edit_codex

2026-03-08 22:07:04 +03:00
parent f50c918f10
commit 7393230696
28 changed files with 1686 additions and 1117 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -360,4 +360,5 @@ MigrationBackup/
 .ionide/

 # Fody - auto-generated XML schema
-FodyWeavers.xsd
+FodyWeavers.xsd
+.dotnet-cli/
--- a/BookReader/AppShell.xaml
+++ b/BookReader/AppShell.xaml
@@ -1,16 +1,32 @@
-<?xml version="1.0" encoding="UTF-8" ?>
+<?xml version="1.0" encoding="UTF-8" ?>
 <Shell xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:views="clr-namespace:BookReader.Views"
       x:Class="BookReader.AppShell"
       Shell.FlyoutBehavior="Disabled"
-       Shell.BackgroundColor="#3E2723"
+       Shell.NavBarHasShadow="False"
+       Shell.BackgroundColor="{StaticResource TabBarColor}"
       Shell.ForegroundColor="White"
-       Shell.TitleColor="White">
+       Shell.TitleColor="White"
+       Shell.TabBarBackgroundColor="{StaticResource TabBarColor}"
+       Shell.TabBarForegroundColor="#D9C3B4"
+       Shell.TabBarTitleColor="#D9C3B4"
+       Shell.TabBarUnselectedColor="#8B7264">

-    <ShellContent
-        Title="Library"
-        ContentTemplate="{DataTemplate views:BookshelfPage}"
-        Route="bookshelf" />
+    <TabBar>
+        <Tab Title="Библиотека" Icon="library_tab.svg">
+            <ShellContent ContentTemplate="{DataTemplate views:BookshelfPage}"
+                          Route="bookshelf" />
+        </Tab>

-</Shell>
+        <Tab Title="Calibre" Icon="cloud_tab.svg">
+            <ShellContent ContentTemplate="{DataTemplate views:CalibreLibraryPage}"
+                          Route="calibre" />
+        </Tab>
+
+        <Tab Title="Настройки" Icon="settings_tab.svg">
+            <ShellContent ContentTemplate="{DataTemplate views:SettingsPage}"
+                          Route="settings" />
+        </Tab>
+    </TabBar>
+</Shell>
--- a/BookReader/AppShell.xaml.cs
+++ b/BookReader/AppShell.xaml.cs
@@ -9,7 +9,5 @@ public partial class AppShell : Shell
        InitializeComponent();

        Routing.RegisterRoute("reader", typeof(ReaderPage));
-        Routing.RegisterRoute("settings", typeof(SettingsPage));
-        Routing.RegisterRoute("calibre", typeof(CalibreLibraryPage));
    }
-}
+}
--- a/BookReader/BookReader.csproj
+++ b/BookReader/BookReader.csproj
@@ -36,14 +36,8 @@

 	<ItemGroup>
    <MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
-  </ItemGroup>		
-	
-
-	<ItemGroup>
-	  <AndroidResource Remove="Platforms\Android\Resources\xml\network_security_config.xml" />
-	</ItemGroup>
-
-	<ItemGroup>
+  </ItemGroup>
+<ItemGroup>
 	  <MauiXaml Update="Resources\Styles\AppStyles.xaml">
 	    <Generator>MSBuild:Compile</Generator>
 	  </MauiXaml>
@@ -56,3 +50,4 @@
 		<MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#3E2723" BaseSize="128,128" />
 	</ItemGroup>
 </Project>
+
--- a/BookReader/Constants.cs
+++ b/BookReader/Constants.cs
@@ -1,8 +1,7 @@
-namespace BookReader;
+namespace BookReader;

 public static class Constants
 {
-    // UI Constants
    public static class UI
    {
        public const int ProgressBarMaxWidth = 120;
@@ -12,29 +11,33 @@ public static class Constants
        public const int VerticalItemSpacing = 15;
    }

-    // Reader Constants
    public static class Reader
    {
        public const int DefaultFontSize = 18;
        public const int MinFontSize = 12;
        public const int MaxFontSize = 40;
+        public const string DefaultTheme = "sepia";
+        public const double DefaultBrightness = 100;
+        public const double MinBrightness = 70;
+        public const double MaxBrightness = 120;
        public const int Base64ChunkSize = 400_000;
+        public const int Base64RawChunkSize = 120_000;
        public const int TouchZoneLeftPercent = 30;
        public const int TouchZoneRightPercent = 30;
        public const int TouchZoneCenterPercent = 40;
        public const int SwipeMinDistance = 50;
        public const int SwipeMaxDurationMs = 500;
+        public const int ProgressSaveThrottleSeconds = 2;
    }

-    // Database Constants
    public static class Database
    {
        public const string DatabaseFileName = "bookreader.db3";
        public const int RetryCount = 3;
        public const int RetryBaseDelayMs = 100;
+        public const int MaxReadingHistoryEntriesPerBook = 200;
    }

-    // File Constants
    public static class Files
    {
        public const string BooksFolder = "Books";
@@ -44,7 +47,6 @@ public static class Constants
        public const string Fb2ZipExtension = ".fb2.zip";
    }

-    // Network Constants
    public static class Network
    {
        public const int HttpClientTimeoutSeconds = 30;
@@ -52,7 +54,6 @@ public static class Constants
        public const int CalibrePageSize = 20;
    }

