diff --git a/include/header.php b/include/header.php
index 3a35add..ac8e737 100644
--- a/include/header.php
+++ b/include/header.php
@@ -3,10 +3,11 @@
 <head>
     <meta charset="UTF-8">
     <title>Smart House</title>
-    <style>
-        body { font-family: Arial, sans-serif; margin: 20px; }
-        nav a { margin-right: 10px; }
-        hr { margin: 10px 0; }
-    </style>
+
+    <!-- CSS principal -->
+    <link rel="stylesheet" href="style.css">
+
+    <!-- Chart.js pour les graphiques -->
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
 </head>
 <body>
\ No newline at end of file
