diff --git a/TODO.md b/TODO.md
index 78fcaef..4e340c6 100644
--- a/TODO.md
+++ b/TODO.md
@@ -377,24 +377,28 @@
 
 ---
 
-### 17. 🍔 Разгрузка хеддера и единая навигация через боковое меню / Drawer (Unified Navigation & Header Redesign)
-- [ ] **Проблема перегруженного хеддера**:
-  - В шапке скопилось 8+ кнопок (`📚 Читалка`, `🎯 Тесты CEFR`, `📖 Грамматика`, `🎓 Тренажёр`, `📊 Статистика`, `📤 Экспорт`, тема, шестеренка, профиль), на экранах планшетов и ноутбуков возникает переполнение и визуальный шум.
-  - Разрозненность UX: на десктопе все кнопки в шапке, на мобильных — нижний таб-бар + модальное меню.
-- [ ] **Единый лаконичный Header (Desktop, Tablet, Mobile)**:
+### 17. 🍔 Разгрузка хеддера и единая навигация через боковое меню / Drawer (Unified Navigation & Header Redesign) (Completed)
+- [x] **Проблема перегруженного хеддера полностью решена**:
+  - Ликвидировано нагромождение из 8+ кнопок в шапке, устранён визуальный шум и горизонтальный сдвиг на планшетах и компактных экранах.
+  - Устранена разрозненность UX: на десктопе, планшете и смартфоне теперь действует единая система навигации.
+- [x] **Единый лаконичный Header (Desktop, Tablet, Mobile)**:
   - Слева: Кнопка вызова бокового меню (Бургер `☰` / `ph-list`), кликабельный логотип `📖 Notes` (возврат в словарь).
-  - Центр: Фокусная кнопка быстрого доступа к активному действию (например, `🎓 Тренажёр SRS` с живым счётчиком повторений `srs-badge`).
-  - Справа: Переключатель темы `🌓`, компактная плашка пользователя/аватар.
-- [ ] **Единый выдвижной Drawer (Боковое меню навигации)**:
-  - Плавная аппаратная анимация (`transform: translateX`, `backdrop-filter: blur`).
+  - Центр: Фокусная кнопка быстрого доступа к главному ежедневному действию (`🎓 Тренажёр SRS` с живым счётчиком повторений `srs-badge`) и компактные счетчики базы (`Всего: X`, `Сегодня: +Y`). На смартфонах счетчики автоматически скрываются, а кнопка сжимается до компактного бейджа `🎓 (N)`.
+  - Справа: Переключатель темы `🌓`, компактная плашка пользователя/аватар `👤 user` (на смартфонах отображается только иконка аватара).
+- [x] **Единый выдвижной Drawer (Боковое меню навигации)**:
+  - Плавная аппаратная анимация (`transform: translateX`, `backdrop-filter: blur(4px)`).
+  - Карточка профиля с аватаром, именем пользователя и описанием.
+  - Интерактивный мини-дашборд статистики (Всего в базе, Сегодня, На повторение).
   - Логическая группировка пунктов с красивыми иконками:
-    - **Обучение & Чтение**: Словарь, Читалка, Тесты CEFR, Грамматика Мерфи, Тренажёр SRS.
-    - **Аналитика**: Статистика обучения и календарь активности (Heatmap).
-    - **Настройки & Профиль**: Экспорт словаря, Смена пароля, Переключение темы, Выход.
+    - **Обучение & Чтение**: Словарь & Поиск, Тренажёр SRS (с живым бейджем), Читалка & Книги, Тесты CEFR (A1–B2), Грамматика Мерфи & Тетрадь.
+    - **Аналитика**: Календарь активности & Статистика (Heatmap).
+    - **Настройки & Профиль**: Экспорт словаря, Сменить пароль, Переключение темы, Выход из аккаунта.
   - Закрытие по клику вне области (оверлей), кнопке `✕`, клавише <kbd>Esc</kbd> и свайпу влево на тач-устройствах (Swipe to dismiss).
   - Блокировка скролла фона (`overflow: hidden` на `body`) при открытом Drawer.
-- [ ] **Оптимизация мобильного режима**:
-  - Согласование с Bottom Tab Bar: оставить на нижней панели только 3-4 ключевых быстрых действия либо полностью перевести навигацию в чистый Drawer-паттерн без дублирования элементов.
+  - Подсветка активного раздела (`.active`), синхронизированная с URL-хэшем и переходами между экранами.
+- [x] **Оптимизация мобильного режима**:
+  - На нижней панели (Bottom Tab Bar) оставлены 4 ключевых быстрых действия: `📖 Словарь`, `🎓 Тренажёр`, `📚 Читалка`, `☰ Меню`.
+  - Тап по `☰ Меню` на мобильном открывает единый Drawer, полностью заменив устаревший отдельный модальный слой `mobile-menu-modal` без дублирования верстки и стилей.
 
 ---
 
diff --git a/app/static/css/style.css b/app/static/css/style.css
index e59a394..e6bb59d 100644
--- a/app/static/css/style.css
+++ b/app/static/css/style.css
@@ -245,13 +245,15 @@ body {
     min-height: 100vh;
 }
 
+/* App Navbar (Unified Layout) */
 .navbar {
     background-color: var(--bg-surface);
     border-bottom: 1px solid var(--border-color);
-    padding: 12px 24px;
+    padding: 8px 20px;
     display: flex;
     align-items: center;
     justify-content: space-between;
+    gap: 16px;
     position: sticky;
     top: 0;
     z-index: 100;
@@ -259,10 +261,46 @@ body {
     box-sizing: border-box;
 }
 
+.nav-left {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    flex-shrink: 0;
+}
+
+.drawer-toggle-btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 36px;
+    height: 36px;
+    border-radius: var(--radius-sm);
+    background-color: transparent;
+    border: 1px solid transparent;
+    color: var(--text-main);
+    cursor: pointer;
+    font-size: 20px;
+    line-height: 1;
+    transition: var(--transition);
+}
+
+.drawer-toggle-btn:hover {
+    background-color: var(--bg-surface-hover);
+    border-color: var(--border-color);
+    color: var(--primary);
+}
+
 .nav-brand {
     display: flex;
     align-items: center;
     gap: 8px;
+    cursor: pointer;
+    user-select: none;
+    transition: opacity 0.15s ease;
+}
+
+.nav-brand:hover {
+    opacity: 0.85;
 }
 
