diff --git a/client/src/components/Layout.tsx b/client/src/components/Layout.tsx
index 99b8f49..d4bb526 100644
--- a/client/src/components/Layout.tsx
+++ b/client/src/components/Layout.tsx
@@ -91,10 +91,10 @@ export default function Layout({ children }: LayoutProps) {
         {!isMobile && <Sidebar />}
         
         <main className={`flex-1 flex flex-col overflow-hidden ${
-          isMobile ? 'ml-0' : sidebarCollapsed ? 'ml-16' : 'ml-64'
+          isMobile ? 'ml-0' : sidebarCollapsed ? 'ml-16' : 'ml-72 xl:ml-80'
         }`}>
           {/* Header with store selector for admin */}
-          <header className="h-16 bg-white dark:bg-gray-800 border-b border-gray-200 dark:border-gray-700 flex items-center justify-between px-4 sm:px-6">
+          <header className="h-20 xl:h-24 bg-white dark:bg-gray-800 border-b border-gray-200 dark:border-gray-700 flex items-center justify-between px-6 sm:px-8 xl:px-12">
             <div className="flex items-center gap-4">
               {/* Mobile menu button */}
               {isMobile && (
@@ -107,7 +107,7 @@ export default function Layout({ children }: LayoutProps) {
                   {mobileMenuOpen ? <X className="h-5 w-5" /> : <Menu className="h-5 w-5" />}
                 </Button>
               )}
-              <h1 className="text-lg font-medium text-gray-800 dark:text-gray-200">LogiFlow</h1>
+              <h1 className="text-xl xl:text-2xl font-semibold text-gray-800 dark:text-gray-200">LogiFlow</h1>
             </div>
 
             {/* Store selector for admin - moved to top right */}
@@ -155,7 +155,7 @@ export default function Layout({ children }: LayoutProps) {
                         <div className="flex items-center gap-2">
                           <div 
                             className="w-3 h-3" 
-                            style={{ backgroundColor: store.color }}
+                            style={{ backgroundColor: store.color || '#6B7280' }}
                           />
                           <span>{store.name}</span>
                         </div>
@@ -168,9 +168,11 @@ export default function Layout({ children }: LayoutProps) {
           </header>
 
           {/* Main content area */}
-          <div className="flex-1 overflow-auto bg-gray-50 dark:bg-gray-900 p-4 sm:p-6">
+          <div className="flex-1 bg-gray-50 dark:bg-gray-900 p-6 sm:p-8 xl:p-12 overflow-y-auto">
             <div className="container-responsive">
-              {children}
+              <div className="desktop-spacing">
+                {children}
+              </div>
             </div>
           </div>
         </main>
diff --git a/client/src/components/Sidebar.tsx b/client/src/components/Sidebar.tsx
index adf62f7..53ce0f6 100644
--- a/client/src/components/Sidebar.tsx
+++ b/client/src/components/Sidebar.tsx
@@ -259,13 +259,13 @@ export default function Sidebar() {
   }
 
   return (
-    <aside className={`${isCollapsed ? 'w-16' : 'w-64'} bg-white dark:bg-gray-800 border-r border-gray-200 dark:border-gray-700 flex flex-col shadow-lg transition-all duration-300 ease-in-out`}>
+    <aside className={`${isCollapsed ? 'w-16' : 'w-72 xl:w-80'} bg-white dark:bg-gray-800 border-r border-gray-200 dark:border-gray-700 flex flex-col shadow-xl transition-all duration-300 ease-in-out`}>
       {/* Logo et bouton de collapse */}
-      <div className="h-16 flex items-center justify-between border-b border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 px-3">
+      <div className="h-20 xl:h-24 flex items-center justify-between border-b border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 px-4 xl:px-6">
         {!isCollapsed && (
           <div className="flex items-center space-x-3">
             <Store className="h-6 w-6 text-blue-600 dark:text-blue-400" />
-            <span className="text-lg font-semibold text-gray-900 dark:text-gray-100">LogiFlow</span>
+            <span className="text-xl xl:text-2xl font-bold text-gray-900 dark:text-gray-100">LogiFlow</span>
           </div>
         )}
         {isCollapsed && (
@@ -290,8 +290,8 @@ export default function Sidebar() {
       </div>
 
