diff --git a/public/index.html b/public/index.html
index 2c9ccc7..b4c8df3 100644
--- a/public/index.html
+++ b/public/index.html
@@ -9,7 +9,7 @@
 
         :root {
             /* Colors */
-            --bg-gradient: linear-gradient(to bottom right, #ffffff, #f8fafc);
+            --bg-gradient: linear-gradient(to bottom right, #f8fafc, #f1f5f9);
             --primary: #0ea5e9;
             --primary-light: #e0f2fe;
             --primary-dark: #0369a1;
@@ -42,87 +42,98 @@
             -webkit-font-smoothing: antialiased;
         }
 
+        /* Top Navigation */
+        .top-nav {
+            background: var(--surface);
+            border-bottom: 1px solid var(--border);
+            padding: 0.75rem 1.5rem;
+            position: fixed;
+            top: 0;
+            left: 0;
+            right: 0;
+            z-index: 50;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            box-shadow: var(--shadow-sm);
+        }
+
+        .nav-brand {
+            font-size: 1.25rem;
+            font-weight: 600;
+            color: var(--text);
+            text-decoration: none;
+            display: flex;
+            align-items: center;
+            gap: 0.5rem;
+        }
+
+        .nav-brand svg {
+            width: 24px;
+            height: 24px;
+            color: var(--primary);
+        }
+
+        .user-menu {
+            display: flex;
+            align-items: center;
+            gap: 1rem;
+        }
+
+        .user-info {
+            display: flex;
+            align-items: center;
+            gap: 0.5rem;
+            padding: 0.5rem 1rem;
+            background: var(--primary-light);
+            border-radius: 8px;
+            color: var(--primary-dark);
+            font-weight: 500;
+        }
+
+        .user-info svg {
+            width: 18px;
+            height: 18px;
+        }
+
         /* Layout */
         .app {
             display: grid;
             grid-template-columns: 320px 1fr;
             gap: 1rem;
             height: 100vh;
-            padding: 1rem;
+            padding-top: 4rem; /* Space for top nav */
         }
 
         /* Sidebar */
         .sidebar {
             background: var(--surface);
-            border-radius: 24px;
+            border-radius: 16px;
             padding: 1.5rem;
             display: flex;
             flex-direction: column;
             gap: 1.5rem;
             box-shadow: var(--shadow);
-            height: calc(100vh - 2rem);
-            position: relative;
-            overflow: hidden;
-        }
-
-        .sidebar::before {
-            content: '';
-            position: absolute;
-            top: 0;
-            left: 0;
-            right: 0;
-            height: 80px;
-            background: linear-gradient(to bottom, var(--surface) 60%, transparent);
-            z-index: 2;
-            pointer-events: none;
-        }
-
-        .sidebar::after {
-            content: '';
-            position: absolute;
-            bottom: 0;
-            left: 0;
-            right: 0;
-            height: 80px;
-            background: linear-gradient(to top, var(--surface) 60%, transparent);
-            z-index: 2;
-            pointer-events: none;
+            height: calc(100vh - 5rem);
+            margin: 0.5rem;
+            border: 1px solid var(--border);
         }
 
         /* Main Content */
         .main-content {
             background: var(--surface);
-            border-radius: 24px;
+            border-radius: 16px;
             padding: 2rem;
             box-shadow: var(--shadow);
-            height: calc(100vh - 2rem);
+            height: calc(100vh - 5rem);
+            margin: 0.5rem;
+            border: 1px solid var(--border);
             overflow-y: auto;
-            position: relative;
-        }
-
-        /* Header */
-        .header {
-            display: flex;
-            justify-content: space-between;
-            align-items: center;
-            margin-bottom: 2rem;
-            position: relative;
-            z-index: 3;
-        }
-
-        .app-title {
-            font-size: 1.5rem;
-            font-weight: 600;
-            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
-            -webkit-background-clip: text;
-            -webkit-text-fill-color: transparent;
-            position: relative;
         }
 
         /* Search */
         .search-container {
             position: relative;
-            z-index: 3;
         }
 
         .search-input {
@@ -131,7 +142,7 @@
             border: 1px solid var(--border);
             border-radius: 12px;
             font-size: 0.9375rem;
-            background: #f8fafc;
+            background: var(--bg-gradient);
             transition: all 0.2s ease;
         }
 