-    // Storage Keys
    public static class StorageKeys
    {
        public const string CalibreUrl = "CalibreUrl";
--- a/BookReader/Platforms/Android/AndroidManifest.xml
+++ b/BookReader/Platforms/Android/AndroidManifest.xml
@@ -4,6 +4,7 @@
        android:allowBackup="true"
        android:supportsRtl="true"
        android:theme="@style/Maui.Main"
+        android:networkSecurityConfig="@xml/network_security_config"
        android:usesCleartextTraffic="true">
 	</application>

@@ -21,4 +22,4 @@
 			<data android:scheme="content" />
 		</intent>
 	</queries>
-</manifest>
+</manifest>
--- a/BookReader/Resources/Images/cloud_tab.svg
+++ b/BookReader/Resources/Images/cloud_tab.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+  <path fill="#A65436" d="M6 17.5A5.5 5.5 0 0 1 6 6.5 6.5 6.5 0 0 1 18.5 8 4.5 4.5 0 1 1 18 17.5z"/>
+  <path fill="#F7E8D9" d="M9 16.5h6.2A3.3 3.3 0 0 0 15 10a4.8 4.8 0 0 0-9.3 1.5A4 4 0 0 0 9 16.5z"/>
+  <path fill="#6F311D" d="M11.25 9.5h1.5v4.2h-1.5z"/>
+  <path fill="#6F311D" d="m9.25 11.7 2.75 2.8 2.75-2.8 1.05 1.05L12 16.55l-3.8-3.8z"/>
+</svg>
--- a/BookReader/Resources/Images/library_tab.svg
+++ b/BookReader/Resources/Images/library_tab.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+  <path fill="#A65436" d="M4 5.5A2.5 2.5 0 0 1 6.5 3H20v15.5A2.5 2.5 0 0 0 17.5 16H6.5A2.5 2.5 0 0 0 4 18.5z"/>
+  <path fill="#F7E8D9" d="M6.5 4.5H18.5V14.5H6.5A4 4 0 0 0 4.75 14.9V5.5A1.75 1.75 0 0 1 6.5 3.75z"/>
+  <path fill="#6F311D" d="M7.5 7h8v1.5h-8zm0 3h6.5v1.5H7.5z"/>
+  <path fill="#27160E" d="M6.5 16.75h11A1.75 1.75 0 0 1 19.25 18.5V20H6.5a1.5 1.5 0 0 1 0-3z"/>
+</svg>
--- a/BookReader/Resources/Images/settings_tab.svg
+++ b/BookReader/Resources/Images/settings_tab.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+  <path fill="#A65436" d="M12 2.5 14 5l3-.2.9 2.8L20.5 9 19 12l1.5 3-2.6 1.4-.9 2.8-3-.2-2 2.5-2-2.5-3 .2L5 16.4 2.5 15 4 12 2.5 9 5 7.6l.9-2.8 3 .2z"/>
+  <circle cx="12" cy="12" r="3.2" fill="#F7E8D9"/>
+  <circle cx="12" cy="12" r="1.5" fill="#27160E"/>
+</svg>
--- a/BookReader/Resources/Raw/wwwroot/index.html
+++ b/BookReader/Resources/Raw/wwwroot/index.html
@@ -1,35 +1,35 @@
-<!DOCTYPE html>
+<!DOCTYPE html>
 <html lang="en">
 <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>Book Reader</title>
    <style>
-        * { /* Сброс отступов и установка box-sizing для всех элементов */
+        * { /* РЎР±СЂРѕСЃ РѕС‚СЃС‚СѓРїРѕРІ Рё СѓСЃС‚Р°РЅРѕРІРєР° box-sizing РґР»СЏ РІСЃРµС… СЌР»РµРјРµРЅС‚РѕРІ */
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

-        html, body { /* Растягиваем страницу на весь экран, отключаем прокрутку и выделение текста */
+        html, body { /* Р Р°СЃС‚СЏРіРёРІР°РµРј СЃС‚СЂР°РЅРёС†Сѓ РЅР° РІРµСЃСЊ СЌРєСЂР°РЅ, РѕС‚РєР»СЋС‡Р°РµРј РїСЂРѕРєСЂСѓС‚РєСѓ Рё РІС‹РґРµР»РµРЅРёРµ С‚РµРєСЃС‚Р° */
            width: 100%;
            height: 100%;
            overflow: hidden;
-            background-color: #faf8ef; /* Цвет "сепия" для комфортного чтения */
+            background-color: #faf8ef; /* Р¦РІРµС‚ "СЃРµРїРёСЏ" РґР»СЏ РєРѕРјС„РѕСЂС‚РЅРѕРіРѕ С‡С‚РµРЅРёСЏ */
            font-family: serif;
-            -webkit-touch-callout: none; /* Запрет контекстного меню при долгом нажатии (iOS) */
-            -webkit-user-select: none; /* Запрет выделения текста */
+            -webkit-touch-callout: none; /* Р—Р°РїСЂРµС‚ РєРѕРЅС‚РµРєСЃС‚РЅРѕРіРѕ РјРµРЅСЋ РїСЂРё РґРѕР»РіРѕРј РЅР°Р¶Р°С‚РёРё (iOS) */
+            -webkit-user-select: none; /* Р—Р°РїСЂРµС‚ РІС‹РґРµР»РµРЅРёСЏ С‚РµРєСЃС‚Р° */
            user-select: none;
        }

-        #reader-container { /* Основной контейнер для книги */
+        #reader-container { /* РћСЃРЅРѕРІРЅРѕР№ РєРѕРЅС‚РµР№РЅРµСЂ РґР»СЏ РєРЅРёРіРё */
            width: 100%;
            height: 100%;
            position: relative;
            overflow: hidden;
        }