       {/* Navigation */}
-      <nav className="flex-1 py-4 px-3">
-        <div className="space-y-1">
+      <nav className="flex-1 py-6 xl:py-8 px-4 xl:px-6">
+        <div className="space-y-2 xl:space-y-3">
           {menuItems.map((item) => {
             const hasRolePermission = hasPermission(item.roles);
             // console.log(`🔍 Menu item ${item.path} (${item.label}):`, { 
@@ -374,7 +374,7 @@ export default function Sidebar() {
               </h3>
             </div>
           )}
-          <div className="space-y-1">
+          <div className="space-y-2 xl:space-y-3">
             {adminItems.map((item) => {
               if (!hasPermission(item.roles)) return null;
               
diff --git a/client/src/index.css b/client/src/index.css
index 9696545..3327907 100644
--- a/client/src/index.css
+++ b/client/src/index.css
@@ -126,30 +126,30 @@
     background-color: var(--accent);
   }
 
-  /* Responsive utilities */
+  /* Responsive utilities - Optimisé pour grand écran */
   .container-responsive {
-    @apply w-full mx-auto px-4 sm:px-6 lg:px-8;
-    max-width: 1400px;
+    @apply w-full mx-auto px-4 sm:px-6 lg:px-8 xl:px-12;
+    max-width: none; /* Utilise toute la largeur disponible */
   }
   
   .grid-responsive {
-    @apply grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4;
+    @apply grid grid-cols-1 gap-6 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 2xl:grid-cols-5;
   }
   
   .card-responsive {
-    @apply bg-card border border-border rounded-lg shadow-sm hover:shadow-md transition-shadow p-4 sm:p-6;
+    @apply bg-card border border-border rounded-xl shadow-sm hover:shadow-lg transition-all p-6 sm:p-8;
   }
   
   .text-responsive-sm {
-    @apply text-sm sm:text-base;
+    @apply text-base sm:text-lg lg:text-xl;
   }
   
   .text-responsive-lg {
-    @apply text-lg sm:text-xl lg:text-2xl;
+    @apply text-xl sm:text-2xl lg:text-3xl xl:text-4xl;
   }
   
   .sidebar-width {
-    @apply w-16 lg:w-64;
+    @apply w-16 lg:w-72 xl:w-80;
   }
   
   .sidebar-collapsed {
@@ -157,12 +157,25 @@
   }
   
   .main-content {
-    @apply flex-1 flex flex-col overflow-hidden ml-16 lg:ml-64;
+    @apply flex-1 flex flex-col overflow-hidden ml-16 lg:ml-72 xl:ml-80;
   }
   
   .main-content-expanded {
     @apply ml-16;
   }
+  
+  /* Utilitaires pour grand écran */
+  .desktop-padding {
+    @apply p-8 xl:p-12;
+  }
+  
+  .desktop-text {
+    @apply text-lg xl:text-xl;
+  }
+  
+  .desktop-spacing {
+    @apply space-y-8 xl:space-y-12;
+  }
 }
 
 /* Supprimer le contour orange de la date du jour dans le calendrier */
diff --git a/client/src/pages/Dashboard.tsx b/client/src/pages/Dashboard.tsx
index 9b9dc7a..f56d0ff 100644
--- a/client/src/pages/Dashboard.tsx
+++ b/client/src/pages/Dashboard.tsx
@@ -138,7 +138,7 @@ export default function Dashboard() {
   const deliveredThisMonth = Array.isArray(allDeliveries) ? allDeliveries.filter((delivery: any) => {
     const deliveryDate = safeDate(delivery.deliveredDate || delivery.createdAt);
     const now = new Date();
-    return deliveryDate.getMonth() === now.getMonth() && 
+    return deliveryDate && deliveryDate.getMonth() === now.getMonth() && 
            deliveryDate.getFullYear() === now.getFullYear() && 
            delivery.status === 'delivered';
   }).length : 0;
@@ -148,7 +148,7 @@ export default function Dashboard() {
     if (delivery.status === 'delivered' && delivery.unit === 'palettes') {
       const deliveryDate = safeDate(delivery.deliveredDate || delivery.createdAt);
       const now = new Date();
-      if (deliveryDate.getMonth() === now.getMonth() && deliveryDate.getFullYear() === now.getFullYear()) {
+      if (deliveryDate && deliveryDate.getMonth() === now.getMonth() && deliveryDate.getFullYear() === now.getFullYear()) {
         return total + (delivery.quantity || 0);
       }
     }
@@ -403,7 +403,7 @@ export default function Dashboard() {
               .slice(0, 3)
               .map((publicity: any) => {
                 const participatingStores = publicity.participations || [];
-                const isCurrentStoreParticipating = selectedStoreId && participatingStores.some((p: any) => p.groupId === parseInt(selectedStoreId));
+                const isCurrentStoreParticipating = selectedStoreId && participatingStores.some((p: any) => p.groupId === parseInt(selectedStoreId.toString()));
                 
