diff --git a/_includes/header.html b/_includes/header.html
index c4ebd51..61e00fe 100644
--- a/_includes/header.html
+++ b/_includes/header.html
@@ -1,23 +1,4 @@
 <header class="site-header">
-    <style>
-        header {
-            position: fixed;
-            top: 0;
-            width: 100%;
-            z-index: 1000; /* Ensure it stays above other content */
-            background-color: #fff; /* or any background you prefer */
-            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); /* Optional: adds a shadow to make it stand out */
-            }
-
-        body {
-        padding-top: 60px; /* Adjust according to your header's height */
-        }
-
-        body.dark-mode header {
-        background-color: #333;
-        color: white;
-        }
-    </style>
 
     <div class="wrapper">
       {%- assign default_paths = site.pages | map: "path" -%}
diff --git a/_layouts/default.html b/_layouts/default.html
index adf6b4b..3ed5ebb 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -173,7 +173,23 @@
 
 {%- include header.html -%}
 
+header {
+  position: fixed;
+  top: 0;
+  width: 100%;
+  z-index: 1000; /* Ensure it stays above other content */
+  background-color: #fff; /* or any background you prefer */
+  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); /* Optional: adds a shadow to make it stand out */
+}
 
+body {
+  padding-top: 60px; /* Adjust according to your header's height */
+}
+
+body.dark-mode header {
+  background-color: #333;
+  color: white;
+}
 
 <div class="toc">
   <h2 class="no-toc">Sommaire</h2>