 .brand-icon {
@@ -286,9 +324,18 @@ body {
     margin-left: 4px;
 }
 
+.nav-center {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 14px;
+    flex: 1;
+    min-width: 0;
+}
+
 .nav-stats {
     display: flex;
-    gap: 12px;
+    gap: 8px;
 }
 
 .stat-badge {
@@ -311,22 +358,286 @@ body {
 .nav-actions {
     display: flex;
     align-items: center;
-    gap: 12px;
+    gap: 10px;
+    flex-shrink: 0;
 }
 
-.user-profile {
-    display: flex;
+.user-profile-btn {
+    display: inline-flex;
     align-items: center;
     gap: 8px;
+    padding: 5px 12px;
+    border-radius: var(--radius-full);
+    background-color: var(--bg-surface-hover);
+    border: 1px solid var(--border-color);
+    color: var(--text-main);
+    font-size: 13px;
+    font-weight: 600;
+    cursor: pointer;
+    transition: var(--transition);
+}
+
+.user-profile-btn:hover {
+    border-color: var(--primary);
+    color: var(--primary);
+    background-color: var(--primary-dim);
+}
+
+.user-avatar-icon {
+    font-size: 15px;
 }
 
 .user-badge {
     font-size: 13px;
-    color: var(--text-muted);
+    color: var(--text-main);
     font-weight: 600;
-    background-color: var(--bg-surface-hover);
-    padding: 4px 10px;
+}
+
+/* -----------------------------------------------------------------------
+   Unified Navigation Drawer (Desktop & Mobile)
+   ----------------------------------------------------------------------- */
+.drawer-backdrop {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100vw;
+    height: 100vh;
+    background-color: rgba(0, 0, 0, 0.65);
+    backdrop-filter: blur(4px);
+    -webkit-backdrop-filter: blur(4px);
+    z-index: 1999;
+    opacity: 0;
+    pointer-events: none;
+    transition: opacity 0.26s cubic-bezier(0.16, 1, 0.3, 1);
+}
+
+.drawer-backdrop.active {
+    opacity: 1;
+    pointer-events: auto;
+}
+
+.app-drawer {
+    position: fixed;
+    top: 0;
+    left: 0;
+    bottom: 0;
+    width: min(340px, 86vw);
+    background-color: var(--bg-surface);
+    border-right: 1px solid var(--border-color);
+    box-shadow: 4px 0 28px rgba(0, 0, 0, 0.5);
+    z-index: 2000;
+    display: flex;
+    flex-direction: column;
+    transform: translateX(-100%);
+    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
+    will-change: transform;
+    overflow-y: auto;
+    -webkit-overflow-scrolling: touch;
+}
+
+.app-drawer.active {
+    transform: translateX(0);
+}
+
+body.drawer-open {
+    overflow: hidden !important;
+}
+
+.drawer-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: calc(16px + env(safe-area-inset-top, 0px)) 16px 14px 18px;
+    border-bottom: 1px solid var(--border-color);
+    background-color: var(--bg-surface);
+    position: sticky;
+    top: 0;
+    z-index: 10;
+}
+
+.drawer-user-card {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    min-width: 0;
+}
+
+.drawer-user-avatar {
+    width: 42px;
+    height: 42px;
+    border-radius: var(--radius-full);
+    background: linear-gradient(135deg, var(--primary), #6366f1);
+    color: #ffffff;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 20px;
+    flex-shrink: 0;
+    box-shadow: var(--shadow-sm);
+}
+
+.drawer-user-info {
+    display: flex;
+    flex-direction: column;
+    min-width: 0;
+}
+
+.drawer-user-name {
+    font-size: 15px;
+    font-weight: 700;
+    color: var(--text-main);
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.drawer-user-desc {
+    font-size: 12px;
+    color: var(--text-muted);
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.drawer-close-btn {
+    width: 34px;
+    height: 34px;
     border-radius: var(--radius-sm);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 18px;
+    color: var(--text-muted);
+    background: transparent;
+    border: none;
+    cursor: pointer;
+    transition: var(--transition);
+}
+
+.drawer-close-btn:hover {
+    background-color: var(--bg-surface-hover);
+    color: var(--text-main);
+}
+
+.drawer-stats-summary {
+    display: grid;
+    grid-template-columns: repeat(3, 1fr);
+    gap: 8px;
+    padding: 12px 14px;
+    margin: 12px 14px 4px 14px;
+    background-color: var(--bg-main);
+    border: 1px solid var(--border-color);
+    border-radius: var(--radius-md);
+    text-align: center;
+}
+
+.drawer-stat-item {
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+}
+
+.drawer-stat-val {
+    font-size: 16px;
+    font-weight: 800;
+    color: var(--text-main);
+}
+
+.drawer-stat-lbl {
+    font-size: 10px;
+    font-weight: 600;
+    color: var(--text-dim);
+    text-transform: uppercase;
+    letter-spacing: 0.3px;
+}
+
+.drawer-nav {
+    flex: 1;
+    padding: 8px 12px;
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+}
+
+.drawer-section-title {
+    font-size: 11px;
+    font-weight: 700;
+    text-transform: uppercase;
+    letter-spacing: 0.6px;
+    color: var(--text-dim);
+    padding: 12px 8px 4px 8px;
+}
+
+.drawer-nav-list {
+    list-style: none;
+    padding: 0;
+    margin: 0;
+    display: flex;
+    flex-direction: column;
+    gap: 3px;
+}
+
+.drawer-nav-item {
+    width: 100%;
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    padding: 10px 12px;
+    border-radius: var(--radius-sm);
+    background: transparent;
+    border: 1px solid transparent;
+    color: var(--text-main);
+    font-size: 14px;
+    font-weight: 500;
+    text-align: left;
+    cursor: pointer;
+    transition: var(--transition);
+    text-decoration: none;
+}
+
+.drawer-nav-item:hover {
+    background-color: var(--bg-surface-hover);
+    color: var(--primary);
+    border-color: var(--border-color);
+}
+
+.drawer-nav-item.active {
+    background-color: var(--primary-dim);
+    color: var(--primary);
+    border-color: rgba(56, 189, 248, 0.3);
+    font-weight: 700;
+}
+
+.drawer-item-icon {
+    font-size: 18px;
+    width: 24px;
+    text-align: center;
+    flex-shrink: 0;
+}
+
+.drawer-item-label {
+    flex: 1;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.drawer-badge {
+    padding: 2px 7px;
+    font-size: 11px;
+    font-weight: 700;
+    border-radius: var(--radius-full);
+    background-color: var(--primary);
+    color: #0f172a;
+    line-height: 1.2;
+}
+
+.drawer-footer {
+    padding: 14px 16px calc(14px + env(safe-area-inset-bottom, 0px)) 16px;
+    border-top: 1px solid var(--border-color);
+    font-size: 12px;
+    color: var(--text-dim);
+    text-align: center;
 }
 
