<resources>
      <!-- Default screen margins, per the Android Design guidelines. -->
      <dimen name="activity_horizontal_margin">16dp</dimen>
      <dimen name="activity_vertical_margin">16dp</dimen>
      <dimen name="fab_margin">16dp</dimen>
      <dimen name="appbar_padding_top">8dp</dimen>

      <dimen name="text_margin">16dp</dimen>

  </resources>