-        #book-content, #fb2-content { /* Контейнеры для EPUB и FB2 соответственно */
+        #book-content, #fb2-content { /* РљРѕРЅС‚РµР№РЅРµСЂС‹ РґР»СЏ EPUB Рё FB2 СЃРѕРѕС‚РІРµС‚СЃС‚РІРµРЅРЅРѕ */
            width: 100%;
            height: 100%;
            position: absolute;
@@ -37,7 +37,7 @@
            left: 0;
        }

-        #fb2-content { /* Специфичные настройки для FB2: отступы и скрытие по умолчанию */
+        #fb2-content { /* РЎРїРµС†РёС„РёС‡РЅС‹Рµ РЅР°СЃС‚СЂРѕР№РєРё РґР»СЏ FB2: РѕС‚СЃС‚СѓРїС‹ Рё СЃРєСЂС‹С‚РёРµ РїРѕ СѓРјРѕР»С‡Р°РЅРёСЋ */
            overflow: hidden;
            padding: 20px;
            font-size: 18px;
@@ -45,7 +45,7 @@
            display: none;
        }

-        #loading { /* Центрированный экран загрузки */
+        #loading { /* Р¦РµРЅС‚СЂРёСЂРѕРІР°РЅРЅС‹Р№ СЌРєСЂР°РЅ Р·Р°РіСЂСѓР·РєРё */
            display: flex;
            justify-content: center;
            align-items: center;
@@ -56,7 +56,7 @@
            gap: 15px;
        }

-        .spinner { /* Анимация крутящегося индикатора загрузки */
+        .spinner { /* РђРЅРёРјР°С†РёСЏ РєСЂСѓС‚СЏС‰РµРіРѕСЃСЏ РёРЅРґРёРєР°С‚РѕСЂР° Р·Р°РіСЂСѓР·РєРё */
            width: 40px;
            height: 40px;
            border: 4px solid #ddd;
@@ -65,13 +65,13 @@
            animation: spin 1s linear infinite;
        }

-        @keyframes spin { /* Описание вращения спиннера */
+        @keyframes spin { /* РћРїРёСЃР°РЅРёРµ РІСЂР°С‰РµРЅРёСЏ СЃРїРёРЅРЅРµСЂР° */
            to {
                transform: rotate(360deg);
            }
        }

-        #error-display { /* Контейнер для вывода ошибок */
+        #error-display { /* РљРѕРЅС‚РµР№РЅРµСЂ РґР»СЏ РІС‹РІРѕРґР° РѕС€РёР±РѕРє */
            display: none;
            justify-content: center;
            align-items: center;
@@ -84,7 +84,7 @@
            gap: 10px;
        }

-        /* Прозрачные зоны для управления тапами (назад, меню, вперед) */
+        /* РџСЂРѕР·СЂР°С‡РЅС‹Рµ Р·РѕРЅС‹ РґР»СЏ СѓРїСЂР°РІР»РµРЅРёСЏ С‚Р°РїР°РјРё (РЅР°Р·Р°Рґ, РјРµРЅСЋ, РІРїРµСЂРµРґ) */
        .touch-zone {
            position: fixed;
            top: 0;
@@ -96,17 +96,17 @@
            left: 0;
            width: 30%;
        }
-        /* Левая треть экрана — назад */
+        /* Р›РµРІР°СЏ С‚СЂРµС‚СЊ СЌРєСЂР°РЅР° вЂ” РЅР°Р·Р°Рґ */
        #touch-right {
            right: 0;
            width: 30%;
        }
-        /* Правая треть — вперед */
+        /* РџСЂР°РІР°СЏ С‚СЂРµС‚СЊ вЂ” РІРїРµСЂРµРґ */
        #touch-center {
            left: 30%;
            width: 40%;
        }
-        /* Центр — открыть меню */
+        /* Р¦РµРЅС‚СЂ вЂ” РѕС‚РєСЂС‹С‚СЊ РјРµРЅСЋ */
    </style>
 </head>
 <body>
@@ -116,7 +116,7 @@
            <span id="loading-text">Initializing...</span>
        </div>
        <div id="error-display">
-            <span style="font-size:40px">⚠️</span>
+            <span style="font-size:40px">вљ пёЏ</span>
            <span id="error-text"></span>
        </div>
    </div>
@@ -126,20 +126,14 @@

