diff --git a/public/css/layout.css b/public/css/layout.css
index b169d12..1602f71 100644
--- a/public/css/layout.css
+++ b/public/css/layout.css
@@ -1,10 +1,18 @@
-/* Layout principal de l'application */
+/* Layout - Structure principale */
+
+* {
+  box-sizing: border-box;
+  margin: 0;
+  padding: 0;
+}
 
 body {
   font-family: var(--font-family);
-  background: var(--color-background);
-  color: var(--color-text-primary);
   font-size: var(--font-size-base);
+  color: var(--color-text-primary);
+  background: var(--color-background);
+  line-height: 1.6;
+  min-height: 100vh;
 }
 
 /* Header */
@@ -16,114 +24,330 @@ body {
   height: var(--header-height);
   background: var(--color-card);
   border-bottom: 1px solid var(--color-border);
-  z-index: 100;
   box-shadow: var(--shadow-sm);
+  z-index: var(--z-header);
 }
 
-.header-content {
+.header-container {
+  max-width: var(--max-width);
   height: 100%;
-  max-width: 100%;
-  padding: 0 var(--spacing-lg);
+  margin: 0 auto;
+  padding: 0 var(--spacing-xl);
   display: flex;
   align-items: center;
-  justify-content: space-between;
-  gap: var(--spacing-lg);
+  gap: var(--spacing-xl);
 }
 
-.header-logo h1 {
-  font-size: var(--font-size-xl);
-  font-weight: bold;
+/* Logo */
+.logo {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-md);
+  flex-shrink: 0;
+}
+
+.logo-icon {
+  width: 32px;
+  height: 32px;
   color: var(--color-accent);
 }
 
-.header-search {
+.logo-text {
+  font-size: var(--font-size-xl);
+  font-weight: var(--font-weight-bold);
+  color: var(--color-accent);
+  letter-spacing: -0.5px;
+}
+
+/* Search */
+.search-container {
   flex: 1;
-  max-width: 600px;
+  max-width: 500px;
   position: relative;
 }
 
-.header-user {
-  position: relative;
+.search-icon {
+  position: absolute;
+  left: var(--spacing-md);
+  top: 50%;
+  transform: translateY(-50%);
+  width: 18px;
+  height: 18px;
+  color: var(--color-text-secondary);
+  pointer-events: none;
 }
 
