diff --git a/app/src/main/res/layout/activity_exam.xml b/app/src/main/res/layout/activity_exam.xml
index 6a09b1f..ac89971 100644
--- a/app/src/main/res/layout/activity_exam.xml
+++ b/app/src/main/res/layout/activity_exam.xml
@@ -29,18 +29,18 @@
 
     <TextView
         android:id="@+id/text_progress"
-        style="@style/TextAppearance.AppCompat.Medium"
+        style="@style/TextAppearance.Exam.QuestionIndicator"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignParentTop="true"
         tools:text="Domanda 35 di 70"/>
 
-    <ProgressBar
+    <com.google.android.material.progressindicator.ProgressIndicator
         android:id="@+id/progress_exam"
         android:layout_width="match_parent"
         android:layout_height="6dp"
         android:layout_below="@+id/text_progress"
-        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+        style="@style/Widget.MaterialComponents.ProgressIndicator.Linear.Determinate"
         tools:progress="50"/>
 
     <FrameLayout
diff --git a/app/src/main/res/layout/activity_game_choice.xml b/app/src/main/res/layout/activity_game_choice.xml
index 86448f0..e53977d 100644
--- a/app/src/main/res/layout/activity_game_choice.xml
+++ b/app/src/main/res/layout/activity_game_choice.xml
@@ -35,7 +35,7 @@
         android:gravity="center_horizontal"
         android:padding="10dp"
         android:text="@string/main_title"
-        android:textAppearance="@style/TextAppearance.AppCompat.Display3" />
+        android:textAppearance="@style/TextAppearance.MaterialComponents.Headline3" />
 
     <TextView
         android:id="@+id/subtitle"
@@ -45,7 +45,7 @@
         android:layout_marginBottom="10dp"
         android:padding="4dp"
         tools:text="@string/specialty0"
-        android:textAppearance="@style/TextAppearance.AppCompat.Headline" />
+        android:textAppearance="@style/TextAppearance.MaterialComponents.Headline5" />
 
     <Button
         android:id="@+id/button_exam"
@@ -56,7 +56,7 @@
 
     <TextView
         android:id="@+id/text_info_exam"
-        style="@style/TextAppearance.AppCompat.Body1"
+        style="@style/TextAppearance.MaterialComponents.Body1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
@@ -75,7 +75,7 @@
         android:text="@string/game_choice_subject" />
 
     <TextView
-        style="@style/TextAppearance.AppCompat.Body1"
+        style="@style/TextAppearance.MaterialComponents.Body1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
@@ -94,7 +94,7 @@
         android:text="@string/game_choice_quickie" />
 
     <TextView
-        style="@style/TextAppearance.AppCompat.Body1"
+        style="@style/TextAppearance.MaterialComponents.Body1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
diff --git a/app/src/main/res/layout/activity_icao_alphabet.xml b/app/src/main/res/layout/activity_icao_alphabet.xml
index c2738dd..9a1c7d9 100644
--- a/app/src/main/res/layout/activity_icao_alphabet.xml
+++ b/app/src/main/res/layout/activity_icao_alphabet.xml
@@ -26,7 +26,7 @@
     tools:context=".ui.IcaoAlphabetActivity">
 
     <TextView
-        style="@style/TextAppearance.AppCompat.Large"
+        style="@style/TextAppearance.MaterialComponents.Headline5"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginBottom="10dp"
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 7181da8..fc7ff78 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -34,7 +34,7 @@
         android:gravity="center_horizontal"
         android:padding="10dp"
         android:text="@string/main_title"
-        android:textAppearance="@style/TextAppearance.AppCompat.Display3" />
+        android:textAppearance="@style/TextAppearance.MaterialComponents.Headline3" />
 
     <TextView
         android:id="@+id/subtitle"
@@ -45,7 +45,7 @@
         android:layout_below="@+id/title"
         android:padding="4dp"
         android:text="@string/main_subtitle"
-        android:textAppearance="@style/TextAppearance.AppCompat.Headline" />
+        android:textAppearance="@style/TextAppearance.MaterialComponents.Headline5" />
 
     <Button
         android:id="@+id/button1"
@@ -106,7 +106,7 @@
 
     <TextView
         android:id="@+id/text_version"
-        style="@style/TextAppearance.AppCompat.Medium"
+        style="@style/TextAppearance.MaterialComponents.Subtitle1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
diff --git a/app/src/main/res/layout/activity_quickie.xml b/app/src/main/res/layout/activity_quickie.xml
index 856ce85..9319183 100644
--- a/app/src/main/res/layout/activity_quickie.xml
+++ b/app/src/main/res/layout/activity_quickie.xml
@@ -29,18 +29,18 @@
 