    <script src="_framework/hybridwebview.js"></script>
    <script src="js/jszip.min.js"></script>
-    <script src="js/epub.min.js"></script> ```
-
-    ---
-
-    ### JavaScript Логика
-
-    ```javascript
+    <script src="js/epub.min.js"></script>
    <script>
-        (function () { // Самовызывающаяся функция для изоляции переменных
+        (function () { // РЎР°РјРѕРІС‹Р·С‹РІР°СЋС‰Р°СЏСЃСЏ С„СѓРЅРєС†РёСЏ РґР»СЏ РёР·РѕР»СЏС†РёРё РїРµСЂРµРјРµРЅРЅС‹С…
            'use strict';

-            // ========== КЭШИРОВАННЫЕ DOM-ЭЛЕМЕНТЫ ==========
-            const $ = id => document.getElementById(id); // Короткий псевдоним для поиска элементов
-            const els = { // Объект со ссылками на элементы для быстрого доступа
+            // ========== РљРРЁРР РћР’РђРќРќР«Р• DOM-РР›Р•РњР•РќРўР« ==========
+            const $ = id => document.getElementById(id); // РљРѕСЂРѕС‚РєРёР№ РїСЃРµРІРґРѕРЅРёРј РґР»СЏ РїРѕРёСЃРєР° СЌР»РµРјРµРЅС‚РѕРІ
+            const els = { // РћР±СЉРµРєС‚ СЃРѕ СЃСЃС‹Р»РєР°РјРё РЅР° СЌР»РµРјРµРЅС‚С‹ РґР»СЏ Р±С‹СЃС‚СЂРѕРіРѕ РґРѕСЃС‚СѓРїР°
                loading: $('loading'),
                loadingText: $('loading-text'),
                errorDisplay: $('error-display'),
@@ -148,83 +142,88 @@
                fb2Content: $('fb2-content'),
            };

-            // ========== СОСТОЯНИЕ (STATE) ==========
-            const state = { // Глобальный объект состояния текущей книги
-                book: null,        // Объект книги epub.js
-                rendition: null,   // Объект отображения epub.js
-                currentCfi: null,  // Текущая позиция (идентификатор) в EPUB
-                totalPages: 0,     // Всего страниц
-                bookFormat: '',    // epub или fb2
+            // ========== РЎРћРЎРўРћРЇРќРР• (STATE) ==========
+            const state = { // Р“Р»РѕР±Р°Р»СЊРЅС‹Р№ РѕР±СЉРµРєС‚ СЃРѕСЃС‚РѕСЏРЅРёСЏ С‚РµРєСѓС‰РµР№ РєРЅРёРіРё
+                book: null,        // РћР±СЉРµРєС‚ РєРЅРёРіРё epub.js
+                rendition: null,   // РћР±СЉРµРєС‚ РѕС‚РѕР±СЂР°Р¶РµРЅРёСЏ epub.js
+                currentCfi: null,  // РўРµРєСѓС‰Р°СЏ РїРѕР·РёС†РёСЏ (РёРґРµРЅС‚РёС„РёРєР°С‚РѕСЂ) РІ EPUB
+                totalPages: 0,     // Р’СЃРµРіРѕ СЃС‚СЂР°РЅРёС†
+                bookFormat: '',    // epub РёР»Рё fb2
                isBookLoaded: false,
                fb2CurrentPage: 0,
                fb2TotalPages: 1,
-                toc: [],           // Оглавление
-                lastCfi: null      // Последний CFI
+                toc: [],           // РћРіР»Р°РІР»РµРЅРёРµ
+                lastCfi: null,
+                currentPage: 0,
+                currentFontSize: 18,
+                currentFontFamily: 'serif',
+                currentTheme: 'sepia',
+                brightness: 100
            };

-            // ========== УТИЛИТЫ ==========
-            function debugLog(msg) { // Логирование в консоль с префиксом
+            // ========== РЈРўРР›РРўР« ==========
+            function debugLog(msg) { // Р›РѕРіРёСЂРѕРІР°РЅРёРµ РІ РєРѕРЅСЃРѕР»СЊ СЃ РїСЂРµС„РёРєСЃРѕРј
                console.log('[Reader] ' + msg);
            }

-            function showError(msg) { // Показ экрана ошибки пользователю
+            function showError(msg) { // РџРѕРєР°Р· СЌРєСЂР°РЅР° РѕС€РёР±РєРё РїРѕР»СЊР·РѕРІР°С‚РµР»СЋ
                els.loading.style.display = 'none';
                els.errorDisplay.style.display = 'flex';
                els.errorText.textContent = msg;
                debugLog('ERROR: ' + msg);
            }

-            function setLoadingText(msg) { // Обновление текста на экране загрузки
+            function setLoadingText(msg) { // РћР±РЅРѕРІР»РµРЅРёРµ С‚РµРєСЃС‚Р° РЅР° СЌРєСЂР°РЅРµ Р·Р°РіСЂСѓР·РєРё
                if (els.loadingText) els.loadingText.textContent = msg;
                debugLog(msg);
            }

-            const _escDiv = document.createElement('div'); // Буфер для очистки HTML
-            function escapeHtml(text) { // Защита от XSS: превращает < в &lt; и т.д.
+            const _escDiv = document.createElement('div'); // Р‘СѓС„РµСЂ РґР»СЏ РѕС‡РёСЃС‚РєРё HTML
+            function escapeHtml(text) { // Р—Р°С‰РёС‚Р° РѕС‚ XSS: РїСЂРµРІСЂР°С‰Р°РµС‚ < РІ &lt; Рё С‚.Рґ.
                _escDiv.textContent = text;
                return _escDiv.innerHTML;
            }

