<!DOCTYPE html>
<html>
<style>
    :root {
        color: blue;
    }
    @media (overflow-block: paged) {
        :root {
            color: green;
        }
    }
    @media (overflow-block: scroll) {
        :root {
            color: red;
        }
    }
    @media (overflow-block: none) {
        :root {
            color: red;
        }
    }
</style>
<p>This text should be green in paginated mode.</p>
<script>
if (window.internals)
    internals.setPagination("LeftToRightPaginated", 0);
</script>
</html>