-/* Main container */
-.main-container {
+.search-input {
+  width: 100%;
+  height: 44px;
+  padding: 0 var(--spacing-xl) 0 44px;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-full);
+  font-size: var(--font-size-base);
+  background: var(--color-background);
+  color: var(--color-text-primary);
+  transition: all var(--transition-base);
+}
+
+.search-input:focus {
+  outline: none;
+  border-color: var(--color-accent);
+  background: var(--color-card);
+  box-shadow: var(--shadow-sm);
+}
+
+.search-clear {
+  position: absolute;
+  right: var(--spacing-md);
+  top: 50%;
+  transform: translateY(-50%);
+  width: 24px;
+  height: 24px;
+  padding: 4px;
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  color: var(--color-text-secondary);
+  border-radius: 50%;
+  transition: all var(--transition-fast);
+}
+
+.search-clear:hover {
+  background: var(--color-hover);
+  color: var(--color-text-primary);
+}
+
+.search-clear svg {
+  width: 100%;
+  height: 100%;
+}
+
+/* User Menu */
+.user-menu {
+  position: relative;
+  flex-shrink: 0;
+}
+
+.user-button {
   display: flex;
+  align-items: center;
+  gap: var(--spacing-sm);
+  padding: var(--spacing-sm) var(--spacing-md);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-full);
+  background: var(--color-card);
+  color: var(--color-text-primary);
+  font-size: var(--font-size-sm);
+  font-weight: var(--font-weight-medium);
+  cursor: pointer;
+  transition: all var(--transition-base);
+}
+
+.user-button:hover {
+  background: var(--color-hover);
+  box-shadow: var(--shadow-sm);
+}
+
+.user-icon {
+  width: 20px;
+  height: 20px;
+}
+
+.dropdown-arrow {
+  width: 16px;
+  height: 16px;
+  transition: transform var(--transition-base);
+}
+
+.user-menu:hover .dropdown-arrow {
+  transform: rotate(180deg);
+}
+
+.user-dropdown {
+  position: absolute;
+  top: calc(100% + var(--spacing-sm));
+  right: 0;
+  min-width: 200px;
+  background: var(--color-card);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md);
+  box-shadow: var(--shadow-lg);
+  opacity: 0;
+  visibility: hidden;
+  transform: translateY(-10px);
+  transition: all var(--transition-base);
+  z-index: var(--z-dropdown);
+}
+
+.user-menu:hover .user-dropdown {
+  opacity: 1;
+  visibility: visible;
+  transform: translateY(0);
+}
+
+.dropdown-item {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-md);
+  width: 100%;
+  padding: var(--spacing-md) var(--spacing-lg);
+  border: none;
+  background: transparent;
+  color: var(--color-text-primary);
+  font-size: var(--font-size-sm);
+  font-weight: var(--font-weight-medium);
+  text-align: left;
+  cursor: pointer;
+  transition: background var(--transition-fast);
+}
+
+.dropdown-item:first-child {
+  border-radius: var(--radius-md) var(--radius-md) 0 0;
+}
+
+.dropdown-item:last-child {
+  border-radius: 0 0 var(--radius-md) var(--radius-md);
+}
+
+.dropdown-item:hover {
+  background: var(--color-hover);
+}
+
+.dropdown-item svg {
+  width: 18px;
+  height: 18px;
+}
+
+/* Main Content */
+.main-content {
   margin-top: var(--header-height);
   min-height: calc(100vh - var(--header-height));
+  padding: var(--spacing-2xl) var(--spacing-xl);
 }
 
-/* Notes area */
-.notes-area {
-  flex: 1;
-  padding: var(--spacing-xl);
-  overflow-y: auto;
-  position: relative;
+.content-container {
+  max-width: var(--max-width);
+  margin: 0 auto;
+  display: grid;
+  grid-template-columns: 1fr var(--todo-box-width);
+  gap: var(--spacing-xl);
+  align-items: start;
+}
+
+/* Notes Section */
+.notes-section {
+  min-width: 0;
+}
+
+.section-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: var(--spacing-lg);
+}
+
+.section-title {
+  font-size: var(--font-size-2xl);
+  font-weight: var(--font-weight-bold);
+  color: var(--color-text-primary);
+}
+
+.btn-new-note {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-sm);
+  padding: var(--spacing-md) var(--spacing-lg);
+  border: none;
+  border-radius: var(--radius-md);
+  background: var(--color-accent);
+  color: white;
+  font-size: var(--font-size-sm);
+  font-weight: var(--font-weight-semibold);
+  cursor: pointer;
+  transition: all var(--transition-base);
+  box-shadow: var(--shadow-sm);
+}
+
+.btn-new-note:hover {
+  background: var(--color-accent-hover);
+  box-shadow: var(--shadow-md);
+  transform: translateY(-1px);
+}
+
+.btn-new-note svg {
+  width: 18px;
+  height: 18px;
 }
 
 .notes-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(var(--note-card-width), 1fr));
+  grid-template-columns: repeat(auto-fill, minmax(var(--note-width), 1fr));
   gap: var(--spacing-lg);
-  max-width: 1400px;
-  margin: 0 auto;
 }
 
-/* Todo sidebar */
-.todo-sidebar {
+/* Todo Box */
+.todo-box {
   position: sticky;
-  top: var(--header-height);
-  right: 0;
-  width: var(--sidebar-width);
-  height: calc(100vh - var(--header-height));
-  background: var(--color-sidebar);
-  border-left: 1px solid var(--color-border);
-  padding: var(--spacing-lg);
-  overflow-y: auto;
-  flex-shrink: 0;
+  top: calc(var(--header-height) + var(--spacing-xl));
+  background: var(--color-card);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-lg);
+  padding: var(--spacing-xl);
+  box-shadow: var(--shadow-md);
+  max-height: calc(100vh - var(--header-height) - var(--spacing-2xl) * 2);
+  display: flex;
+  flex-direction: column;
+}
+
+.todo-box-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: var(--spacing-lg);
+}
+
+.todo-box-title {
+  font-size: var(--font-size-xl);
+  font-weight: var(--font-weight-bold);
+  color: var(--color-text-primary);
+}
+
+.todo-counter {
+  font-size: var(--font-size-sm);
+  color: var(--color-text-secondary);
+  font-weight: var(--font-weight-medium);
 }
 
