diff --git a/Bootstrap_new/css/theme-modern.css b/Bootstrap_new/css/theme-modern.css
index 3ae28c30..77940a89 100644
--- a/Bootstrap_new/css/theme-modern.css
+++ b/Bootstrap_new/css/theme-modern.css
@@ -120,76 +120,125 @@ body {
     box-shadow: 0 4px 12px rgba(11, 94, 124, 0.3);
 }
 
-/* 3. Sidebar */
+/* ================================================= */
+/* SIDEBAR - Version corrigée */
+/* ================================================= */
+
 .sidebar {
-    width: var(--sidebar-width);
-    background: white;
-    border-right: 1px solid var(--border-color);
-    padding: 1.5rem 0.5rem;
-    transition: width 0.3s ease;
+    width: 260px;
+    background: linear-gradient(180deg, #1e2b3a 0%, #15232e 100%);
+    color: #fff;
+    position: fixed;
+    left: 0;
+    top: 0;
+    height: 100vh;
+    overflow-y: auto;
+    transition: all 0.3s;
+    z-index: 1000;
+    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
+}
+
+.sidebar-brand {
+    padding: 25px 20px;
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    border-bottom: 1px solid rgba(255,255,255,0.1);
+    margin-bottom: 20px;
+}
+
+.sidebar-brand img {
+    width: 40px;
+    height: 40px;
+}
+
+.sidebar-brand span {
+    font-size: 1.2rem;
+    font-weight: 600;
+    color: white;
+    letter-spacing: 0.5px;
+}
+
+.sidebar-nav {
+    list-style: none;
+    padding: 0 10px;
+    margin: 0;
+}
+
+.sidebar-nav .nav-item {
+    margin-bottom: 5px;
 }
 
 .sidebar-nav .nav-link {
     display: flex;
     align-items: center;
-    gap: 0.75rem;
-    padding: 0.7rem 1rem;
-    color: #4b5563;
-    border-radius: 12px;
-    margin-bottom: 0.2rem;
-    transition: all 0.2s;
-    font-weight: 500;
+    padding: 12px 15px;
+    color: rgba(255,255,255,0.8);
+    text-decoration: none;
+    border-radius: 10px;
+    transition: all 0.3s;
+    gap: 12px;
+    font-size: 0.95rem;
 }
 
-.sidebar-nav .nav-link i:first-child {
-    font-size: 1.3rem;
-    width: 1.75rem;
-    color: var(--primary);
-    transition: all 0.2s;
+.sidebar-nav .nav-link i {
+    width: 24px;
+    font-size: 1.2rem;
+    color: rgba(255,255,255,0.6);
+    transition: all 0.3s;
 }
 
 .sidebar-nav .nav-link:hover {
-    background: var(--primary-light);
-    color: var(--primary);
+    background: rgba(255,255,255,0.1);
+    color: white;
 }
 
-.sidebar-nav .nav-link[aria-expanded="true"] {
-    background: var(--primary-light);
-    color: var(--primary);
+.sidebar-nav .nav-link:hover i {
+    color: white;
+}
+
+.sidebar-nav .nav-link.active {
+    background: #0b5e7c;
+    color: white;
+    box-shadow: 0 4px 10px rgba(11,94,124,0.3);
+}
+
+.sidebar-nav .nav-link.active i {
+    color: white;
 }
 
 /* Sous-menus */
 .nav-content {
-    padding-left: 2.5rem;
     list-style: none;
+    padding-left: 45px;
+    margin: 5px 0 10px 0;
+}
+
+.nav-content li {
+    margin-bottom: 3px;
 }
 
 .nav-content a {
     display: flex;
     align-items: center;
-    gap: 0.5rem;
-    padding: 0.5rem 0;
-    color: #6b7280;
-    font-size: 0.9rem;
+    padding: 8px 15px;
+    color: rgba(255,255,255,0.7);
     text-decoration: none;
-    transition: all 0.2s;
-    border-radius: 10px;
+    border-radius: 8px;
+    font-size: 0.9rem;
+    gap: 8px;
 }
 
 .nav-content a i {
     font-size: 0.5rem;
-    color: #9ca3af;
+    color: rgba(255,255,255,0.5);
 }
 
-.nav-content a:hover,
-.nav-content a.active {
-    color: var(--primary);
-    background: transparent;
+.nav-content a:hover {
+    background: rgba(255,255,255,0.05);
+    color: white;
 }
 
-.nav-content a.active i {
-    color: var(--primary);
-}
 
 /* 4. Main content */
 .main {