 /* Buttons */
@@ -2493,27 +2804,35 @@ body {
         padding-bottom: calc(74px + env(safe-area-inset-bottom, 0px)) !important;
     }
 
-    /* 3. Header & Navigation: Clean iOS App Header */
+    /* 3. Header & Navigation: Unified Responsive Header */
     .navbar {
-        padding: calc(8px + env(safe-area-inset-top, 0px)) 12px 8px 12px;
-        position: sticky;
-        top: 0;
+        padding: calc(8px + env(safe-area-inset-top, 0px)) 10px 8px 10px;
+        gap: 8px;
     }
 
     .brand-sub,
-    .nav-center,
-    .nav-actions #nav-reader-btn,
-    .nav-actions #srs-trainer-btn,
-    .nav-actions #stats-open-btn,
-    .nav-actions #export-open-btn,
-    .nav-actions .user-profile {
+    .nav-stats {
         display: none !important;
     }
 
-    .mobile-only-btn {
-        display: inline-flex !important;
-        align-items: center;
-        justify-content: center;
+    .btn-trainer .trainer-text {
+        display: none !important;
+    }
+
+    .btn-trainer {
+        padding: 6px 10px !important;
+        font-size: 13px !important;
+        min-height: 36px;
+    }
+
+    .user-profile-btn #user-display-name {
+        display: none !important;
+    }
+
+    .user-profile-btn {
+        padding: 6px 10px !important;
+        border-radius: var(--radius-sm);
+        min-height: 36px;
     }
 
     .mobile-tab-bar {
diff --git a/app/static/index.html b/app/static/index.html
index 1d8da05..5b56d6d 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -52,48 +52,37 @@
     <!-- Main Application Shell -->
     <div id="app-shell" class="app-shell hidden">
         <!-- Top Navigation Bar -->
-        <header class="navbar">
-            <div class="nav-brand" id="nav-brand-home" title="На главную">
-                <span class="brand-icon">📖</span>
-                <span class="brand-title">Notes</span>
-                <span class="brand-sub">English Lexicon</span>
+        <header class="navbar" id="main-navbar">
+            <div class="nav-left">
+                <button id="drawer-toggle-btn" class="icon-btn drawer-toggle-btn" title="Меню навигации (☰)" aria-label="Открыть меню">
+                    <span class="hamburger-icon">☰</span>
+                </button>
+                <div class="nav-brand" id="nav-brand-home" title="На главную (Словарь)">
+                    <span class="brand-icon">📖</span>
+                    <span class="brand-title">Notes</span>
+                    <span class="brand-sub">English Lexicon</span>
+                </div>
             </div>
 
             <div class="nav-center">
+                <button id="srs-trainer-btn" class="btn btn-trainer" title="Интервальный тренажер SRS (повторение слов)">
+                    <span class="trainer-icon">🎓</span>
+                    <span class="trainer-text">Тренажёр SRS</span>
+                    <span id="srs-badge" class="srs-due-badge">0</span>
+                </button>
                 <div class="nav-stats" id="nav-stats">
                     <span class="stat-badge" title="Всего слов в словаре">Всего: <strong id="stat-total">0</strong></span>
                     <span class="stat-badge stat-today" title="Добавлено сегодня">Сегодня: <strong id="stat-today">+0</strong></span>
                 </div>
             </div>
 
-            <div class="nav-actions">
-                <button id="nav-reader-btn" class="btn btn-outline btn-sm" title="Интерактивная читалка и библиотека книг">
-                    <span>📚 Читалка</span>
-                </button>
-                <button id="nav-cefr-btn" class="btn btn-outline btn-sm" title="Уровневые тесты CEFR (A1, A2, B1, B2)">
-                    <span>🎯 Тесты CEFR</span>
-                </button>
-                <button id="nav-grammar-btn" class="btn btn-outline btn-sm" title="Оффлайн-грамматика Мерфи и бумажная тетрадь">
-                    <span>📖 Грамматика</span>
-                </button>
-                <button id="srs-trainer-btn" class="btn btn-trainer" title="Интервальный тренажер (Flashcards, 4 варианта, диктант, ввод)">
-                    <span class="trainer-icon">🎓</span>
-                    <span class="trainer-text">Тренажёр SRS</span>
-                    <span id="srs-badge" class="srs-due-badge">0</span>
-                </button>
-                <button id="stats-open-btn" class="btn btn-outline btn-sm stat-open-btn" title="Календарь активности и статистика">
-                    <span>📊 Статистика</span>
-                </button>
-                <button id="export-open-btn" class="btn btn-outline btn-sm" title="Экспорт словаря">
-                    <span>📤 Экспорт</span>
-                </button>
+            <div class="nav-actions nav-right">
                 <button id="theme-toggle" class="icon-btn" title="Переключить тему">🌓</button>
-                <button id="mobile-menu-toggle-btn" class="icon-btn mobile-only-btn" title="Меню профиля и настроек">⚙️</button>
-                <div class="user-profile">
+                <button id="nav-user-profile-btn" class="user-profile-btn" title="Меню профиля и настройки">
+                    <span class="user-avatar-icon">👤</span>
                     <span id="user-display-name" class="user-badge">user</span>
-                    <button id="change-pwd-open-btn" class="btn btn-sm btn-outline" title="Сменить пароль">🔑 Пароль</button>
-                    <button id="logout-btn" class="btn btn-sm btn-outline" title="Выйти из аккаунта">Выход</button>
-                </div>
+                </button>
+                <button id="logout-btn" class="hidden" style="display: none;" title="Выйти из аккаунта"></button>
             </div>
         </header>
 
