diff --git a/public/index.html b/public/index.html
index bf242dc..4edd463 100644
--- a/public/index.html
+++ b/public/index.html
@@ -10,8 +10,13 @@
 
         :root {
             --primary-color: #3B82F6;
+            --secondary-color: #2563EB;
             --background-color: #FAFAFA;
             --card-background: #FFFFFF;
+            --text-primary: #111827;
+            --text-secondary: #4B5563;
+            --text-muted: #6B7280;
+            --border-color: #E5E7EB;
         }
 
         * {
@@ -23,10 +28,53 @@
         body {
             font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
             line-height: 1.5;
-            color: #111827;
+            color: var(--text-primary);
             background-color: var(--background-color);
         }
 
+        /* Layout */
+        .container {
+            width: 100%;
+            max-width: 1200px;
+            margin: 0 auto;
+            padding: 0 1rem;
+        }
+
+        aside {
+            position: fixed;
+            left: 0;
+            top: 0;
+            height: 100%;
+            width: 16rem;
+            background-color: white;
+            border-right: 1px solid var(--border-color);
+            overflow-y: auto;
+            z-index: 10;
+        }
+
+        main {
+            margin-left: 16rem;
+            padding: 2rem;
+        }
+
+        /* Typography */
+        h1, h2, h3, h4, h5, h6 {
+            font-weight: 700;
+            line-height: 1.2;
+        }
+
+        h1 {
+            font-size: 1.5rem;
+        }
+
+        h2 {
+            font-size: 1.25rem;
+        }
+
+        h3 {
+            font-size: 1.125rem;
+        }
+
         /* Utility classes */
         .hidden {
             display: none !important;
@@ -64,202 +112,219 @@
             font-size: 0.875rem;
         }
 
-        .mb-1 {
-            margin-bottom: 0.25rem;
-        }
+        /* Margin & Padding */
+        .m-0 { margin: 0; }
+        .m-1 { margin: 0.25rem; }
+        .m-2 { margin: 0.5rem; }
+        .m-4 { margin: 1rem; }
+        .m-6 { margin: 1.5rem; }
+        .m-8 { margin: 2rem; }
 
-        .mb-4 {
-            margin-bottom: 1rem;
-        }
+        .mt-1 { margin-top: 0.25rem; }
+        .mt-2 { margin-top: 0.5rem; }
+        .mt-4 { margin-top: 1rem; }
+        .mt-6 { margin-top: 1.5rem; }
+        .mt-8 { margin-top: 2rem; }
 
-        .mb-6 {
-            margin-bottom: 1.5rem;
-        }
+        .mb-1 { margin-bottom: 0.25rem; }
+        .mb-2 { margin-bottom: 0.5rem; }
+        .mb-4 { margin-bottom: 1rem; }
+        .mb-6 { margin-bottom: 1.5rem; }
+        .mb-8 { margin-bottom: 2rem; }
 
-        .mb-8 {
-            margin-bottom: 2rem;
-        }
+        .ml-1 { margin-left: 0.25rem; }
+        .ml-2 { margin-left: 0.5rem; }
+        .ml-4 { margin-left: 1rem; }
+        .ml-6 { margin-left: 1.5rem; }
+        .ml-8 { margin-left: 2rem; }
+        .ml-auto { margin-left: auto; }
 
-        .ml-2 {
-            margin-left: 0.5rem;
-        }
+        .mr-1 { margin-right: 0.25rem; }
+        .mr-2 { margin-right: 0.5rem; }
+        .mr-4 { margin-right: 1rem; }
+        .mr-6 { margin-right: 1.5rem; }
+        .mr-8 { margin-right: 2rem; }
+        .mr-auto { margin-right: auto; }
 
-        .ml-4 {
-            margin-left: 1rem;
-        }
+        .mx-auto { margin-left: auto; margin-right: auto; }
+        .my-4 { margin-top: 1rem; margin-bottom: 1rem; }
 
-        .ml-auto {
-            margin-left: auto;
-        }
+        .p-1 { padding: 0.25rem; }
+        .p-2 { padding: 0.5rem; }
+        .p-4 { padding: 1rem; }
+        .p-6 { padding: 1.5rem; }
+        .p-8 { padding: 2rem; }
 