 /* Responsive */
-@media (max-width: 1024px) {
-  .notes-grid {
-    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
+@media (max-width: 1200px) {
+  .content-container {
+    grid-template-columns: 1fr;
   }
 
-  .todo-sidebar {
-    width: 320px;
+  .todo-box {
+    position: static;
+    max-height: none;
   }
 }
 
 @media (max-width: 768px) {
-  .main-container {
-    flex-direction: column;
-  }
-
-  .header-content {
+  .header-container {
     padding: 0 var(--spacing-md);
-    gap: var(--spacing-sm);
   }
 
-  .header-logo h1 {
-    font-size: var(--font-size-lg);
+  .search-container {
+    max-width: 300px;
   }
 
-  .header-search {
-    max-width: 400px;
+  .logo-text {
+    display: none;
   }
 
-  .notes-area {
-    padding: var(--spacing-md);
+  .main-content {
+    padding: var(--spacing-lg) var(--spacing-md);
   }
 
   .notes-grid {
     grid-template-columns: 1fr;
   }
-
-  .todo-sidebar {
-    position: static;
-    width: 100%;
-    height: auto;
-    max-height: 400px;
-  }
 }
diff --git a/public/css/variables.css b/public/css/variables.css
index 30b8c4b..34a160f 100644
--- a/public/css/variables.css
+++ b/public/css/variables.css
@@ -1,26 +1,38 @@
-/* Variables CSS globales */
+/* Variables CSS globales - Thème clair moderne */
 
 :root {
   /* Couleurs principales */
-  --color-background: #FAFBFC;
+  --color-background: #F8F9FA;
   --color-card: #FFFFFF;
-  --color-sidebar: #F8F9FA;
-  --color-accent: #3B82F6;
-  --color-accent-hover: #2563EB;
-  --color-text-primary: #1F2937;
-  --color-text-secondary: #6B7280;
-  --color-border: #E5E7EB;
-  --color-success: #10B981;
-  --color-danger: #EF4444;
+  --color-accent: #000000;
+  --color-accent-hover: #333333;
+  --color-text-primary: #000000;
+  --color-text-secondary: #6C757D;
+  --color-border: #DEE2E6;
+  --color-success: #28A745;
+  --color-danger: #DC3545;
+  --color-warning: #FFC107;
+  --color-info: #17A2B8;
+
+  /* Couleurs spécifiques */
+  --color-hover: #F1F3F5;
+  --color-active: #E9ECEF;
+  --color-disabled: #ADB5BD;
 
   /* Typographie */
-  --font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
-  --font-size-xs: 12px;
-  --font-size-sm: 14px;
-  --font-size-base: 16px;
-  --font-size-lg: 18px;
-  --font-size-xl: 24px;
-  --font-size-2xl: 32px;
+  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+  --font-size-xs: 11px;
+  --font-size-sm: 13px;
+  --font-size-base: 15px;
+  --font-size-lg: 17px;
+  --font-size-xl: 20px;
+  --font-size-2xl: 28px;
+  --font-size-3xl: 36px;
+
+  --font-weight-normal: 400;
+  --font-weight-medium: 500;
+  --font-weight-semibold: 600;
+  --font-weight-bold: 700;
 
   /* Spacing */
   --spacing-xs: 4px;
@@ -28,26 +40,43 @@
   --spacing-md: 16px;
   --spacing-lg: 24px;
   --spacing-xl: 32px;
+  --spacing-2xl: 48px;
+  --spacing-3xl: 64px;
 