@@ -142,47 +153,28 @@
             background: var(--surface);
         }
 
-        .search-icon {
-            position: absolute;
-            left: 1rem;
-            top: 50%;
-            transform: translateY(-50%);
-            color: var(--text-light);
-            pointer-events: none;
-            transition: all 0.2s ease;
-        }
-
-        .search-input:focus + .search-icon {
-            color: var(--primary);
-        }
-
         /* Notes List */
         .notes-list {
-            margin-top: 1rem;
             display: flex;
             flex-direction: column;
             gap: 0.75rem;
-            padding: 0.5rem;
             overflow-y: auto;
-            max-height: calc(100% - 140px);
-            position: relative;
-            z-index: 1;
+            padding: 0.5rem;
         }
 
         .note-item {
             padding: 1rem;
-            background: #f8fafc;
+            background: var(--bg-gradient);
+            border: 1px solid var(--border);
             border-radius: 12px;
             cursor: pointer;
             transition: all 0.2s ease;
-            border: 1px solid transparent;
         }
 
         .note-item:hover {
             transform: translateY(-2px);
-            background: var(--surface);
-            border-color: var(--border);
-            box-shadow: var(--shadow-sm);
+            border-color: var(--primary);
+            box-shadow: var(--shadow);
         }
 
         .note-item.active {
@@ -190,58 +182,85 @@
             border-color: var(--primary);
         }
 
-        .note-title {
-            font-weight: 600;
-            color: var(--text);
-            margin-bottom: 0.25rem;
-        }
-
-        .note-preview {
-            font-size: 0.875rem;
-            color: var(--text-light);
-            display: -webkit-box;
-            -webkit-line-clamp: 2;
-            -webkit-box-orient: vertical;
-            overflow: hidden;
-        }
-
         /* Editor */
         .editor {
             background: var(--surface);
-            border-radius: 16px;
-            height: 100%;
+            border-radius: 12px;
+            border: 1px solid var(--border);
+            box-shadow: var(--shadow);
         }
 
         .editor-title {
             width: 100%;
-            padding: 1rem;
+            padding: 1.5rem;
             font-size: 1.5rem;
             font-weight: 600;
             border: none;
             border-bottom: 1px solid var(--border);
             background: transparent;
-            transition: all 0.2s ease;
-        }
-
-        .editor-title:focus {
-            outline: none;
-            border-color: var(--primary);
         }
 
         .editor-content {
-            padding: 1rem;
+            padding: 1.5rem;
             min-height: 300px;
-            outline: none;
+        }
+
+        /* Admin Panel */
+        .admin-panel {
+            position: fixed;
+            inset: 0;
+            background: rgba(0, 0, 0, 0.5);
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            z-index: 100;
+        }
+
+        .admin-content {
+            background: var(--surface);
+            border-radius: 16px;
+            padding: 2rem;
+            width: 600px;
+            max-width: 90vw;
+            max-height: 90vh;
+            overflow-y: auto;
+            box-shadow: var(--shadow-lg);
+            border: 1px solid var(--border);
+        }
+
+        .admin-header {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            margin-bottom: 2rem;
+            padding-bottom: 1rem;
+            border-bottom: 1px solid var(--border);
+        }
+
+        .user-list {
+            display: flex;
+            flex-direction: column;
+            gap: 1rem;
+        }
+
+        .user-card {
+            background: var(--bg-gradient);
+            border: 1px solid var(--border);
+            border-radius: 12px;
+            padding: 1rem;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
         }
 
         /* Buttons */
         .btn {
             padding: 0.75rem 1.5rem;
-            border-radius: 12px;
+            border-radius: 8px;
             font-weight: 500;
             font-size: 0.9375rem;
             transition: all 0.2s ease;
-            border: none;
+            border: 1px solid transparent;
             cursor: pointer;
             display: inline-flex;
             align-items: center;
@@ -251,151 +270,39 @@
         .btn-primary {
             background: var(--primary);
             color: white;
+            border-color: var(--primary-dark);
         }
 
         .btn-primary:hover {
             background: var(--primary-dark);
             transform: translateY(-1px);
-            box-shadow: var(--shadow-sm);
+            box-shadow: var(--shadow);
+        }
+
+        .btn-secondary {
+            background: var(--surface);
+            color: var(--text);
+            border-color: var(--border);
+        }
+
+        .btn-secondary:hover {
+            background: var(--bg-gradient);
+            border-color: var(--primary);
         }
 
