Small layout improvement

app/src/main/res/layout/fragment_pro.xml

@@ -55,7 +55,10 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="24dp"
+                android:backgroundTint="?attr/colorPrimary"
                 android:text="@string/title_pro_purchase"
+                android:textColor="@android:color/white"
+                android:textStyle="bold"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/tvList" />