-            function base64ToArrayBuffer(base64) { // Конвертация данных из строки (Base64) в бинарный массив
-                const bin = atob(base64); // Декодирование base64
+            function base64ToArrayBuffer(base64) { // РљРѕРЅРІРµСЂС‚Р°С†РёСЏ РґР°РЅРЅС‹С… РёР· СЃС‚СЂРѕРєРё (Base64) РІ Р±РёРЅР°СЂРЅС‹Р№ РјР°СЃСЃРёРІ
+                const bin = atob(base64); // Р”РµРєРѕРґРёСЂРѕРІР°РЅРёРµ base64
                const len = bin.length;
                const buf = new ArrayBuffer(len);
                const view = new Uint8Array(buf);
                for (let i = 0; i < len; i++) {
-                    view[i] = bin.charCodeAt(i); // Заполнение массива байтами
+                    view[i] = bin.charCodeAt(i); // Р—Р°РїРѕР»РЅРµРЅРёРµ РјР°СЃСЃРёРІР° Р±Р°Р№С‚Р°РјРё
                }
                return buf;
            }
            function calculateOptimalLocationSize() {
-                // 1. Получаем размеры видимой области
+                // 1. РџРѕР»СѓС‡Р°РµРј СЂР°Р·РјРµСЂС‹ РІРёРґРёРјРѕР№ РѕР±Р»Р°СЃС‚Рё
                const width = window.innerWidth;
                const height = window.innerHeight;

-                // 2. Получаем текущий размер шрифта (из состояния или напрямую из настроек)
-                // Если размер шрифта еще не задан, используем 18px по умолчанию
+                // 2. РџРѕР»СѓС‡Р°РµРј С‚РµРєСѓС‰РёР№ СЂР°Р·РјРµСЂ С€СЂРёС„С‚Р° (РёР· СЃРѕСЃС‚РѕСЏРЅРёСЏ РёР»Рё РЅР°РїСЂСЏРјСѓСЋ РёР· РЅР°СЃС‚СЂРѕРµРє)
+                // Р•СЃР»Рё СЂР°Р·РјРµСЂ С€СЂРёС„С‚Р° РµС‰Рµ РЅРµ Р·Р°РґР°РЅ, РёСЃРїРѕР»СЊР·СѓРµРј 18px РїРѕ СѓРјРѕР»С‡Р°РЅРёСЋ
                const fontSize = state.currentFontSize || 18;

-                // 3. Эмпирический коэффициент: 
-                // На 1 квадратный пиксель при 18-м шрифте приходится примерно 0.005 - 0.007 символа.
-                // Мы рассчитываем "площадь" одного символа.
-                // Чем больше шрифт, тем больше места занимает символ (квадратичная зависимость).
+                // 3. РРјРїРёСЂРёС‡РµСЃРєРёР№ РєРѕСЌС„С„РёС†РёРµРЅС‚: 
+                // РќР° 1 РєРІР°РґСЂР°С‚РЅС‹Р№ РїРёРєСЃРµР»СЊ РїСЂРё 18-Рј С€СЂРёС„С‚Рµ РїСЂРёС…РѕРґРёС‚СЃСЏ РїСЂРёРјРµСЂРЅРѕ 0.005 - 0.007 СЃРёРјРІРѕР»Р°.
+                // РњС‹ СЂР°СЃСЃС‡РёС‚С‹РІР°РµРј "РїР»РѕС‰Р°РґСЊ" РѕРґРЅРѕРіРѕ СЃРёРјРІРѕР»Р°.
+                // Р§РµРј Р±РѕР»СЊС€Рµ С€СЂРёС„С‚, С‚РµРј Р±РѕР»СЊС€Рµ РјРµСЃС‚Р° Р·Р°РЅРёРјР°РµС‚ СЃРёРјРІРѕР» (РєРІР°РґСЂР°С‚РёС‡РЅР°СЏ Р·Р°РІРёСЃРёРјРѕСЃС‚СЊ).
                const charArea = (fontSize * fontSize) * 0.55;

-                // 4. Рассчитываем общую вместимость экрана в символах
+                // 4. Р Р°СЃСЃС‡РёС‚С‹РІР°РµРј РѕР±С‰СѓСЋ РІРјРµСЃС‚РёРјРѕСЃС‚СЊ СЌРєСЂР°РЅР° РІ СЃРёРјРІРѕР»Р°С…
                const screenArea = width * height;
                let charactersPerScreen = Math.floor(screenArea / charArea);

-                // 5. Ограничиваем значения для стабильности epub.js
-                // Минимум 400 (чтобы не плодить тысячи локаций на маленьких текстах)
-                // Максимум 1500 (чтобы избежать "залипания" на больших экранах)
+                // 5. РћРіСЂР°РЅРёС‡РёРІР°РµРј Р·РЅР°С‡РµРЅРёСЏ РґР»СЏ СЃС‚Р°Р±РёР»СЊРЅРѕСЃС‚Рё epub.js
+                // РњРёРЅРёРјСѓРј 400 (С‡С‚РѕР±С‹ РЅРµ РїР»РѕРґРёС‚СЊ С‚С‹СЃСЏС‡Рё Р»РѕРєР°С†РёР№ РЅР° РјР°Р»РµРЅСЊРєРёС… С‚РµРєСЃС‚Р°С…)
+                // РњР°РєСЃРёРјСѓРј 1500 (С‡С‚РѕР±С‹ РёР·Р±РµР¶Р°С‚СЊ "Р·Р°Р»РёРїР°РЅРёСЏ" РЅР° Р±РѕР»СЊС€РёС… СЌРєСЂР°РЅР°С…)
                const finalSize = Math.max(400, Math.min(1000, charactersPerScreen));

-                debugLog(`Расчет локации: Экран ${width}x${height}, Шрифт ${fontSize}px => Размер локации: ${finalSize}`);
+                debugLog(`Р Р°СЃС‡РµС‚ Р»РѕРєР°С†РёРё: РРєСЂР°РЅ ${width}x${height}, РЁСЂРёС„С‚ ${fontSize}px => Р Р°Р·РјРµСЂ Р»РѕРєР°С†РёРё: ${finalSize}`);

                return finalSize;
            }
-            // ========== MESSAGE BRIDGE (Связь с приложением) ==========
-            function sendMessage(action, data) { // Отправка данных в нативный код (C# / Swift / Kotlin)
+            // ========== MESSAGE BRIDGE (РЎРІСЏР·СЊ СЃ РїСЂРёР»РѕР¶РµРЅРёРµРј) ==========
+            function sendMessage(action, data) { // РћС‚РїСЂР°РІРєР° РґР°РЅРЅС‹С… РІ РЅР°С‚РёРІРЅС‹Р№ РєРѕРґ (C# / Swift / Kotlin)
                const message = JSON.stringify({ action, data: data || {} });
                try {
