Update header.php added styles.css

mymodule/themes/fancytheme/default/includes/header.php

@@ -52,6 +52,7 @@ header('X-Frame-Options: SAMEORIGIN');
 <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css" integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay" crossorigin="anonymous">
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+<link rel="stylesheet" type="text/css"  href="/css/styles.css"/>
 <?php
 
 if (!empty($jquery)) {