   /* Border radius */
-  --radius-sm: 4px;
-  --radius-md: 8px;
-  --radius-lg: 12px;
-  --radius-xl: 16px;
+  --radius-sm: 6px;
+  --radius-md: 10px;
+  --radius-lg: 14px;
+  --radius-xl: 20px;
+  --radius-full: 9999px;
 
-  /* Shadows */
-  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
-  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
-  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
-  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.3);
+  /* Shadows - Style moderne élégant */
+  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
+  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
+  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
+  --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.1);
+  --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.12);
+  --shadow-2xl: 0 24px 60px rgba(0, 0, 0, 0.15);
+
+  /* Shadow hover effects */
+  --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.12);
+  --shadow-active: 0 2px 8px rgba(0, 0, 0, 0.1);
 
   /* Transitions */
-  --transition-fast: 0.15s ease;
-  --transition-base: 0.2s ease;
-  --transition-slow: 0.3s ease;
+  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
+  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
+  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
 
   /* Dimensions */
-  --header-height: 60px;
-  --sidebar-width: 400px;
-  --note-card-width: 350px;
+  --header-height: 70px;
+  --max-width: 1400px;
+  --note-width: 320px;
+  --note-expanded-width: 680px;
+  --todo-box-width: 340px;
+
+  /* Z-index */
+  --z-header: 100;
+  --z-modal: 200;
+  --z-dropdown: 150;
+  --z-tooltip: 250;
 }
diff --git a/public/favicon.svg b/public/favicon.svg
new file mode 100644
index 0000000..108ae06
--- /dev/null
+++ b/public/favicon.svg
@@ -0,0 +1,23 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+  <defs>
+    <linearGradient id="gradient" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#000;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#333;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+
+  <!-- Background circle -->
+  <circle cx="50" cy="50" r="45" fill="url(#gradient)"/>
+
+  <!-- Note icon -->
+  <rect x="28" y="22" width="44" height="56" rx="4" fill="white"/>
+
+  <!-- Lines representing text -->
+  <line x1="35" y1="35" x2="65" y2="35" stroke="#000" stroke-width="2" stroke-linecap="round"/>
+  <line x1="35" y1="45" x2="60" y2="45" stroke="#000" stroke-width="2" stroke-linecap="round"/>
+  <line x1="35" y1="55" x2="65" y2="55" stroke="#000" stroke-width="2" stroke-linecap="round"/>
+
+  <!-- Checkmark -->
+  <circle cx="38" cy="65" r="4" fill="none" stroke="#000" stroke-width="1.5"/>
+  <path d="M 36.5 65 L 38 66.5 L 41 63" stroke="#000" stroke-width="1.5" fill="none" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/public/index.html b/public/index.html
index 838f31d..540e372 100644
--- a/public/index.html
+++ b/public/index.html
@@ -3,7 +3,10 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>NoteFlow - Notes & Todo</title>
+    <title>NoteFlow - Notes & Tasks</title>
+
+    <!-- Favicon -->
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg">
 
     <!-- CSS -->
     <link rel="stylesheet" href="/css/reset.css">
@@ -13,103 +16,184 @@
     <link rel="stylesheet" href="/css/animations.css">
 </head>
 <body>
-    <!-- Header fixe -->
+    <!-- Header -->
     <header class="header">
-        <div class="header-content">
-            <div class="header-logo">
-                <h1>📝 NoteFlow</h1>
+        <div class="header-container">
+            <!-- Logo -->
+            <div class="logo">
+                <svg class="logo-icon" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg">
+                    <rect x="8" y="6" width="24" height="28" rx="2" fill="currentColor"/>
+                    <rect x="10" y="8" width="20" height="24" rx="1" fill="white"/>
+                    <line x1="13" y1="13" x2="27" y2="13" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/>
+                    <line x1="13" y1="18" x2="24" y2="18" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/>
+                    <line x1="13" y1="23" x2="27" y2="23" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/>
+                    <circle cx="15" cy="28" r="2" fill="none" stroke="currentColor" stroke-width="1.2"/>
+                    <path d="M 14 28 L 14.8 28.8 L 16.5 27" stroke="currentColor" stroke-width="1.2" fill="none" stroke-linecap="round" stroke-linejoin="round"/>
+                </svg>
+                <span class="logo-text">NoteFlow</span>
             </div>
 