                    if (window.HybridWebView && typeof window.HybridWebView.SendRawMessage === 'function') {
@@ -235,39 +234,39 @@
                }
            }

-            // ========== TOUCH / SWIPE (Жесты) ==========
+            // ========== TOUCH / SWIPE (Р–РµСЃС‚С‹) ==========
            let swipeStartX = 0, swipeStartY = 0, swipeStartTime = 0;

-            const touchActions = { // Действия при клике на зоны
+            const touchActions = { // Р”РµР№СЃС‚РІРёСЏ РїСЂРё РєР»РёРєРµ РЅР° Р·РѕРЅС‹
                'touch-left': () => window.prevPage(),
                'touch-right': () => window.nextPage(),
-                'touch-center': () => sendMessage('toggleMenu', {}), // Показать меню приложения
+                'touch-center': () => sendMessage('toggleMenu', {}), // РџРѕРєР°Р·Р°С‚СЊ РјРµРЅСЋ РїСЂРёР»РѕР¶РµРЅРёСЏ
            };

-            function initTouchZones() { // Настройка слушателей событий на зоны тача
+            function initTouchZones() { // РќР°СЃС‚СЂРѕР№РєР° СЃР»СѓС€Р°С‚РµР»РµР№ СЃРѕР±С‹С‚РёР№ РЅР° Р·РѕРЅС‹ С‚Р°С‡Р°
                Object.keys(touchActions).forEach(id => {
                    const el = $(id);
                    if (!el) return;

-                    el.addEventListener('click', e => { // Обработка обычного клика
+                    el.addEventListener('click', e => { // РћР±СЂР°Р±РѕС‚РєР° РѕР±С‹С‡РЅРѕРіРѕ РєР»РёРєР°
                        e.preventDefault();
                        e.stopPropagation();
                        touchActions[id]();
                    });

-                    el.addEventListener('touchstart', e => { // Начало касания для свайпа
+                    el.addEventListener('touchstart', e => { // РќР°С‡Р°Р»Рѕ РєР°СЃР°РЅРёСЏ РґР»СЏ СЃРІР°Р№РїР°
                        const t = e.touches[0];
                        swipeStartX = t.clientX;
                        swipeStartY = t.clientY;
                        swipeStartTime = Date.now();
                    }, { passive: true });

-                    el.addEventListener('touchend', e => { // Конец касания: расчет свайпа
+                    el.addEventListener('touchend', e => { // РљРѕРЅРµС† РєР°СЃР°РЅРёСЏ: СЂР°СЃС‡РµС‚ СЃРІР°Р№РїР°
                        const t = e.changedTouches[0];
-                        const dx = t.clientX - swipeStartX; // Смещение по горизонтали
-                        const dy = t.clientY - swipeStartY; // Смещение по вертикали
-                        const dt = Date.now() - swipeStartTime; // Время касания
-                        // Если быстро (меньше 0.5с), горизонтально и длиннее 50px
+                        const dx = t.clientX - swipeStartX; // РЎРјРµС‰РµРЅРёРµ РїРѕ РіРѕСЂРёР·РѕРЅС‚Р°Р»Рё
+                        const dy = t.clientY - swipeStartY; // РЎРјРµС‰РµРЅРёРµ РїРѕ РІРµСЂС‚РёРєР°Р»Рё
+                        const dt = Date.now() - swipeStartTime; // Р’СЂРµРјСЏ РєР°СЃР°РЅРёСЏ
+                        // Р•СЃР»Рё Р±С‹СЃС‚СЂРѕ (РјРµРЅСЊС€Рµ 0.5СЃ), РіРѕСЂРёР·РѕРЅС‚Р°Р»СЊРЅРѕ Рё РґР»РёРЅРЅРµРµ 50px
                        if (dt < 500 && Math.abs(dx) > Math.abs(dy) && Math.abs(dx) > 50) {
                            dx < 0 ? window.nextPage() : window.prevPage();
                        }
@@ -283,20 +282,20 @@
                    if (typeof JSZip === 'undefined') { showError('JSZip not loaded!'); return; }
                    if (typeof ePub === 'undefined') { showError('epub.js not loaded!'); return; }

-                    state.book = ePub(arrayBuffer); // Создание объекта книги из данных
+                    state.book = ePub(arrayBuffer); // РЎРѕР·РґР°РЅРёРµ РѕР±СЉРµРєС‚Р° РєРЅРёРіРё РёР· РґР°РЅРЅС‹С…
                    state.lastCfi = null;
                    els.fb2Content.style.display = 'none';
                    els.bookContent.style.display = 'block';

-                    // Рендеринг (отрисовка) книги в контейнер
+                    // Р РµРЅРґРµСЂРёРЅРі (РѕС‚СЂРёСЃРѕРІРєР°) РєРЅРёРіРё РІ РєРѕРЅС‚РµР№РЅРµСЂ
                    state.rendition = state.book.renderTo('book-content', {
                        width: '100%',
                        height: '100%',
-                        spread: 'none', // Без двухстраничного режима
-                        flow: 'paginated' // Режим постраничного отображения
+                        spread: 'none', // Р‘РµР· РґРІСѓС…СЃС‚СЂР°РЅРёС‡РЅРѕРіРѕ СЂРµР¶РёРјР°
