diff --git a/app/src/main/res/values-v21/dimens.xml b/app/src/main/res/values-v21/dimens.xml
new file mode 100644
index 00000000..f7fa1624
--- /dev/null
+++ b/app/src/main/res/values-v21/dimens.xml
@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="preview_btn_margin">64dp</dimen>
+</resources>
diff --git a/app/src/main/res/values-v21/styles.xml b/app/src/main/res/values-v21/styles.xml
new file mode 100644
index 00000000..2451207e
--- /dev/null
+++ b/app/src/main/res/values-v21/styles.xml
@@ -0,0 +1,7 @@
+<resources>
+
+    <style name="AppTheme" parent="AppTheme.Base">
+        <item name="android:windowTranslucentNavigation">true</item>
+    </style>
+
+</resources>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index c62b5531..d773a90a 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -1,6 +1,8 @@
 <resources>
 
-    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
+    <style name="AppTheme" parent="AppTheme.Base"/>
+
+    <style name="AppTheme.Base" parent="Theme.AppCompat.Light.NoActionBar">
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>