-        .p-1 {
-            padding: 0.25rem;
-        }
+        .px-1 { padding-left: 0.25rem; padding-right: 0.25rem; }
+        .px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
+        .px-4 { padding-left: 1rem; padding-right: 1rem; }
+        .px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
+        .px-8 { padding-left: 2rem; padding-right: 2rem; }
 
-        .p-2 {
-            padding: 0.5rem;
-        }
+        .py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
+        .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
+        .py-4 { padding-top: 1rem; padding-bottom: 1rem; }
+        .py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
+        .py-8 { padding-top: 2rem; padding-bottom: 2rem; }
 
-        .p-4 {
-            padding: 1rem;
-        }
+        .pt-1 { padding-top: 0.25rem; }
+        .pt-2 { padding-top: 0.5rem; }
+        .pt-4 { padding-top: 1rem; }
+        .pt-6 { padding-top: 1.5rem; }
+        .pt-8 { padding-top: 2rem; }
 
-        .p-6 {
-            padding: 1.5rem;
-        }
+        .pb-1 { padding-bottom: 0.25rem; }
+        .pb-2 { padding-bottom: 0.5rem; }
+        .pb-4 { padding-bottom: 1rem; }
+        .pb-6 { padding-bottom: 1.5rem; }
+        .pb-8 { padding-bottom: 2rem; }
 
-        .p-8 {
-            padding: 2rem;
-        }
+        .pl-1 { padding-left: 0.25rem; }
+        .pl-2 { padding-left: 0.5rem; }
+        .pl-4 { padding-left: 1rem; }
+        .pl-6 { padding-left: 1.5rem; }
+        .pl-8 { padding-left: 2rem; }
+        .pl-8 { padding-left: 8rem; }
 
-        .px-4 {
-            padding-left: 1rem;
-            padding-right: 1rem;
-        }
+        .pr-1 { padding-right: 0.25rem; }
+        .pr-2 { padding-right: 0.5rem; }
+        .pr-4 { padding-right: 1rem; }
+        .pr-6 { padding-right: 1.5rem; }
+        .pr-8 { padding-right: 2rem; }
 
-        .py-2 {
-            padding-top: 0.5rem;
-            padding-bottom: 0.5rem;
-        }
+        /* Flex & Grid */
+        .flex { display: flex; }
+        .inline-flex { display: inline-flex; }
+        .flex-col { flex-direction: column; }
+        .flex-row { flex-direction: row; }
+        .flex-wrap { flex-wrap: wrap; }
+        .flex-nowrap { flex-wrap: nowrap; }
+        .flex-1 { flex: 1 1 0%; }
+        .flex-auto { flex: 1 1 auto; }
+        .flex-initial { flex: 0 1 auto; }
+        .flex-none { flex: none; }
+        .flex-grow { flex-grow: 1; }
+        .flex-shrink { flex-shrink: 1; }
+        .flex-grow-0 { flex-grow: 0; }
+        .flex-shrink-0 { flex-shrink: 0; }
 
-        .pt-4 {
-            padding-top: 1rem;
-        }
+        .items-start { align-items: flex-start; }
+        .items-end { align-items: flex-end; }
+        .items-center { align-items: center; }
+        .items-baseline { align-items: baseline; }
+        .items-stretch { align-items: stretch; }
 
-        .rounded {
-            border-radius: 0.25rem;
-        }
+        .justify-start { justify-content: flex-start; }
+        .justify-end { justify-content: flex-end; }
+        .justify-center { justify-content: center; }
+        .justify-between { justify-content: space-between; }
+        .justify-around { justify-content: space-around; }
+        .justify-evenly { justify-content: space-evenly; }
 
-        .rounded-lg {
-            border-radius: 0.5rem;
-        }
+        .grid { display: grid; }
+        .grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
+        .grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
+        .grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
+        .grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
+        .gap-1 { gap: 0.25rem; }
+        .gap-2 { gap: 0.5rem; }
+        .gap-4 { gap: 1rem; }
+        .gap-6 { gap: 1.5rem; }
+        .gap-8 { gap: 2rem; }
 
-        .rounded-full {
-            border-radius: 9999px;
-        }
+        /* Spacing */
+        .space-y-1 > * + * { margin-top: 0.25rem; }
+        .space-y-2 > * + * { margin-top: 0.5rem; }
+        .space-y-4 > * + * { margin-top: 1rem; }
+        .space-y-6 > * + * { margin-top: 1.5rem; }
+        .space-y-8 > * + * { margin-top: 2rem; }
 