     <TextView
         android:id="@+id/text_progress"
-        style="@style/TextAppearance.AppCompat.Medium"
+        style="@style/TextAppearance.Exam.QuestionIndicator"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignParentTop="true"
         tools:text="Domanda 35 di 687"/>
 
-    <ProgressBar
+    <com.google.android.material.progressindicator.ProgressIndicator
         android:id="@+id/progress_exam"
         android:layout_width="match_parent"
         android:layout_height="6dp"
         android:layout_below="@+id/text_progress"
-        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+        style="@style/Widget.MaterialComponents.ProgressIndicator.Linear.Determinate"
         tools:progress="50"/>
 
     <FrameLayout
@@ -63,6 +63,7 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
+                android:layout_marginEnd="4dp"
             android:text="@string/button_previous"/>
 
         <Button
@@ -70,7 +71,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="@string/button_next" />
+            android:layout_marginStart="4dp"
+            android:text="@string/button_next"/>
 
     </LinearLayout>
 
diff --git a/app/src/main/res/layout/fragment_question.xml b/app/src/main/res/layout/fragment_question.xml
index 70f80e4..27508a5 100644
--- a/app/src/main/res/layout/fragment_question.xml
+++ b/app/src/main/res/layout/fragment_question.xml
@@ -26,7 +26,7 @@
 
     <TextView
         android:id="@+id/text_subject"
-        style="@style/TextAppearance.AppCompat.Medium"
+        style="@style/TextAppearance.Exam.QuestionIndicator"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginBottom="4dp"
@@ -44,7 +44,7 @@
 
             <TextView
                 android:id="@+id/text_question"
-                style="@style/TextAppearance.AppCompat.Large"
+                style="@style/TextAppearance.Exam.QuestionText"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 tools:text="Per un ultraleggero monomotore, il gruppo motoelica, oltre a formare la trazione, determina effetti secondari?" />
@@ -71,7 +71,7 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="@dimen/question_answers_margin"
-                    android:textAppearance="@style/TextAppearance.AppCompat"
+                    android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
                     android:visibility="gone"
                     tools:visibility="visible"
                     tools:text="sì, la direzione ed entità della forza prodotta, rispetto alla cellula e alle superfici stabilizzatrici e di governo, nonché  la coppia di reazione dell'elica, determinano variazioni di assetto"/>
@@ -82,7 +82,7 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="@dimen/question_answers_margin"
-                    android:textAppearance="@style/TextAppearance.AppCompat"
+                    android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
                     android:visibility="gone"
                     tools:visibility="visible"
                     tools:text="serve principalmente per aumentare la portanza dell'ala"/>
@@ -93,7 +93,7 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="@dimen/question_answers_margin"
-                    android:textAppearance="@style/TextAppearance.AppCompat"
+                    android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
                     android:visibility="gone"
                     tools:visibility="visible"
                     tools:text="serve come zavorra per equilibrare la distribuzione dei pesi"/>
@@ -104,7 +104,7 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="@dimen/question_answers_margin"
-                    android:textAppearance="@style/TextAppearance.AppCompat"
+                    android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
                     android:visibility="gone"
                     tools:visibility="visible"
                     tools:text="non ha alcuna influenza sull'assetto dell'ultraleggero"/>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 3a4c701..950e569 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -28,7 +28,7 @@
 
     <style name="MainActivity" />
 
-    <style name="MainActivity.Button" parent="Widget.AppCompat.Button">
+    <style name="MainActivity.Button" parent="Widget.MaterialComponents.Button">
         <item name="android:textSize">18sp</item>
     </style>
 
@@ -43,7 +43,7 @@
 
     <style name="TextAppearance"/>
 
-    <style name="TextAppearance.Badge" parent="TextAppearance.AppCompat.Display1">
+    <style name="TextAppearance.Badge" parent="TextAppearance.MaterialComponents.Headline4">
         <item name="android:paddingLeft">8dp</item>
         <item name="android:paddingRight">8dp</item>
     </style>
@@ -63,4 +63,13 @@
         <item name="android:textColor">@android:color/white</item>
     </style>
 
+    <style name="TextAppearance.Exam.QuestionIndicator" parent="TextAppearance.MaterialComponents.Subtitle1">
+        <item name="android:textColor">?android:attr/textColorSecondary</item>
+        <item name="android:textSize">18sp</item>
+    </style>
+
+    <style name="TextAppearance.Exam.QuestionText" parent="TextAppearance.MaterialComponents.Body1">
+        <item name="android:textSize">22sp</item>
+    </style>
+
 </resources>