Follow theme's cornerRadius for preview cards

    <style name="PreviewCard" parent="CardView.Light">

        <item name="cardCornerRadius">@dimen/preview_card_corner_radius</item>

        <item name="cardCornerRadius">?android:dialogCornerRadius</item>

        <item name="android:clipChildren">true</item>

        <item name="contentPadding">@dimen/preview_card_padding</item>

        <item name="android:background">@color/primary_color</item>

    </style>

    <style name="FullContentPreviewCard" parent="PreviewCard">

        <item name="cardCornerRadius">@dimen/preview_card_corner_radius</item>

        <item name="android:clipChildren">true</item>

        <item name="contentPadding">0dp</item>

        <item name="android:background">@color/primary_color</item>