constructor(
                     viewModel.handle(AccountDataAction.DeleteAccountData(data.type))
                 }
                 .show()
-                .withColoredButton(DialogInterface.BUTTON_POSITIVE)
     }
 }
diff --git a/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsFragment.kt b/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsFragment.kt
index 0625eece78..384348b85d 100644
--- a/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsFragment.kt
@@ -17,7 +17,6 @@
 package im.vector.app.features.settings.threepids
 
 import android.app.Activity
-import android.content.DialogInterface
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -27,7 +26,6 @@ import com.airbnb.mvrx.fragmentViewModel
 import com.airbnb.mvrx.withState
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.extensions.exhaustive
@@ -186,14 +184,13 @@ class ThreePidsSettingsFragment @Inject constructor(
     }
 
     override fun deleteThreePid(threePid: ThreePid) {
-        MaterialAlertDialogBuilder(requireActivity())
+        MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                 .setMessage(getString(R.string.settings_remove_three_pid_confirmation_content, threePid.getFormattedValue()))
                 .setPositiveButton(R.string.remove) { _, _ ->
                     viewModel.handle(ThreePidsSettingsAction.DeleteThreePid(threePid))
                 }
                 .setNegativeButton(R.string.cancel, null)
                 .show()
-                .withColoredButton(DialogInterface.BUTTON_POSITIVE)
     }
 
     override fun onBackPressed(toolbarButton: Boolean): Boolean {
diff --git a/vector/src/main/java/im/vector/app/features/signout/soft/SoftLogoutFragment.kt b/vector/src/main/java/im/vector/app/features/signout/soft/SoftLogoutFragment.kt
index cc7379085b..48cf7b12bc 100644
--- a/vector/src/main/java/im/vector/app/features/signout/soft/SoftLogoutFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/signout/soft/SoftLogoutFragment.kt
@@ -16,7 +16,6 @@
 
 package im.vector.app.features.signout.soft
 
-import android.content.DialogInterface
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -25,7 +24,6 @@ import com.airbnb.mvrx.activityViewModel
 import com.airbnb.mvrx.withState
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.extensions.hideKeyboard
@@ -127,7 +125,7 @@ class SoftLogoutFragment @Inject constructor(
                 R.string.soft_logout_clear_data_dialog_content
             }
 
-            MaterialAlertDialogBuilder(requireActivity())
+            MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                     .setTitle(R.string.soft_logout_clear_data_dialog_title)
                     .setMessage(messageResId)
                     .setNegativeButton(R.string.cancel, null)
@@ -135,7 +133,6 @@ class SoftLogoutFragment @Inject constructor(
                         softLogoutViewModel.handle(SoftLogoutAction.ClearData)
                     }
                     .show()
-                    .withColoredButton(DialogInterface.BUTTON_POSITIVE)
         }
     }
 
diff --git a/vector/src/main/java/im/vector/app/features/spaces/SpaceSettingsMenuBottomSheet.kt b/vector/src/main/java/im/vector/app/features/spaces/SpaceSettingsMenuBottomSheet.kt
index c74dbaedbe..37c5088123 100644
--- a/vector/src/main/java/im/vector/app/features/spaces/SpaceSettingsMenuBottomSheet.kt
+++ b/vector/src/main/java/im/vector/app/features/spaces/SpaceSettingsMenuBottomSheet.kt
@@ -16,7 +16,6 @@
 
 package im.vector.app.features.spaces
 
-import android.content.DialogInterface
 import android.os.Bundle
 import android.os.Parcelable
 import android.view.LayoutInflater
@@ -28,7 +27,6 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.di.ScreenComponent
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.extensions.setTextOrHide
 import im.vector.app.core.platform.VectorBaseBottomSheetDialogFragment
 import im.vector.app.core.resources.ColorProvider
@@ -174,7 +172,7 @@ class SpaceSettingsMenuBottomSheet : VectorBaseBottomSheetDialogFragment<BottomS
                 null
             }
 
-            MaterialAlertDialogBuilder(requireContext())
+            MaterialAlertDialogBuilder(requireContext(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                     .setMessage(warningMessage)
                     .setTitle(getString(R.string.space_leave_prompt_msg))
                     .setPositiveButton(R.string.leave) { _, _ ->
@@ -189,7 +187,6 @@ class SpaceSettingsMenuBottomSheet : VectorBaseBottomSheetDialogFragment<BottomS
                     }
                     .setNegativeButton(R.string.cancel, null)
                     .show()
-                    .withColoredButton(DialogInterface.BUTTON_POSITIVE)
         }
     }
 
diff --git a/vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryFragment.kt b/vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryFragment.kt
index 0d5e64d3d7..323d8a7c87 100644
--- a/vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryFragment.kt
+++ b/vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryFragment.kt
@@ -16,7 +16,6 @@
 
 package im.vector.app.features.spaces.explore
 
-import android.content.DialogInterface
 import android.os.Bundle
 import android.os.Parcelable
 import android.view.LayoutInflater
@@ -30,7 +29,6 @@ import com.airbnb.mvrx.activityViewModel
 import com.airbnb.mvrx.withState
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
-import im.vector.app.core.dialogs.withColoredButton
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.extensions.registerStartForActivityResult
@@ -180,7 +178,7 @@ class SpaceDirectoryFragment @Inject constructor(
                 .subscribe { managed ->
                     if (!managed) {
                         if (title.isValidUrl() && url.isValidUrl() && URL(title).host != URL(url).host) {
-                            MaterialAlertDialogBuilder(requireActivity())
+                            MaterialAlertDialogBuilder(requireActivity(), R.style.ThemeOverlay_Vector_MaterialAlertDialog_Destructive)
                                     .setTitle(R.string.external_link_confirmation_title)
                                     .setMessage(
                                             getString(R.string.external_link_confirmation_message, title, url)
@@ -193,7 +191,6 @@ class SpaceDirectoryFragment @Inject constructor(
                                     }
                                     .setNegativeButton(R.string.cancel, null)
                                     .show()
-                                    .withColoredButton(DialogInterface.BUTTON_NEGATIVE)
                         } else {
                             // Open in external browser, in a new Tab
                             openUrlInExternalBrowser(requireContext(), url)