title: Add CSS Module Prestashop 1.7
body: <p>I want to add CSS for my custom module.</p>
  
  <p>mymodule.php</p>
  
  <pre><code>public function hookDisplayHeader()
  {
            $this-&gt;context-&gt;controller-&gt;addCSS($this-&gt;_path . 'views/css/mymodule.css', 'all');//path of css
  }
  </code></pre>
  
  <p>This code dont' work !</p>
  
  <p>Thanks for your help</p>