diff --git a/css/styles.css b/css/styles.css
index 4601e34..6397ce9 100644
--- a/css/styles.css
+++ b/css/styles.css
@@ -41,6 +41,7 @@ body {
     background-color: var(--main-bg);
     display: flex;
     flex-direction: column;
+    overflow-x: hidden;
 }
 
 .container {
@@ -110,6 +111,8 @@ img {
     width: calc(100% - 250px);
     padding: 0 20px 20px 20px;
     position: relative;
+    box-sizing: border-box;
+    overflow-x: hidden;
 }
 
 /* Logo */
@@ -154,6 +157,8 @@ img {
     cursor: pointer;
     transition: background-color 0.3s ease;
     margin-right: 10px;
+    flex-shrink: 0;
+    white-space: nowrap;
 }
 
 .install-pwa-button:hover {
@@ -317,12 +322,13 @@ img {
     top: 0;
     z-index: 50;
     box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
-    width: calc(100vw - 250px);
+    width: 100%;
+    max-width: calc(100vw - 250px);
     margin-bottom: 20px;
     margin-left: -20px;
     padding-left: 40px;
     padding-right: 40px;
-    right: 0;
+    box-sizing: border-box;
 }
 
 .search-container {
@@ -391,6 +397,7 @@ img {
 .social-icons, .action-icons {
     display: flex;
     align-items: center;
+    flex-shrink: 0;
 }
 
 .icon-button {
@@ -1550,10 +1557,12 @@ img {
     
     /* Ajuster le header pour le mode sidebar compact */
     .header {
-        width: calc(100vw - 70px);
+        width: 100%;
+        max-width: calc(100vw - 70px);
         margin-left: -20px;
         padding-left: 40px;
         padding-right: 40px;
+        box-sizing: border-box;
     }
     
     .nav-item span {
@@ -1615,10 +1624,12 @@ img {
     
     /* Ajuster le header pour l'affichage mobile */
     .header {
-        width: 100vw;
+        width: 100%;
+        max-width: 100vw;
         margin-left: -20px;
         padding-left: 35px;
         padding-right: 40px;
+        box-sizing: border-box;
     }
     
     .mobile-menu-toggle {