-        .border {
-            border: 1px solid #E5E7EB;
-        }
+        .space-x-1 > * + * { margin-left: 0.25rem; }
+        .space-x-2 > * + * { margin-left: 0.5rem; }
+        .space-x-4 > * + * { margin-left: 1rem; }
+        .space-x-6 > * + * { margin-left: 1.5rem; }
+        .space-x-8 > * + * { margin-left: 2rem; }
 
-        .border-t {
-            border-top: 1px solid #E5E7EB;
-        }
+        /* Sizing */
+        .w-full { width: 100%; }
+        .w-auto { width: auto; }
+        .w-96 { width: 24rem; }
+        .w-64 { width: 16rem; }
+        .w-48 { width: 12rem; }
+        .w-32 { width: 8rem; }
+        .w-24 { width: 6rem; }
+        .w-16 { width: 4rem; }
+        .w-8 { width: 2rem; }
+        .w-4 { width: 1rem; }
+        .w-2 { width: 0.5rem; }
+        .w-1 { width: 0.25rem; }
 
-        .border-r {
-            border-right: 1px solid #E5E7EB;
-        }
+        .h-full { height: 100%; }
+        .h-auto { height: auto; }
+        .h-screen { height: 100vh; }
+        .h-96 { height: 24rem; }
+        .h-64 { height: 16rem; }
+        .h-48 { height: 12rem; }
+        .h-32 { height: 8rem; }
+        .h-24 { height: 6rem; }
+        .h-16 { height: 4rem; }
+        .h-8 { height: 2rem; }
+        .h-4 { height: 1rem; }
+        .h-2 { height: 0.5rem; }
+        .h-1 { height: 0.25rem; }
 
-        .shadow-md {
-            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
-        }
+        .min-h-screen { min-height: 100vh; }
+        .min-h-\[200px\] { min-height: 200px; }
+        .max-w-4xl { max-width: 56rem; }
 
-        .shadow-sm {
-            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
-        }
+        /* Positioning */
+        .relative { position: relative; }
+        .absolute { position: absolute; }
+        .fixed { position: fixed; }
+        .sticky { position: sticky; }
+        .static { position: static; }
 
-        .w-full {
-            width: 100%;
-        }
+        .inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
+        .top-0 { top: 0; }
+        .right-0 { right: 0; }
+        .bottom-0 { bottom: 0; }
+        .left-0 { left: 0; }
+        .top-2 { top: 0.5rem; }
+        .right-2 { right: 0.5rem; }
+        .bottom-2 { bottom: 0.5rem; }
+        .left-2 { left: 0.5rem; }
+        .top-2\.5 { top: 0.625rem; }
 
-        .w-96 {
-            width: 24rem;
-        }
+        /* Borders & Shadows */
+        .rounded { border-radius: 0.25rem; }
+        .rounded-md { border-radius: 0.375rem; }
+        .rounded-lg { border-radius: 0.5rem; }
+        .rounded-full { border-radius: 9999px; }
 
-        .w-64 {
-            width: 16rem;
-        }
+        .border { border: 1px solid var(--border-color); }
+        .border-t { border-top: 1px solid var(--border-color); }
+        .border-r { border-right: 1px solid var(--border-color); }
+        .border-b { border-bottom: 1px solid var(--border-color); }
+        .border-l { border-left: 1px solid var(--border-color); }
+        .border-none { border: none; }
 
-        .w-4 {
-            width: 1rem;
-        }
+        .shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }
+        .shadow { box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06); }
+        .shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); }
+        .shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }
 
-        .h-4 {
-            height: 1rem;
-        }
+        /* Text & Colors */
+        .text-white { color: white; }
+        .text-gray-400 { color: #9CA3AF; }
+        .text-gray-500 { color: #6B7280; }
+        .text-gray-600 { color: #4B5563; }
+        .text-gray-900 { color: #111827; }
+        .text-red-600 { color: #DC2626; }
+        .text-blue-600 { color: #2563EB; }
 