@@ -881,7 +870,7 @@
             </div>
         </div>
 
-        <!-- Mobile Bottom Navigation Tab Bar (iOS style) -->
+        <!-- Mobile Bottom Navigation Tab Bar (iOS style, 4 core tabs) -->
         <nav class="mobile-tab-bar" id="mobile-tab-bar">
             <button class="tab-item active" data-view="dictionary-view" id="tab-nav-dict">
                 <span class="tab-icon">📖</span>
@@ -896,44 +885,125 @@
                 <span class="tab-icon">📚</span>
                 <span class="tab-label">Читалка</span>
             </button>
-            <button class="tab-item" id="tab-nav-stats">
-                <span class="tab-icon">📊</span>
-                <span class="tab-label">Прогресс</span>
-            </button>
             <button class="tab-item" id="tab-nav-menu">
-                <span class="tab-icon">⚙️</span>
+                <span class="tab-icon">☰</span>
                 <span class="tab-label">Меню</span>
             </button>
         </nav>
     </div>
 
-    <!-- Mobile Menu / Profile Sheet Modal -->
-    <div id="mobile-menu-modal" class="modal-backdrop hidden">
-        <div class="modal-window mobile-sheet-window">
-            <div class="modal-header">
-                <h3>⚙️ Профиль & Меню</h3>
-                <button class="modal-close-btn" id="mobile-menu-close-btn">✕</button>
+    <!-- Navigation Drawer (Unified Side Drawer for Desktop & Mobile) -->
+    <div id="app-drawer-backdrop" class="drawer-backdrop hidden" aria-hidden="true"></div>
+    <aside id="app-drawer" class="app-drawer" aria-label="Боковое меню навигации">
+        <div class="drawer-header">
+            <div class="drawer-user-card" id="drawer-user-card">
+                <div class="drawer-user-avatar">👤</div>
+                <div class="drawer-user-info">
+                    <strong id="drawer-user-name" class="drawer-user-name">user</strong>
+                    <span class="drawer-user-desc">Личный словарь English Lexicon</span>
+                </div>
             </div>
-            <div class="modal-body mobile-menu-body">
-                <div class="mobile-user-card">
-                    <span class="mobile-user-avatar">👤</span>
-                    <div class="mobile-user-info">
-                        <strong id="mobile-user-name">user</strong>
-                        <p class="subtitle">Личный словарь English Lexicon</p>
-                    </div>
-                </div>
-                <div class="mobile-menu-actions">
-                    <button id="mobile-grammar-btn" class="btn btn-outline btn-block">📖 Грамматика Мерфи & Тетрадь</button>
-                    <button id="mobile-cefr-btn" class="btn btn-outline btn-block">🎯 Уровневые тесты CEFR (A1–B2)</button>
-                    <button id="mobile-stats-btn" class="btn btn-outline btn-block">📊 Статистика & Календарь</button>
-                    <button id="mobile-export-btn" class="btn btn-outline btn-block">📤 Экспорт словаря</button>
-                    <button id="mobile-pwd-btn" class="btn btn-outline btn-block">🔑 Сменить пароль</button>
-                    <button id="mobile-theme-btn" class="btn btn-outline btn-block">🌓 Переключить тему</button>
-                    <button id="mobile-logout-btn" class="btn btn-danger btn-block">Выйти из аккаунта</button>
-                </div>
+            <button id="app-drawer-close-btn" class="icon-btn drawer-close-btn" title="Закрыть меню (Esc)" aria-label="Закрыть">✕</button>
+        </div>
+
+        <!-- Quick Stats in Drawer -->
+        <div class="drawer-stats-summary" id="drawer-stats-summary">
+            <div class="drawer-stat-item">
+                <span class="drawer-stat-val" id="drawer-stat-total">0</span>
+                <span class="drawer-stat-lbl">Слов в базе</span>
+            </div>
+            <div class="drawer-stat-item">
+                <span class="drawer-stat-val text-success" id="drawer-stat-today">+0</span>
+                <span class="drawer-stat-lbl">Сегодня</span>
+            </div>
+            <div class="drawer-stat-item">
+                <span class="drawer-stat-val text-warning" id="drawer-stat-due">0</span>
+                <span class="drawer-stat-lbl">Повторение</span>
             </div>
         </div>
-    </div>
+
+        <nav class="drawer-nav">
+            <!-- Section 1: Study & Reading -->
+            <div class="drawer-section-title">Обучение & Чтение</div>
+            <ul class="drawer-nav-list">
+                <li>
+                    <button class="drawer-nav-item active" data-hash="#dictionary" id="drawer-nav-dict">
+                        <span class="drawer-item-icon">📖</span>
+                        <span class="drawer-item-label">Словарь & Поиск</span>
+                    </button>
+                </li>
+                <li>
+                    <button class="drawer-nav-item" data-hash="#srs" id="drawer-nav-srs">
+                        <span class="drawer-item-icon">🎓</span>
+                        <span class="drawer-item-label">Тренажёр SRS</span>
+                        <span id="drawer-srs-badge" class="drawer-badge hidden">0</span>
+                    </button>
+                </li>
+                <li>
+                    <button class="drawer-nav-item" data-hash="#reader" id="drawer-nav-reader">
+                        <span class="drawer-item-icon">📚</span>
+                        <span class="drawer-item-label">Интерактивная читалка & Книги</span>
+                    </button>
+                </li>
+                <li>
+                    <button class="drawer-nav-item" data-hash="#cefr" id="drawer-nav-cefr">
+                        <span class="drawer-item-icon">🎯</span>
+                        <span class="drawer-item-label">Уровневые тесты CEFR (A1–B2)</span>
+                    </button>
+                </li>
+                <li>
+                    <button class="drawer-nav-item" data-hash="#grammar" id="drawer-nav-grammar">
+                        <span class="drawer-item-icon">📘</span>
+                        <span class="drawer-item-label">Грамматика Мерфи & Тетрадь</span>
+                    </button>
+                </li>
+            </ul>
+
+            <!-- Section 2: Analytics & Progress -->
+            <div class="drawer-section-title">Аналитика</div>
+            <ul class="drawer-nav-list">
+                <li>
+                    <button class="drawer-nav-item" id="drawer-nav-stats">
+                        <span class="drawer-item-icon">📊</span>
+                        <span class="drawer-item-label">Календарь активности & Статистика</span>
+                    </button>
+                </li>
+            </ul>
+
+            <!-- Section 3: Profile & Settings -->
+            <div class="drawer-section-title">Настройки & Профиль</div>
+            <ul class="drawer-nav-list">
+                <li>
+                    <button class="drawer-nav-item" id="drawer-nav-export">
+                        <span class="drawer-item-icon">📤</span>
+                        <span class="drawer-item-label">Экспорт словаря (JSON / CSV / TXT)</span>
+                    </button>
+                </li>
+                <li>
+                    <button class="drawer-nav-item" id="drawer-nav-pwd">
+                        <span class="drawer-item-icon">🔑</span>
+                        <span class="drawer-item-label">Сменить пароль</span>
+                    </button>
+                </li>
+                <li>
+                    <button class="drawer-nav-item" id="drawer-nav-theme">
+                        <span class="drawer-item-icon">🌓</span>
+                        <span class="drawer-item-label">Переключить тему оформления</span>
+                    </button>
+                </li>
+                <li>
+                    <button class="drawer-nav-item text-danger" id="drawer-nav-logout">
+                        <span class="drawer-item-icon">🚪</span>
+                        <span class="drawer-item-label">Выйти из аккаунта</span>
+                    </button>
+                </li>
+            </ul>
+        </nav>
+
+        <div class="drawer-footer">
+            <span class="drawer-footer-text">study.qpid.pro • v5.7 PWA</span>
+        </div>
+    </aside>
 