-            <div class="header-search">
+            <!-- Search -->
+            <div class="search-container">
+                <svg class="search-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                    <circle cx="11" cy="11" r="8"></circle>
+                    <path d="m21 21-4.35-4.35"></path>
+                </svg>
                 <input type="text" id="searchInput" placeholder="Rechercher des notes..." class="search-input">
-                <button id="searchClear" class="search-clear" style="display: none;">✕</button>
+                <button id="searchClear" class="search-clear" style="display: none;">
+                    <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>
 
-            <div class="header-user">
-                <div class="user-info" id="userInfo">
-                    <span class="user-avatar">👤</span>
-                    <span class="user-name" id="userName">User</span>
-                    <span class="user-dropdown-icon">▼</span>
-                </div>
+            <!-- User -->
+            <div class="user-menu">
+                <button class="user-button" id="userInfo">
+                    <svg class="user-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                        <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="userName">User</span>
+                    <svg class="dropdown-arrow" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                        <polyline points="6 9 12 15 18 9"></polyline>
+                    </svg>
+                </button>
                 <div class="user-dropdown" id="userDropdown">
-                    <button class="dropdown-item" id="adminBtn" style="display: none;">⚙️ Administration</button>
-                    <button class="dropdown-item" id="logoutBtn">🚪 Déconnexion</button>
+                    <button class="dropdown-item" id="adminBtn" style="display: none;">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                            <circle cx="12" cy="12" r="3"></circle>
+                            <path d="M12 1v6m0 6v6m5.657-13.657L14 9l-2.343-2.343M9 14l-3.657 3.657M1 12h6m6 0h6m-13.657 5.657L9 14l2.343 2.343M14 9l3.657-3.657"></path>
+                        </svg>
+                        Administration
+                    </button>
+                    <button class="dropdown-item" id="logoutBtn">
+                        <svg 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>
+                        Déconnexion
+                    </button>
                 </div>
             </div>
         </div>
     </header>
 
-    <!-- Container principal -->
-    <div class="main-container">
-        <!-- Zone des notes (70%) -->
-        <main class="notes-area">
-            <div class="notes-grid" id="notesGrid">
-                <!-- Les cards de notes seront insérées ici dynamiquement -->
+    <!-- Main Content -->
+    <main class="main-content">
+        <div class="content-container">
+            <!-- Notes Grid -->
+            <div class="notes-section">
+                <div class="section-header">
+                    <h2 class="section-title">Notes</h2>
+                    <button class="btn-new-note" id="newNoteBtn">
+                        <svg 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>
+                        Nouvelle note
+                    </button>
+                </div>
+                <div class="notes-grid" id="notesGrid">
+                    <!-- Notes will be inserted here -->
+                </div>
             </div>
 
-            <button class="fab" id="newNoteBtn" title="Nouvelle note">+</button>
-        </main>
+            <!-- Todo Box -->
+            <div class="todo-box">
+                <div class="todo-box-header">
+                    <h2 class="todo-box-title">Quick Tasks</h2>
+                    <span class="todo-counter" id="todoCounter">0 tâches</span>
+                </div>
 
-        <!-- Sidebar Todo (30%) -->
-        <aside class="todo-sidebar">
-            <h2 class="sidebar-title">Quick Tasks</h2>
+                <div class="todo-input-wrapper">
+                    <input type="text" id="todoInput" class="todo-input" placeholder="Ajouter une tâche...">
+                    <button id="addTodoBtn" class="btn-add-todo">
+                        <svg 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="todo-input-container">
-                <input type="text" id="todoInput" class="todo-input" placeholder="Ajouter une tâche...">
-                <button id="addTodoBtn" class="todo-add-btn">+</button>
+                <div class="todo-filters">
+                    <button class="filter-btn active" data-filter="all">Toutes</button>
+                    <button class="filter-btn" data-filter="active">Actives</button>
+                    <button class="filter-btn" data-filter="completed">Terminées</button>
+                </div>
+
+                <div class="todo-list" id="todoList">
+                    <!-- Todos will be inserted here -->
+                </div>
             </div>
+        </div>
+    </main>
 
