diff --git a/agile-dev/css/custom.css b/agile-dev/css/custom.css
index 51d5b8c..6f8d869 100644
--- a/agile-dev/css/custom.css
+++ b/agile-dev/css/custom.css
@@ -1,6 +1,6 @@
 
 /* section 1 */
-header {
+.section1 {
     display: flex;
     align-items: center;
     justify-content: space-between;
diff --git a/agile-dev/index.html b/agile-dev/index.html
index 29a2a5c..6575810 100644
--- a/agile-dev/index.html
+++ b/agile-dev/index.html
@@ -38,7 +38,7 @@
 
     <!--Début section 1-->
       <div>
-        <section>
+        <section class="section1">
           <div class="iphone section1">
             <img src="img/iphone_features_light.png" alt="iphone section1">
           </div>