         .btn-icon {
             padding: 0.5rem;
-            border-radius: 10px;
+            border-radius: 8px;
             color: var(--text-light);
-            background: transparent;
+            border: 1px solid var(--border);
+            background: var(--surface);
             transition: all 0.2s ease;
         }
 
         .btn-icon:hover {
             background: var(--primary-light);
             color: var(--primary);
-            transform: translateY(-1px);
-        }
-
-        /* Todo Items */
-        .todo-item {
-            display: flex;
-            align-items: center;
-            padding: 0.75rem;
-            background: #f8fafc;
-            border-radius: 10px;
-            margin-bottom: 0.5rem;
-            transition: all 0.2s ease;
-        }
-
-        .todo-item:hover {
-            background: var(--surface);
-            box-shadow: var(--shadow-sm);
-        }
-
-        .todo-checkbox {
-            appearance: none;
-            width: 20px;
-            height: 20px;
-            border: 2px solid var(--border);
-            border-radius: 6px;
-            margin-right: 0.75rem;
-            cursor: pointer;
-            transition: all 0.2s ease;
-            position: relative;
-        }
-
-        .todo-checkbox:checked {
-            background: var(--success);
-            border-color: var(--success);
-        }
-
-        .todo-checkbox:checked::after {
-            content: '✓';
-            position: absolute;
-            color: white;
-            font-size: 12px;
-            top: 50%;
-            left: 50%;
-            transform: translate(-50%, -50%);
-        }
-
-        .todo-text {
-            flex: 1;
-            transition: all 0.2s ease;
-        }
-
-        .todo-item.completed .todo-text {
-            color: var(--text-light);
-            text-decoration: line-through;
-        }
-
-        /* Images Grid */
-        .images-grid {
-            display: grid;
-            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
-            gap: 1rem;
-            padding: 1rem;
-        }
-
-        .image-item {
-            position: relative;
-            border-radius: 12px;
-            overflow: hidden;
-            aspect-ratio: 1;
-            transition: all 0.2s ease;
-        }
-
-        .image-item:hover {
-            transform: scale(1.05);
-            box-shadow: var(--shadow);
-        }
-
-        .image-item img {
-            width: 100%;
-            height: 100%;
-            object-fit: cover;
-        }
-
-        .image-delete {
-            position: absolute;
-            top: 0.5rem;
-            right: 0.5rem;
-            padding: 0.25rem;
-            background: rgba(0, 0, 0, 0.5);
-            border-radius: 6px;
-            color: white;
-            opacity: 0;
-            transition: all 0.2s ease;
-        }
-
-        .image-item:hover .image-delete {
-            opacity: 1;
-        }
-
-        /* Scrollbar */
-        ::-webkit-scrollbar {
-            width: 8px;
-            height: 8px;
-        }
-
-        ::-webkit-scrollbar-track {
-            background: transparent;
-        }
-
-        ::-webkit-scrollbar-thumb {
-            background: var(--border);
-            border-radius: 4px;
-        }
-
-        ::-webkit-scrollbar-thumb:hover {
-            background: var(--text-light);
-        }
-
-        /* Animations */
-        @keyframes fadeIn {
-            from { opacity: 0; transform: translateY(10px); }
-            to { opacity: 1; transform: translateY(0); }
-        }
-
-        .fade-in {
-            animation: fadeIn 0.3s ease forwards;
+            border-color: var(--primary);
         }
 