-        .min-h-screen {
-            min-height: 100vh;
-        }
-
-        .min-h-\[200px\] {
-            min-height: 200px;
-        }
-
-        .flex {
-            display: flex;
-        }
-
-        .grid {
-            display: grid;
-        }
-
-        .grid-cols-4 {
-            grid-template-columns: repeat(4, minmax(0, 1fr));
-        }
-
-        .gap-4 {
-            gap: 1rem;
-        }
-
-        .space-y-2 > * + * {
-            margin-top: 0.5rem;
-        }
-
-        .space-y-4 > * + * {
-            margin-top: 1rem;
-        }
-
-        .space-x-4 > * + * {
-            margin-left: 1rem;
-        }
-
-        .items-center {
-            align-items: center;
-        }
-
-        .justify-center {
-            justify-content: center;
-        }
-
-        .justify-between {
-            justify-content: space-between;
-        }
-
-        .fixed {
-            position: fixed;
-        }
-
-        .absolute {
-            position: absolute;
-        }
-
-        .relative {
-            position: relative;
-        }
-
-        .inset-0 {
-            top: 0;
-            right: 0;
-            bottom: 0;
-            left: 0;
-        }
-
-        .left-0 {
-            left: 0;
-        }
-
-        .top-0 {
-            top: 0;
-        }
-
-        .left-2 {
-            left: 0.5rem;
-        }
-
-        .top-2\.5 {
-            top: 0.625rem;
-        }
+        .bg-opacity-50 { --tw-bg-opacity: 0.5; }
+        .bg-black { background-color: black; }
+        .bg-blue-600 { background-color: #2563EB; }
 
         .truncate {
             overflow: hidden;
@@ -267,62 +332,18 @@
             white-space: nowrap;
         }
 
-        .overflow-y-auto {
-            overflow-y: auto;
-        }
+        .overflow-hidden { overflow: hidden; }
+        .overflow-y-auto { overflow-y: auto; }
+        .overflow-x-hidden { overflow-x: hidden; }
 
-        .bg-opacity-50 {
-            --tw-bg-opacity: 0.5;
-        }
-
-        .text-gray-400 {
-            color: #9CA3AF;
-        }
-
-        .text-gray-500 {
-            color: #6B7280;
-        }
-
-        .text-gray-600 {
-            color: #4B5563;
-        }
-
-        .text-gray-900 {
-            color: #111827;
-        }
-
-        .text-white {
-            color: white;
-        }
-
-        .text-red-600 {
-            color: #DC2626;
-        }
-
-        .text-blue-600 {
-            color: #2563EB;
-        }
-
-        .hover\:bg-gray-100:hover {
-            background-color: #F3F4F6;
-        }
-
-        .hover\:text-gray-900:hover {
-            color: #111827;
-        }
-
-        .hover\:text-red-600:hover {
-            color: #DC2626;
-        }
-
-        .focus\:outline-none:focus {
-            outline: none;
-        }
+        /* Hover & Focus states */
+        .hover\:bg-gray-100:hover { background-color: #F3F4F6; }
+        .hover\:text-gray-900:hover { color: #111827; }
+        .hover\:text-red-600:hover { color: #DC2626; }
+        .focus\:outline-none:focus { outline: none; }
 
         /* Transitions */
-        .transition {
-            transition: all 200ms ease-in-out;
-        }
+        .transition { transition: all 200ms ease-in-out; }
 
         /* Form elements */
         input[type="text"],
@@ -330,7 +351,7 @@
         textarea {
             width: 100%;
             padding: 0.5rem 0.75rem;
-            border: 1px solid #E5E7EB;
+            border: 1px solid var(--border-color);
             border-radius: 0.375rem;
             background-color: white;
         }
@@ -340,7 +361,7 @@
         textarea:focus {
             outline: none;
             border-color: var(--primary-color);
-            ring: 2px var(--primary-color);
+            box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
         }
 
         /* Buttons */
@@ -349,11 +370,15 @@
         }
 
         .btn {
+            display: inline-flex;
+            align-items: center;
+            justify-content: center;
             padding: 0.5rem 1rem;
             border-radius: 0.375rem;
             font-weight: 500;
             cursor: pointer;
             transition: all 200ms;
+            border: none;
         }
 
         .btn-primary {
@@ -362,7 +387,33 @@
         }
 
         .btn-primary:hover {
-            background-color: #2563EB;
+            background-color: var(--secondary-color);
+        }
+
+        .btn-secondary {
+            background-color: #E5E7EB;
+            color: #4B5563;
+        }
+
+        .btn-secondary:hover {
+            background-color: #D1D5DB;
+        }
+
+        .btn-danger {
+            background-color: #EF4444;
+            color: white;
+        }
+
+        .btn-danger:hover {
+            background-color: #DC2626;
+        }
+
+        .btn-icon {
+            padding: 0.5rem;
+            border-radius: 9999px;
+            display: inline-flex;
+            align-items: center;
+            justify-content: center;
         }
 