+                        flow: 'paginated' // Р РµР¶РёРј РїРѕСЃС‚СЂР°РЅРёС‡РЅРѕРіРѕ РѕС‚РѕР±СЂР°Р¶РµРЅРёСЏ
                    });

-                    // Настройка стилей внутри фрейма книги
+                    // РќР°СЃС‚СЂРѕР№РєР° СЃС‚РёР»РµР№ РІРЅСѓС‚СЂРё С„СЂРµР№РјР° РєРЅРёРіРё
                    state.rendition.themes.default({
                        'body': {
                            'font-family': 'serif !important',
@@ -310,32 +309,32 @@
                    });

                    state.book.ready.then(() => {
-                        // Убираем экран загрузки СРАЗУ, как только книга готова к отрисовке первой страницы
+                        // РЈР±РёСЂР°РµРј СЌРєСЂР°РЅ Р·Р°РіСЂСѓР·РєРё РЎР РђР—РЈ, РєР°Рє С‚РѕР»СЊРєРѕ РєРЅРёРіР° РіРѕС‚РѕРІР° Рє РѕС‚СЂРёСЃРѕРІРєРµ РїРµСЂРІРѕР№ СЃС‚СЂР°РЅРёС†С‹
                        els.loading.style.display = 'none';

-                        // Обработка оглавления
+                        // РћР±СЂР°Р±РѕС‚РєР° РѕРіР»Р°РІР»РµРЅРёСЏ
                        const toc = state.book.navigation.toc || [];
                        state.toc = toc.map(ch => ({ label: ch.label.trim(), href: ch.href }));
                        sendMessage('chaptersLoaded', { chapters: state.toc });

-                        // ПРОВЕРКА КЭША: Если мы уже передали сохраненные локации
+                        // РџР РћР’Р•Р РљРђ РљРРЁРђ: Р•СЃР»Рё РјС‹ СѓР¶Рµ РїРµСЂРµРґР°Р»Рё СЃРѕС…СЂР°РЅРµРЅРЅС‹Рµ Р»РѕРєР°С†РёРё
                        if (cachedLocations) {
-                            debugLog("Загрузка из кэша...");
+                            debugLog("Р—Р°РіСЂСѓР·РєР° РёР· РєСЌС€Р°...");
                            state.book.locations.load(cachedLocations);
                            state.totalPages = state.book.locations.length();
                            state.lastCfi = null;
                            sendMessage('bookReady', { totalPages: state.totalPages });
                        } else {
-                            // Используем setTimeout, чтобы не блокировать поток отрисовки
+                            // РСЃРїРѕР»СЊР·СѓРµРј setTimeout, С‡С‚РѕР±С‹ РЅРµ Р±Р»РѕРєРёСЂРѕРІР°С‚СЊ РїРѕС‚РѕРє РѕС‚СЂРёСЃРѕРІРєРё
                            const dynamicSize = calculateOptimalLocationSize();
-                            // Запускаем генерацию с динамическим размером
+                            // Р—Р°РїСѓСЃРєР°РµРј РіРµРЅРµСЂР°С†РёСЋ СЃ РґРёРЅР°РјРёС‡РµСЃРєРёРј СЂР°Р·РјРµСЂРѕРј
                            setTimeout(() => {
                                state.book.locations.generate(1000).then(() => {
                                    state.totalPages = state.book.locations.length();
                                    const locationsToSave = state.book.locations.save();
                                    state.lastCfi = null;

-                                    // Отправляем в C#, чтобы сохранить на будущее
+                                    // РћС‚РїСЂР°РІР»СЏРµРј РІ C#, С‡С‚РѕР±С‹ СЃРѕС…СЂР°РЅРёС‚СЊ РЅР° Р±СѓРґСѓС‰РµРµ
                                    sendMessage('saveLocations', { locations: locationsToSave });
                                    sendMessage('bookReady', { totalPages: state.totalPages });
                                });
@@ -343,32 +342,32 @@
                        }
                    });

-                    // Событие при смене страницы
+                    // РЎРѕР±С‹С‚РёРµ РїСЂРё СЃРјРµРЅРµ СЃС‚СЂР°РЅРёС†С‹
                    state.rendition.on('relocated', location => {
                        if (!location || !location.start) return;
                        const newCfi = location.start.cfi;
                        
-                        // Получаем процент прогресса
+                        // РџРѕР»СѓС‡Р°РµРј РїСЂРѕС†РµРЅС‚ РїСЂРѕРіСЂРµСЃСЃР°
                        const progress = state.book.locations.percentageFromCfi(newCfi) || 0;
                        
-                        // Обновляем lastCfi
+                        // РћР±РЅРѕРІР»СЏРµРј lastCfi
                        state.lastCfi = newCfi;

                        const chapterPage = location.start.displayed ? location.start.displayed.page : 1;
                        const chapterTotal = location.start.displayed ? location.start.displayed.total : 1;
                        const currentHref = location.start.href || '';

-                        // Поиск человеческого названия текущей главы