                 return (
                   <div key={publicity.id} className="p-4 bg-gray-50 hover:bg-gray-100 transition-colors border-l-3 border-purple-500 space-y-2">
@@ -436,7 +436,7 @@ export default function Dashboard() {
                             <Badge 
                               key={participation.groupId} 
                               className={`text-xs ${
-                                selectedStoreId && participation.groupId === parseInt(selectedStoreId)
+                                selectedStoreId && participation.groupId === parseInt(selectedStoreId.toString())
                                   ? 'bg-green-100 text-green-800 border border-green-300'
                                   : 'bg-gray-100 text-gray-700'
                               }`}
diff --git a/client/src/pages/Deliveries.tsx b/client/src/pages/Deliveries.tsx
index c93b786..596e5bf 100644
--- a/client/src/pages/Deliveries.tsx
+++ b/client/src/pages/Deliveries.tsx
@@ -29,6 +29,7 @@ import CreateDeliveryModal from "@/components/modals/CreateDeliveryModal";
 import EditDeliveryModal from "@/components/modals/EditDeliveryModal";
 import OrderDetailModal from "@/components/modals/OrderDetailModal";
 import ConfirmDeleteModal from "@/components/modals/ConfirmDeleteModal";
+import { usePermissions } from "@shared/permissions";
 import type { DeliveryWithRelations } from "@shared/schema";
 
 export default function Deliveries() {
@@ -36,6 +37,7 @@ export default function Deliveries() {
   const { selectedStoreId } = useStore();
   const { toast } = useToast();
   const queryClient = useQueryClient();
+  const permissions = usePermissions(user?.role);
   
   // Redirection pour les employés
   if (user?.role === 'employee') {
@@ -336,11 +338,10 @@ export default function Deliveries() {
             )}
           </div>
         ) : (
-          <div className="flex-1 overflow-y-auto p-6">
-            <div className="bg-white border border-gray-200 shadow-lg overflow-hidden">
-              <div className="overflow-x-auto">
-                <table className="w-full">
-                  <thead className="bg-gray-50 border-b border-gray-200">
+          <div className="bg-white border border-gray-200 shadow-lg overflow-hidden rounded-xl">
+            <div className="overflow-x-auto">
+              <table className="w-full">
+                <thead className="bg-gray-50 border-b border-gray-200">
                     <tr>
                       <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                         Fournisseur
@@ -367,8 +368,8 @@ export default function Deliveries() {
                         Actions
                       </th>
                     </tr>
-                  </thead>
-                  <tbody className="bg-white divide-y divide-gray-200">
+                </thead>
+                <tbody className="bg-white divide-y divide-gray-200">
                     {paginatedDeliveries.map((delivery) => (
                       <tr key={delivery.id} className="hover:bg-gray-50">
                         <td className="px-6 py-4 whitespace-nowrap">
@@ -466,21 +467,20 @@ export default function Deliveries() {
                         </td>
                       </tr>
                     ))}
-                  </tbody>
-                </table>
-              </div>
-              
-              {/* Pagination */}
-              <Pagination
-                currentPage={currentPage}
-                totalPages={totalPages}
-                totalItems={totalItems}
-                itemsPerPage={itemsPerPage}
-                onPageChange={setCurrentPage}
-                onItemsPerPageChange={setItemsPerPage}
-                className="mt-4 p-4 border-t border-gray-200"
-              />
+                </tbody>
+              </table>
             </div>
+            
+            {/* Pagination */}
+            <Pagination
+              currentPage={currentPage}
+              totalPages={totalPages}
+              totalItems={totalItems}
+              itemsPerPage={itemsPerPage}
+              onPageChange={setCurrentPage}
+              onItemsPerPageChange={setItemsPerPage}
+              className="mt-4 p-4 border-t border-gray-200"
+            />
           </div>
         )}
       </div>
diff --git a/client/src/pages/Orders.tsx b/client/src/pages/Orders.tsx
index f4f18d4..9f45a96 100644
--- a/client/src/pages/Orders.tsx
+++ b/client/src/pages/Orders.tsx
@@ -27,6 +27,7 @@ import CreateOrderModal from "@/components/modals/CreateOrderModal";
 import EditOrderModal from "@/components/modals/EditOrderModal";
 import OrderDetailModal from "@/components/modals/OrderDetailModal";
 import ConfirmDeleteModal from "@/components/modals/ConfirmDeleteModal";
+import { usePermissions } from "@shared/permissions";
 import type { OrderWithRelations } from "@shared/schema";
 