-            <div class="todo-filters">
-                <button class="filter-btn active" data-filter="all">Toutes</button>
-                <button class="filter-btn" data-filter="active">Actives</button>
-                <button class="filter-btn" data-filter="completed">Terminées</button>
-            </div>
-
-            <div class="todo-counter">
-                <span id="todoCounter">0 tâches restantes</span>
-            </div>
-
-            <div class="todo-list" id="todoList">
-                <!-- Les todos seront insérées ici dynamiquement -->
-            </div>
-        </aside>
-    </div>
-
-    <!-- Modal Note -->
-    <div class="modal-backdrop" id="noteModal" style="display: none;">
-        <div class="modal-content note-modal">
-            <div class="modal-header">
-                <button class="modal-close" id="closeModal">✕</button>
-                <button class="modal-delete" id="deleteNote">🗑️</button>
+    <!-- Note Editor (Expanded in page) -->
+    <div class="note-editor-backdrop" id="noteEditorBackdrop" style="display: none;">
+        <div class="note-editor" id="noteEditor">
+            <div class="note-editor-header">
+                <button class="btn-close-editor" id="closeEditor">
+                    <svg 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 class="note-editor-actions">
+                    <button class="btn-icon" id="deleteNote" title="Supprimer">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="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>
+                        </svg>
+                    </button>
+                    <button class="btn-primary" id="saveNote">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                            <polyline points="20 6 9 17 4 12"></polyline>
+                        </svg>
+                        Enregistrer
+                    </button>
+                </div>
             </div>
 
             <input type="text" id="noteTitle" class="note-title-input" placeholder="Titre de la note">
 
-            <div class="note-divider"></div>
-
-            <textarea id="noteContent" class="note-content-textarea" placeholder="Contenu de la note..."></textarea>
+            <textarea id="noteContent" class="note-content-textarea" placeholder="Commencez à écrire..."></textarea>
 
             <div id="noteImageContainer" class="note-image-container" style="display: none;">
                 <img id="noteImage" class="note-image" alt="Image de la note">
-                <button class="note-image-remove" id="removeImage">✕</button>
+                <button class="btn-remove-image" id="removeImage">
+                    <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>
 
             <div class="note-todos-section">
                 <h3 class="note-section-title">Todos dans cette note</h3>
                 <div id="noteTodosList" class="note-todos-list">
-                    <!-- Les todos de la note seront insérés ici -->
+                    <!-- Note todos will be inserted here -->
                 </div>
-                <button class="note-add-todo-btn" id="addNoteTodo">+ Ajouter un todo</button>
+                <button class="btn-add-note-todo" id="addNoteTodo">
+                    <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>
+                    Ajouter un todo
+                </button>
             </div>
 
-            <div class="note-divider"></div>
-
-            <div class="modal-actions">
-                <button class="action-btn" id="addImageBtn">📷 Ajouter une image</button>
+            <div class="note-editor-footer">
+                <button class="btn-icon" id="addImageBtn" title="Ajouter une image">
+                    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+                        <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>
+                </button>
                 <input type="file" id="imageInput" accept="image/*" style="display: none;">
-            </div>
-
-            <div class="modal-footer">
                 <span id="noteMetadata" class="note-metadata"></span>
             </div>
         </div>
@@ -139,7 +223,7 @@
                         </tr>
                     </thead>
                     <tbody id="usersTableBody">
-                        <!-- Les utilisateurs seront insérés ici -->
+                        <!-- Users will be inserted here -->
                     </tbody>
                 </table>
             </div>
@@ -162,4 +246,4 @@
     <!-- JavaScript -->
     <script src="/js/complete-app.js"></script>
 </body>
-</html>
\ No newline at end of file
+</html>