         /* Note item in sidebar */
@@ -450,23 +501,6 @@
             animation: fadeIn 200ms ease-in-out;
         }
 
-        /* Layout */
-        aside {
-            position: fixed;
-            left: 0;
-            top: 0;
-            height: 100%;
-            width: 16rem;
-            background-color: white;
-            border-right: 1px solid #E5E7EB;
-            overflow-y: auto;
-        }
-
-        main {
-            margin-left: 16rem;
-            padding: 2rem;
-        }
-
         /* Responsive adjustments */
         @media (max-width: 768px) {
             aside {
@@ -482,6 +516,20 @@
             .note-editor {
                 margin: 1rem;
             }
+            
+            .grid-cols-4 {
+                grid-template-columns: repeat(2, minmax(0, 1fr));
+            }
+        }
+
+        @media (max-width: 480px) {
+            .grid-cols-4 {
+                grid-template-columns: repeat(1, minmax(0, 1fr));
+            }
+            
+            .w-96 {
+                width: 100%;
+            }
         }
     </style>
 </head>
@@ -499,7 +547,7 @@
                     <label class="block text-sm font-medium mb-1">Mot de passe</label>
                     <input type="password" id="password" class="w-full p-2 border rounded" required>
                 </div>
-                <button type="submit" style="width: 100%; background-color: #3B82F6; color: white; padding: 0.5rem; border-radius: 0.375rem; font-weight: 500; transition: all 200ms;">
+                <button type="submit" class="btn btn-primary w-full">
                     Se connecter
                 </button>
             </form>
@@ -509,54 +557,62 @@
     <!-- Main App Container -->
     <div id="app-container" class="hidden min-h-screen">
         <!-- Sidebar -->
-        <aside class="fixed left-0 top-0 h-full w-64 bg-white border-r border-gray-200 overflow-y-auto">
+        <aside class="sidebar">
             <div class="p-4">
                 <div class="flex items-center justify-between mb-6">
                     <h1 class="text-xl font-bold">Notes & Todos</h1>
-                    <button id="new-note-btn" class="p-2 rounded-full hover:bg-gray-100">
-                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-plus"><line x1="12" y1="5" x2="12" y2="19"></line><line x1="5" y1="12" x2="19" y2="12"></line></svg>
+                    <button id="new-note-btn" class="btn-icon hover:bg-gray-100">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><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="relative mb-4">
+                <div class="search-container relative mb-4">
                     <input type="text" id="search-notes" placeholder="Rechercher..." 
                            class="w-full pl-8 pr-3 py-2 border rounded bg-gray-50">
                     <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="absolute left-2 top-2.5 text-gray-400 w-4 h-4"><circle cx="11" cy="11" r="8"></circle><line x1="21" y1="21" x2="16.65" y2="16.65"></line></svg>
                 </div>
-                <div id="notes-list" class="space-y-2">
+                <div id="notes-list" class="notes-list space-y-2">
                     <!-- Notes will be dynamically inserted here -->
                 </div>
             </div>
         </aside>
 
         <!-- Main Content -->
-        <main class="ml-64 p-8">
-            <header class="flex justify-between items-center mb-8">
-                <div class="flex items-center space-x-4">
+        <main class="main-content">
+            <header class="main-header flex justify-between items-center mb-8">
+                <div class="note-actions flex items-center space-x-4">
                     <button id="archive-note-btn" class="text-gray-600 hover:text-gray-900">
-                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-archive"><polyline points="21 8 21 21 3 21 3 8"></polyline><rect x="1" y="3" width="22" height="5"></rect><line x1="10" y1="12" x2="14" y2="12"></line></svg>
+                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="21 8 21 21 3 21 3 8"></polyline><rect x="1" y="3" width="22" height="5"></rect><line x1="10" y1="12" x2="14" y2="12"></line></svg>
                     </button>
                     <button id="delete-note-btn" class="text-gray-600 hover:text-red-600">
-                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-trash-2"><polyline points="3 6 5 6 21 6"></polyline><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"></path><line x1="10" y1="11" x2="10" y2="17"></line><line x1="14" y1="11" x2="14" y2="17"></line></svg>
+                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="3 6 5 6 21 6"></polyline><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"></path><line x1="10" y1="11" x2="10" y2="17"></line><line x1="14" y1="11" x2="14" y2="17"></line></svg>
                     </button>
                 </div>
-                <div class="flex items-center space-x-4">
+                <div class="user-controls flex items-center space-x-4">
                     <span id="user-info" class="text-sm text-gray-600"></span>
                     <button id="logout-btn" class="text-gray-600 hover:text-gray-900">
-                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-log-out"><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>
+                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><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>
                     </button>
                 </div>
             </header>
 