 export default function Orders() {
@@ -34,6 +35,7 @@ export default function Orders() {
   const { selectedStoreId } = useStore();
   const { toast } = useToast();
   const queryClient = useQueryClient();
+  const permissions = usePermissions(user?.role);
   
   // Redirection pour les employés
   if (user?.role === 'employee') {
@@ -285,7 +287,7 @@ export default function Orders() {
           <div className="flex items-center justify-center h-64">
             <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-primary"></div>
           </div>
-        ) : (console.log('📦 Filtered orders length:', filteredOrders.length) || filteredOrders.length === 0) ? (
+        ) : filteredOrders.length === 0 ? (
           <div className="flex flex-col items-center justify-center h-64 text-gray-500">
             <Package className="w-16 h-16 mb-4 text-gray-300" />
             <h3 className="text-lg font-medium mb-2">Aucune commande trouvée</h3>
@@ -305,11 +307,10 @@ export default function Orders() {
             )}
           </div>
         ) : (
-          <div className="flex-1 overflow-y-auto p-6">
-            <div className="bg-white border border-gray-200 shadow-lg overflow-hidden">
-              <div className="overflow-x-auto">
-                <table className="w-full">
-                  <thead className="bg-gray-50 border-b border-gray-200">
+          <div className="bg-white border border-gray-200 shadow-lg overflow-hidden rounded-xl">
+            <div className="overflow-x-auto">
+              <table className="w-full">
+                <thead className="bg-gray-50 border-b border-gray-200">
                     <tr>
                       <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                         Fournisseur
@@ -330,8 +331,8 @@ export default function Orders() {
                         Actions
                       </th>
                     </tr>
-                  </thead>
-                  <tbody className="bg-white divide-y divide-gray-200">
+                </thead>
+                <tbody className="bg-white divide-y divide-gray-200">
                     {paginatedOrders.map((order) => (
                       <tr key={order.id} className="hover:bg-gray-50">
                         <td className="px-6 py-4 whitespace-nowrap">
@@ -404,21 +405,20 @@ export default function Orders() {
                         </td>
                       </tr>
                     ))}
-                  </tbody>
-                </table>
-              </div>
-              
-              {/* Pagination */}
-              <Pagination
-                currentPage={currentPage}
-                totalPages={totalPages}
-                totalItems={totalItems}
-                itemsPerPage={itemsPerPage}
-                onPageChange={setCurrentPage}
-                onItemsPerPageChange={setItemsPerPage}
-                className="mt-4 p-4 border-t border-gray-200"
-              />
+                </tbody>
+              </table>
             </div>
+            
+            {/* Pagination */}
+            <Pagination
+              currentPage={currentPage}
+              totalPages={totalPages}
+              totalItems={totalItems}
+              itemsPerPage={itemsPerPage}
+              onPageChange={setCurrentPage}
+              onItemsPerPageChange={setItemsPerPage}
+              className="mt-4 p-4 border-t border-gray-200"
+            />
           </div>
         )}
       </div>