         /* Responsive */
@@ -409,32 +316,59 @@
             }
 
             .main-content {
-                margin-left: 0;
+                margin: 0.5rem;
             }
         }
     </style>
 </head>
 <body>
+    <!-- Top Navigation -->
+    <nav class="top-nav">
+        <a href="/" class="nav-brand">
+            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                <path d="M12 2L2 7l10 5 10-5-10-5zM2 17l10 5 10-5M2 12l10 5 10-5"></path>
+            </svg>
+            Notes App
+        </a>
+        <div class="user-menu">
+            <div class="user-info">
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"></path>
+                    <circle cx="12" cy="7" r="4"></circle>
+                </svg>
+                <span id="user-info">Utilisateur</span>
+            </div>
+            <button class="btn btn-secondary admin-btn" id="admin-btn">
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <path d="M12 2a10 10 0 0 0-7.743 16.33l-1.964 1.963A12 12 0 1 1 14.243 3.71L12 6"></path>
+                    <path d="M12 8v4l3 3"></path>
+                </svg>
+                Admin
+            </button>
+            <button class="btn btn-secondary" id="logout-btn">
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"></path>
+                    <polyline points="16 17 21 12 16 7"></polyline>
+                    <line x1="21" y1="12" x2="9" y2="12"></line>
+                </svg>
+                Déconnexion
+            </button>
+        </div>
+    </nav>
+
+    <!-- Main App -->
     <div class="app">
         <aside class="sidebar">
-            <div class="header">
-                <h1 class="app-title">Notes</h1>
-                <button class="btn-icon" id="new-note-btn">
-                    <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-                        <line x1="12" y1="5" x2="12" y2="19"></line>
-                        <line x1="5" y1="12" x2="19" y2="12"></line>
-                    </svg>
-                </button>
-            </div>
-
             <div class="search-container">
-                <input type="text" class="search-input" placeholder="Rechercher...">
-                <svg class="search-icon" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-                    <circle cx="11" cy="11" r="8"></circle>
-                    <line x1="21" y1="21" x2="16.65" y2="16.65"></line>
-                </svg>
+                <input type="text" class="search-input" placeholder="Rechercher une note...">
             </div>
-
+            <button class="btn btn-primary" id="new-note-btn">
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <line x1="12" y1="5" x2="12" y2="19"></line>
+                    <line x1="5" y1="12" x2="19" y2="12"></line>
+                </svg>
+                Nouvelle Note
+            </button>
             <div class="notes-list" id="notes-list">
                 <!-- Notes will be dynamically inserted here -->
             </div>
@@ -444,42 +378,37 @@
             <div class="editor">
                 <input type="text" class="editor-title" placeholder="Titre de la note" id="note-title">
                 <div class="editor-content" contenteditable="true" id="note-content"></div>
-
-                <div class="todos-section">
-                    <div class="header">
-                        <h2>Tâches</h2>
-                        <button class="btn-icon" id="add-todo-btn">
-                            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-                                <line x1="12" y1="5" x2="12" y2="19"></line>
-                                <line x1="5" y1="12" x2="19" y2="12"></line>
-                            </svg>
-                        </button>
-                    </div>
-                    <div id="todos-list">
-                        <!-- Todos will be dynamically inserted here -->
-                    </div>
-                </div>
-
-                <div class="images-section">
-                    <div class="header">
-                        <h2>Images</h2>
-                        <label class="btn-icon" for="image-upload">
-                            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-                                <rect x="3" y="3" width="18" height="18" rx="2" ry="2"></rect>
-                                <circle cx="8.5" cy="8.5" r="1.5"></circle>
-                                <polyline points="21 15 16 10 5 21"></polyline>
-                            </svg>
-                        </label>
-                        <input type="file" id="image-upload" hidden accept="image/*">
-                    </div>
-                    <div class="images-grid" id="images-list">
-                        <!-- Images will be dynamically inserted here -->
-                    </div>
-                </div>
             </div>
         </main>
     </div>
 
+    <!-- Admin Panel -->
+    <div id="admin-panel" class="admin-panel hidden">
+        <div class="admin-content">
+            <div class="admin-header">
+                <h2>Administration</h2>
+                <button class="btn-icon" id="close-admin-btn">
+                    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                        <line x1="18" y1="6" x2="6" y2="18"></line>
+                        <line x1="6" y1="6" x2="18" y2="18"></line>
+                    </svg>
+                </button>
+            </div>
+            <button class="btn btn-primary" id="add-user-btn">
+                <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                    <path d="M16 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"></path>
+                    <circle cx="8.5" cy="7" r="4"></circle>
+                    <line x1="20" y1="8" x2="20" y2="14"></line>
+                    <line x1="23" y1="11" x2="17" y2="11"></line>
+                </svg>
+                Ajouter un utilisateur
+            </button>
+            <div class="user-list" id="users-list">
+                <!-- Users will be dynamically inserted here -->
+            </div>
+        </div>
+    </div>
+
     <script src="/js/auth.js"></script>
     <script src="/js/notes.js"></script>
     <script src="/js/admin.js"></script>