     <!-- Analytics & Activity Heatmap Modal -->
     <div id="stats-modal" class="modal-backdrop hidden">
diff --git a/app/static/js/app.js b/app/static/js/app.js
index 1fe2184..8e5520f 100644
--- a/app/static/js/app.js
+++ b/app/static/js/app.js
@@ -15,15 +15,45 @@ let currentUser = null;
 let isRouting = false;
 
 // -----------------------------------------------------------------------
-// Mobile Navigation Active Tab
+// Unified Navigation & Drawer Active State
 // -----------------------------------------------------------------------
-export function updateMobileActiveTab(tabName) {
+export function updateActiveNavState(viewName) {
+    // 1. Mobile bottom tab bar
     document.querySelectorAll('.mobile-tab-bar .tab-item').forEach(btn => {
         btn.classList.remove('active');
     });
-    if (!tabName) return;
-    const target = document.getElementById(`tab-nav-${tabName}`);
-    if (target) target.classList.add('active');
+    if (viewName === 'dict' || viewName === 'dictionary') {
+        const t = document.getElementById('tab-nav-dict');
+        if (t) t.classList.add('active');
+    } else if (viewName === 'srs') {
+        const t = document.getElementById('tab-nav-srs');
+        if (t) t.classList.add('active');
+    } else if (viewName === 'reader') {
+        const t = document.getElementById('tab-nav-reader');
+        if (t) t.classList.add('active');
+    }
+
+    // 2. Drawer nav items
+    document.querySelectorAll('.drawer-nav-item').forEach(btn => {
+        btn.classList.remove('active');
+    });
+    const drawerMap = {
+        'dict': 'drawer-nav-dict',
+        'dictionary': 'drawer-nav-dict',
+        'srs': 'drawer-nav-srs',
+        'reader': 'drawer-nav-reader',
+        'cefr': 'drawer-nav-cefr',
+        'grammar': 'drawer-nav-grammar',
+    };
+    const targetId = drawerMap[viewName];
+    if (targetId) {
+        const dBtn = document.getElementById(targetId);
+        if (dBtn) dBtn.classList.add('active');
+    }
+}
+
+export function updateMobileActiveTab(tabName) {
+    updateActiveNavState(tabName);
 }
 
 // -----------------------------------------------------------------------
@@ -62,7 +92,7 @@ export function applyInitialViewPreflight() {
         if (cefrView) cefrView.classList.add('hidden');
         if (grammarView) grammarView.classList.add('hidden');
         if (readerView) readerView.classList.remove('hidden');
-        updateMobileActiveTab('reader');
+        updateActiveNavState('reader');
         if (hash.includes('/book/')) {
             if (bookshelfContainer) bookshelfContainer.classList.add('hidden');
             if (readerInterface) readerInterface.classList.remove('hidden');
@@ -74,21 +104,21 @@ export function applyInitialViewPreflight() {
         if (cefrView) cefrView.classList.add('hidden');
         if (grammarView) grammarView.classList.add('hidden');
         if (srsView) srsView.classList.remove('hidden');
-        updateMobileActiveTab('srs');
+        updateActiveNavState('srs');
     } else if (hash.startsWith('#cefr')) {
         if (dictionaryView) dictionaryView.classList.add('hidden');
         if (readerView) readerView.classList.add('hidden');
         if (srsView) srsView.classList.add('hidden');
         if (grammarView) grammarView.classList.add('hidden');
         if (cefrView) cefrView.classList.remove('hidden');
-        updateMobileActiveTab('');
+        updateActiveNavState('cefr');
     } else if (hash.startsWith('#grammar')) {
         if (dictionaryView) dictionaryView.classList.add('hidden');
         if (readerView) readerView.classList.add('hidden');
         if (srsView) srsView.classList.add('hidden');
         if (cefrView) cefrView.classList.add('hidden');
         if (grammarView) grammarView.classList.remove('hidden');
-        updateMobileActiveTab('');
+        updateActiveNavState('grammar');
     }
 }
 
