Flex not work :=((

Problem/Motivation

1. Create theme from starterkit, and create custom view views-view-unformatted--newproduct--page.tpl.php

2. Code in view

<div class="row card-grid">
  <div class="col-xs-12 col-sm-6 col-md-3 card-wrapper">
    <?php foreach ($rows as $id => $row) : ?>
      <div class="card">
        <?php print $row; ?>
      </div>
    <?php endforeach; ?>
  </div>
</div>

3. html and look: like on picture.

Please, help.