-            <div id="note-editor" class="bg-white rounded-lg shadow-sm p-6 max-w-4xl mx-auto">
-                <input type="text" id="note-title" placeholder="Titre" 
-                       class="w-full text-2xl font-bold mb-4 border-none focus:outline-none">
-                <div id="note-content" contenteditable="true" 
-                     class="min-h-[200px] mb-4 focus:outline-none"></div>
+            <div id="note-editor" class="note-editor bg-white rounded-lg shadow-sm p-6 max-w-4xl mx-auto">
+                <!-- Note Title -->
+                <div class="note-title-container mb-4">
+                    <input type="text" id="note-title" placeholder="Titre" 
+                           class="w-full text-2xl font-bold border-none focus:outline-none">
+                </div>
                 
-                <div class="border-t pt-4">
+                <!-- Note Content -->
+                <div class="note-content-container mb-4">
+                    <div id="note-content" contenteditable="true" 
+                         class="min-h-[200px] focus:outline-none"></div>
+                </div>
+                
+                <!-- Todos Section -->
+                <div class="todos-section border-t pt-4">
                     <div class="flex items-center mb-4">
                         <h3 class="font-medium">Todos</h3>
-                        <button id="add-todo-btn" class="ml-2 p-1 rounded-full hover:bg-gray-100">
+                        <button id="add-todo-btn" class="ml-2 btn-icon hover:bg-gray-100">
                             <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="w-4 h-4"><line x1="12" y1="5" x2="12" y2="19"></line><line x1="5" y1="12" x2="19" y2="12"></line></svg>
                         </button>
                     </div>
@@ -565,10 +621,11 @@
                     </div>
                 </div>
 
-                <div class="border-t mt-4 pt-4">
+                <!-- Images Section -->
+                <div class="images-section border-t mt-4 pt-4">
                     <div class="flex items-center mb-4">
                         <h3 class="font-medium">Images</h3>
-                        <label for="image-upload" class="ml-2 p-1 rounded-full hover:bg-gray-100 cursor-pointer">
+                        <label for="image-upload" class="ml-2 btn-icon hover:bg-gray-100 cursor-pointer">
                             <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="w-4 h-4"><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" class="hidden" accept="image/*">
@@ -581,16 +638,16 @@
         </main>
 
         <!-- Admin Panel -->
-        <div id="admin-panel" class="hidden fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center">
-            <div class="bg-white rounded-lg p-6 w-[600px]">
+        <div id="admin-panel" class="admin-panel hidden fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center">
+            <div class="bg-white rounded-lg p-6" style="width: 600px; max-width: 90vw;">
                 <div class="flex justify-between items-center mb-4">
                     <h2 class="text-xl font-bold">Gestion des utilisateurs</h2>
                     <button id="close-admin-btn" class="text-gray-600 hover:text-gray-900">
-                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-x"><line x1="18" y1="6" x2="6" y2="18"></line><line x1="6" y1="6" x2="18" y2="18"></line></svg>
+                        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"></line><line x1="6" y1="6" x2="18" y2="18"></line></svg>
                     </button>
                 </div>
                 <div class="mb-4">
-                    <button id="add-user-btn" style="background-color: #3B82F6; color: white; padding: 0.5rem 1rem; border-radius: 0.375rem;">
+                    <button id="add-user-btn" class="btn btn-primary">
                         Ajouter un utilisateur
                     </button>
                 </div>
@@ -601,6 +658,7 @@
         </div>
     </div>
 
+    <!-- Scripts -->
     <script src="/js/auth.js"></script>
     <script src="/js/notes.js"></script>
     <script src="/js/admin.js"></script>