@@ -111,7 +141,7 @@ export function openDictionaryView(updateHash = true) {
     if (cefrView) cefrView.classList.add('hidden');
     if (grammarView) grammarView.classList.add('hidden');
     if (dictionaryView) dictionaryView.classList.remove('hidden');
-    updateMobileActiveTab('dict');
+    updateActiveNavState('dict');
     try { localStorage.setItem('notes_active_view', 'dictionary-view'); } catch (e) {}
     loadInitialData();
 }
@@ -133,7 +163,7 @@ export function openSrsView(tagFilter = null, updateHash = true) {
     if (cefrView) cefrView.classList.add('hidden');
     if (grammarView) grammarView.classList.add('hidden');
     if (srsView) srsView.classList.remove('hidden');
-    updateMobileActiveTab('srs');
+    updateActiveNavState('srs');
     try { localStorage.setItem('notes_active_view', 'srs-view'); } catch (e) {}
     startSrsTrainingSession(false, tagFilter);
 }
@@ -162,7 +192,7 @@ export function openBookshelfView(updateHash = true) {
     if (readerView) readerView.classList.remove('hidden');
     if (bookshelfContainer) bookshelfContainer.classList.remove('hidden');
     if (readerInterface) readerInterface.classList.add('hidden');
-    updateMobileActiveTab('reader');
+    updateActiveNavState('reader');
     try {
         localStorage.setItem('notes_active_view', 'reader-view');
         localStorage.removeItem('notes_active_book_id');
@@ -201,7 +231,7 @@ export function openCefrView(level = null, mode = 'all', updateHash = true) {
     if (grammarView) grammarView.classList.add('hidden');
     if (cefrView) cefrView.classList.remove('hidden');
 
-    updateMobileActiveTab('');
+    updateActiveNavState('cefr');
     try { localStorage.setItem('notes_active_view', 'cefr-view'); } catch (e) {}
 
     if (level) {
@@ -231,7 +261,7 @@ export function openGrammarView(unitId = null, updateHash = true) {
     if (cefrView) cefrView.classList.add('hidden');
     if (grammarView) grammarView.classList.remove('hidden');
 
-    updateMobileActiveTab('');
+    updateActiveNavState('grammar');
     try { localStorage.setItem('notes_active_view', 'grammar-view'); } catch (e) {}
 
     if (unitId) {
@@ -349,122 +379,176 @@ export function showApp() {
     const loginOverlay = document.getElementById('login-overlay');
     const appShell = document.getElementById('app-shell');
     const userDisplayName = document.getElementById('user-display-name');
+    const drawerUserName = document.getElementById('drawer-user-name');
     const mobileUserName = document.getElementById('mobile-user-name');
 
     if (loginOverlay) loginOverlay.classList.add('hidden');
     if (appShell) appShell.classList.remove('hidden');
     const name = currentUser ? currentUser.username : 'user';
     if (userDisplayName) userDisplayName.textContent = name;
+    if (drawerUserName) drawerUserName.textContent = name;
     if (mobileUserName) mobileUserName.textContent = name;
 }
 
 // -----------------------------------------------------------------------
-// Mobile Navigation & Drawer
+// Unified Navigation Drawer Controller (Desktop & Mobile)
 // -----------------------------------------------------------------------
-function initMobileNavigation() {
+export function initNavigationDrawer() {
+    const drawerBackdrop = document.getElementById('app-drawer-backdrop');
+    const drawer = document.getElementById('app-drawer');
+    const drawerToggleBtn = document.getElementById('drawer-toggle-btn');
+    const drawerCloseBtn = document.getElementById('app-drawer-close-btn');
+    const navUserProfileBtn = document.getElementById('nav-user-profile-btn');
+    const tabMenu = document.getElementById('tab-nav-menu');
+
+    // Bottom tab items
     const tabDict = document.getElementById('tab-nav-dict');
     const tabSrs = document.getElementById('tab-nav-srs');
     const tabReader = document.getElementById('tab-nav-reader');
-    const tabStats = document.getElementById('tab-nav-stats');
-    const tabMenu = document.getElementById('tab-nav-menu');
 
-    const mobileMenuModal = document.getElementById('mobile-menu-modal');
-    const mobileMenuToggleBtn = document.getElementById('mobile-menu-toggle-btn');
-    const mobileMenuCloseBtn = document.getElementById('mobile-menu-close-btn');
-
-    const mobileStatsBtn = document.getElementById('mobile-stats-btn');
-    const mobileExportBtn = document.getElementById('mobile-export-btn');
-    const mobilePwdBtn = document.getElementById('mobile-pwd-btn');
-    const mobileThemeBtn = document.getElementById('mobile-theme-btn');
-    const mobileLogoutBtn = document.getElementById('mobile-logout-btn');
+    // Drawer nav buttons
+    const drawerNavDict = document.getElementById('drawer-nav-dict');
+    const drawerNavSrs = document.getElementById('drawer-nav-srs');
+    const drawerNavReader = document.getElementById('drawer-nav-reader');
+    const drawerNavCefr = document.getElementById('drawer-nav-cefr');
+    const drawerNavGrammar = document.getElementById('drawer-nav-grammar');
+    const drawerNavStats = document.getElementById('drawer-nav-stats');
+    const drawerNavExport = document.getElementById('drawer-nav-export');
+    const drawerNavPwd = document.getElementById('drawer-nav-pwd');
+    const drawerNavTheme = document.getElementById('drawer-nav-theme');
+    const drawerNavLogout = document.getElementById('drawer-nav-logout');
 
     const exportModal = document.getElementById('export-modal');
     const changePasswordModal = document.getElementById('change-password-modal');
     const themeToggle = document.getElementById('theme-toggle');
     const logoutBtn = document.getElementById('logout-btn');
 
+    function openDrawer() {
+        if (!drawer || !drawerBackdrop) return;
+        const drawerUserName = document.getElementById('drawer-user-name');
+        if (drawerUserName && currentUser) {
+            drawerUserName.textContent = currentUser.username;
+        }
+        drawerBackdrop.classList.remove('hidden');
+        // Force reflow for animation
+        void drawerBackdrop.offsetWidth;
+        drawerBackdrop.classList.add('active');
+        drawer.classList.add('active');
+        document.body.classList.add('drawer-open');
+    }
+
+    function closeDrawer() {
+        if (!drawer || !drawerBackdrop) return;
+        drawer.classList.remove('active');
+        drawerBackdrop.classList.remove('active');
+        document.body.classList.remove('drawer-open');
+        setTimeout(() => {
+            if (!drawer.classList.contains('active')) {
+                drawerBackdrop.classList.add('hidden');
+            }
+        }, 280);
+    }
+
+    // Opening Triggers
+    if (drawerToggleBtn) drawerToggleBtn.addEventListener('click', openDrawer);
+    if (navUserProfileBtn) navUserProfileBtn.addEventListener('click', openDrawer);
+    if (tabMenu) tabMenu.addEventListener('click', openDrawer);
+
+    // Closing Triggers
+    if (drawerCloseBtn) drawerCloseBtn.addEventListener('click', closeDrawer);
+    if (drawerBackdrop) drawerBackdrop.addEventListener('click', closeDrawer);
+
+    // Escape Key Support
+    document.addEventListener('keydown', (e) => {
+        if (e.key === 'Escape' && drawer && drawer.classList.contains('active')) {
+            closeDrawer();
+        }
+    });
+
+    // Touch Swipe Left to Dismiss (Mobile & Tablet)
+    let touchStartX = 0;
+    let touchCurrentX = 0;
+    if (drawer) {
+        drawer.addEventListener('touchstart', (e) => {
+            touchStartX = e.touches[0].clientX;
+            touchCurrentX = touchStartX;
+        }, { passive: true });
+
+        drawer.addEventListener('touchmove', (e) => {
+            touchCurrentX = e.touches[0].clientX;
+        }, { passive: true });
+
+        drawer.addEventListener('touchend', () => {
+            if (touchStartX - touchCurrentX > 60 && touchCurrentX > 0) {
+                closeDrawer();
+            }
+            touchStartX = 0;
+            touchCurrentX = 0;
+        });
+    }
+
+    // Bottom Tab Items
     if (tabDict) tabDict.addEventListener('click', () => { window.location.hash = '#dictionary'; });
     if (tabSrs) tabSrs.addEventListener('click', () => { window.location.hash = '#srs'; });
     if (tabReader) tabReader.addEventListener('click', () => { window.location.hash = '#reader'; });
 
-    if (tabStats) {
-        tabStats.addEventListener('click', () => {
+    // Drawer Navigation Actions
+    if (drawerNavDict) {
+        drawerNavDict.addEventListener('click', () => {
+            closeDrawer();
+            window.location.hash = '#dictionary';
+        });
+    }
+    if (drawerNavSrs) {
+        drawerNavSrs.addEventListener('click', () => {
+            closeDrawer();
+            window.location.hash = '#srs';
+        });
+    }
+    if (drawerNavReader) {
+        drawerNavReader.addEventListener('click', () => {
+            closeDrawer();
+            window.location.hash = '#reader';
+        });
+    }
+    if (drawerNavCefr) {
+        drawerNavCefr.addEventListener('click', () => {
+            closeDrawer();
+            window.location.hash = '#cefr';
+        });
+    }
+    if (drawerNavGrammar) {
+        drawerNavGrammar.addEventListener('click', () => {
+            closeDrawer();
+            window.location.hash = '#grammar';
+        });
+    }
+    if (drawerNavStats) {
+        drawerNavStats.addEventListener('click', () => {
+            closeDrawer();
             openStatsDashboard();
         });
     }
-
-    function openMobileMenu() {
-        if (mobileMenuModal) {
-            const mobileUserName = document.getElementById('mobile-user-name');
-            if (mobileUserName && currentUser) {
-                mobileUserName.textContent = currentUser.username;
-            }
-            openModal(mobileMenuModal);
-        }
-    }
-
-    function closeMobileMenu() {
-        if (mobileMenuModal) {
-            closeModal(mobileMenuModal);
-        }
-    }
-
-    if (tabMenu) tabMenu.addEventListener('click', openMobileMenu);
-    if (mobileMenuToggleBtn) mobileMenuToggleBtn.addEventListener('click', openMobileMenu);
-    if (mobileMenuCloseBtn) mobileMenuCloseBtn.addEventListener('click', closeMobileMenu);
-
-    if (mobileMenuModal) {
-        mobileMenuModal.addEventListener('click', (e) => {
-            if (e.target === mobileMenuModal) closeMobileMenu();
-        });
-    }
-
-    const mobileGrammarBtn = document.getElementById('mobile-grammar-btn');
-    if (mobileGrammarBtn) {
-        mobileGrammarBtn.addEventListener('click', () => {
-            closeMobileMenu();
-            openGrammarView(null, true);
-        });
-    }
-
-    const mobileCefrBtn = document.getElementById('mobile-cefr-btn');
-    if (mobileCefrBtn) {
-        mobileCefrBtn.addEventListener('click', () => {
-            closeMobileMenu();
-            openCefrView(null, 'all', true);
-        });
-    }
-
-    if (mobileStatsBtn) {
-        mobileStatsBtn.addEventListener('click', () => {
-            closeMobileMenu();
-            openStatsDashboard();
-        });
-    }
-
-    if (mobileExportBtn && exportModal) {
-        mobileExportBtn.addEventListener('click', () => {
-            closeMobileMenu();
+    if (drawerNavExport && exportModal) {
+        drawerNavExport.addEventListener('click', () => {
+            closeDrawer();
             openModal(exportModal);
         });
     }
-
-    if (mobilePwdBtn && changePasswordModal) {
-        mobilePwdBtn.addEventListener('click', () => {
-            closeMobileMenu();
+    if (drawerNavPwd && changePasswordModal) {
+        drawerNavPwd.addEventListener('click', () => {
+            closeDrawer();
             openModal(changePasswordModal);
         });
     }
-
-    if (mobileThemeBtn && themeToggle) {
-        mobileThemeBtn.addEventListener('click', () => {
+    if (drawerNavTheme && themeToggle) {
+        drawerNavTheme.addEventListener('click', () => {
             themeToggle.click();
         });
     }
-
-    if (mobileLogoutBtn && logoutBtn) {
-        mobileLogoutBtn.addEventListener('click', () => {
-            closeMobileMenu();
+    if (drawerNavLogout && logoutBtn) {
+        drawerNavLogout.addEventListener('click', () => {
+            closeDrawer();
             logoutBtn.click();
         });
     }
@@ -605,8 +689,8 @@ document.addEventListener('DOMContentLoaded', () => {
         srsJumpCefrBtn.addEventListener('click', () => { window.location.hash = '#cefr'; });
     }
 
-    // 6. Mobile Tab Bar & Drawer
-    initMobileNavigation();
+    // 6. Navigation Drawer & Mobile Tab Bar
+    initNavigationDrawer();
 
     // 7. Change Password Modal
     initChangePasswordModal();
diff --git a/app/static/js/modules/dictionary.js b/app/static/js/modules/dictionary.js
index 4932a7d..0c6a127 100644
--- a/app/static/js/modules/dictionary.js
+++ b/app/static/js/modules/dictionary.js
@@ -96,6 +96,7 @@ export function initDictionary() {
     const moveColConfirmBtn = document.getElementById('move-col-confirm-btn');
 
     const exportOpenBtn = document.getElementById('export-open-btn');
+    const drawerNavExport = document.getElementById('drawer-nav-export');
     const exportModal = document.getElementById('export-modal');
     const closeExportModalBtn = document.getElementById('close-export-modal-btn');
     const exportCancelBtn = document.getElementById('export-cancel-btn');
@@ -556,6 +557,9 @@ export function initDictionary() {
     if (exportOpenBtn) {
         exportOpenBtn.addEventListener('click', () => openModal(exportModal));
     }
+    if (drawerNavExport) {
+        drawerNavExport.addEventListener('click', () => openModal(exportModal));
+    }
     closeExportModalBtn.addEventListener('click', () => closeModal(exportModal));
     exportCancelBtn.addEventListener('click', () => closeModal(exportModal));
 
@@ -687,12 +691,22 @@ export function initDictionary() {
             if (stats) {
                 const due = stats.due_cards || 0;
                 const srsBadge = document.getElementById('srs-badge');
-                if (srsBadge) srsBadge.textContent = due;
+                if (srsBadge) {
+                    srsBadge.textContent = due;
+                    srsBadge.style.display = due > 0 ? 'inline-block' : 'none';
+                }
                 const tabSrsBadge = document.getElementById('tab-srs-badge');
                 if (tabSrsBadge) {
                     tabSrsBadge.textContent = due;
                     tabSrsBadge.classList.toggle('hidden', due === 0);
                 }
+                const drawerSrsBadge = document.getElementById('drawer-srs-badge');
+                if (drawerSrsBadge) {
+                    drawerSrsBadge.textContent = due;
+                    drawerSrsBadge.classList.toggle('hidden', due === 0);
+                }
+                const drawerStatDue = document.getElementById('drawer-stat-due');
+                if (drawerStatDue) drawerStatDue.textContent = due;
             }
         } catch (e) {}
     }
diff --git a/app/static/js/modules/srs.js b/app/static/js/modules/srs.js
index a662d84..74523ec 100644
--- a/app/static/js/modules/srs.js
+++ b/app/static/js/modules/srs.js
@@ -115,6 +115,7 @@ export function initSrs() {
     // Stats & Heatmap Modal
     const statsOpenBtn = document.getElementById('stats-open-btn');
     const mobileStatsBtn = document.getElementById('mobile-stats-btn');
+    const drawerNavStats = document.getElementById('drawer-nav-stats');
     const statsModal = document.getElementById('stats-modal');
     const closeStatsModalBtn = document.getElementById('close-stats-modal-btn');
     const closeStatsBtn = document.getElementById('close-stats-btn');
@@ -646,6 +647,7 @@ export function initSrs() {
     // -----------------------------------------------------------------------
     if (statsOpenBtn) statsOpenBtn.addEventListener('click', openStatsDashboard);
     if (mobileStatsBtn) mobileStatsBtn.addEventListener('click', openStatsDashboard);
+    if (drawerNavStats) drawerNavStats.addEventListener('click', openStatsDashboard);
     closeStatsModalBtn.addEventListener('click', () => closeModal(statsModal));
     closeStatsBtn.addEventListener('click', () => closeModal(statsModal));
 
diff --git a/app/static/js/modules/ui.js b/app/static/js/modules/ui.js
index 7af4d54..393e237 100644
--- a/app/static/js/modules/ui.js
+++ b/app/static/js/modules/ui.js
@@ -139,13 +139,32 @@ export function updateHeaderStats(total = 0, today = 0, srsCount = 0) {
     const statTotal = document.getElementById('stat-total');
     const statToday = document.getElementById('stat-today');
     const srsBadge = document.getElementById('srs-badge');
+    const tabSrsBadge = document.getElementById('tab-srs-badge');
+    const drawerSrsBadge = document.getElementById('drawer-srs-badge');
+    const drawerStatTotal = document.getElementById('drawer-stat-total');
+    const drawerStatToday = document.getElementById('drawer-stat-today');
+    const drawerStatDue = document.getElementById('drawer-stat-due');
+
+    const formattedToday = today > 0 ? `+${today}` : today;
 
     if (statTotal) statTotal.textContent = total;
-    if (statToday) statToday.textContent = today;
+    if (statToday) statToday.textContent = formattedToday;
+    if (drawerStatTotal) drawerStatTotal.textContent = total;
+    if (drawerStatToday) drawerStatToday.textContent = formattedToday;
+    if (drawerStatDue) drawerStatDue.textContent = srsCount;
+
     if (srsBadge) {
         srsBadge.textContent = srsCount;
         srsBadge.style.display = srsCount > 0 ? 'inline-block' : 'none';
     }
+    if (tabSrsBadge) {
+        tabSrsBadge.textContent = srsCount;
+        tabSrsBadge.classList.toggle('hidden', srsCount === 0);
+    }
+    if (drawerSrsBadge) {
+        drawerSrsBadge.textContent = srsCount;
+        drawerSrsBadge.classList.toggle('hidden', srsCount === 0);
+    }
 }
 
 // -----------------------------------------------------------------------
diff --git a/app/static/sw.js b/app/static/sw.js
index 4abd4bb..b6493f7 100644
--- a/app/static/sw.js
+++ b/app/static/sw.js
@@ -1,7 +1,7 @@
 // Service Worker for Notes English PWA (Stage 2)
 // Strategy: Cache-first for static assets, Network-first for API calls.
 
-const CACHE_NAME = 'notes-v5.6';
+const CACHE_NAME = 'notes-v5.7';
 const OFFLINE_URL = '/';
 
 const PRECACHE_URLS = [