+                        // РџРѕРёСЃРє С‡РµР»РѕРІРµС‡РµСЃРєРѕРіРѕ РЅР°Р·РІР°РЅРёСЏ С‚РµРєСѓС‰РµР№ РіР»Р°РІС‹
                        let chapterName = currentHref;
                        const foundChapter = state.toc.find(ch => currentHref.includes(ch.href));
                        if (foundChapter) chapterName = foundChapter.label;

-                        // Отправка прогресса в приложение
-                        // currentPage теперь показывает процент (округлённый до целого)
+                        // РћС‚РїСЂР°РІРєР° РїСЂРѕРіСЂРµСЃСЃР° РІ РїСЂРёР»РѕР¶РµРЅРёРµ
+                        // currentPage С‚РµРїРµСЂСЊ РїРѕРєР°Р·С‹РІР°РµС‚ РїСЂРѕС†РµРЅС‚ (РѕРєСЂСѓРіР»С‘РЅРЅС‹Р№ РґРѕ С†РµР»РѕРіРѕ)
                        sendMessage('progressUpdate', {
                            progress: progress,
                            cfi: newCfi,
-                            currentPage: Math.round(progress * 100), // Процент вместо номера страницы
+                            currentPage: Math.round(progress * 100), // РџСЂРѕС†РµРЅС‚ РІРјРµСЃС‚Рѕ РЅРѕРјРµСЂР° СЃС‚СЂР°РЅРёС†С‹
                            totalPages: 100, // 100%
                            chapterCurrentPage: chapterPage,
                            chapterTotalPages: chapterTotal,
@@ -376,7 +375,7 @@
                        });
                    });

-                    // Отображение книги на сохраненной позиции или в начале
+                    // РћС‚РѕР±СЂР°Р¶РµРЅРёРµ РєРЅРёРіРё РЅР° СЃРѕС…СЂР°РЅРµРЅРЅРѕР№ РїРѕР·РёС†РёРё РёР»Рё РІ РЅР°С‡Р°Р»Рµ
                    const displayTarget = (lastCfi && lastCfi !== 'null' && lastCfi !== 'undefined') ? lastCfi : undefined;
                    state.rendition.display(displayTarget);

@@ -391,7 +390,7 @@
                    const bytes = new Uint8Array(arrayBuffer);
                    let xmlText = new TextDecoder('utf-8').decode(bytes);

-                    // Проверка кодировки в заголовке XML (если не UTF-8, перекодируем)
+                    // РџСЂРѕРІРµСЂРєР° РєРѕРґРёСЂРѕРІРєРё РІ Р·Р°РіРѕР»РѕРІРєРµ XML (РµСЃР»Рё РЅРµ UTF-8, РїРµСЂРµРєРѕРґРёСЂСѓРµРј)
                    const encMatch = xmlText.match(/encoding=["\']([^"\']+)["\']/i);
                    if (encMatch && encMatch[1].toLowerCase() !== 'utf-8') {
                        xmlText = new TextDecoder(encMatch[1]).decode(bytes);
@@ -401,18 +400,18 @@
                    els.bookContent.style.display = 'none';
                    els.fb2Content.style.display = 'block';

-                    // Парсинг строки в XML-документ
+                    // РџР°СЂСЃРёРЅРі СЃС‚СЂРѕРєРё РІ XML-РґРѕРєСѓРјРµРЅС‚
                    const doc = new DOMParser().parseFromString(xmlText, 'text/xml');
                    if (doc.querySelector('parsererror')) { showError('FB2 XML parse error'); return; }

-                    const fb2Html = parseFb2Document(doc); // Преобразование FB2 XML в HTML
+                    const fb2Html = parseFb2Document(doc); // РџСЂРµРѕР±СЂР°Р·РѕРІР°РЅРёРµ FB2 XML РІ HTML
                    els.fb2Content.innerHTML = fb2Html.html;
                    els.loading.style.display = 'none';

-                    // Использование анимационных кадров для замера размеров после вставки в DOM
+                    // РСЃРїРѕР»СЊР·РѕРІР°РЅРёРµ Р°РЅРёРјР°С†РёРѕРЅРЅС‹С… РєР°РґСЂРѕРІ РґР»СЏ Р·Р°РјРµСЂР° СЂР°Р·РјРµСЂРѕРІ РїРѕСЃР»Рµ РІСЃС‚Р°РІРєРё РІ DOM
                    requestAnimationFrame(() => {
                        requestAnimationFrame(() => {
-                            setupFb2Pagination(); // Нарезка на колонки
+                            setupFb2Pagination(); // РќР°СЂРµР·РєР° РЅР° РєРѕР»РѕРЅРєРё
                            sendMessage('chaptersLoaded', { chapters: fb2Html.chapters });
                            sendMessage('bookReady', { totalPages: state.totalPages });
                            state.isBookLoaded = true;
@@ -424,20 +423,20 @@
                } catch (e) { showError('FB2 error: ' + e.message); }
            }

-            // ========== FB2 PARSER (Преобразование тегов) ==========
-            function localTag(el) { // Утилита для получения имени тега без пространств имен (типа fb2:)
+            // ========== FB2 PARSER (РџСЂРµРѕР±СЂР°Р·РѕРІР°РЅРёРµ С‚РµРіРѕРІ) ==========
+            function localTag(el) { // РЈС‚РёР»РёС‚Р° РґР»СЏ РїРѕР»СѓС‡РµРЅРёСЏ РёРјРµРЅРё С‚РµРіР° Р±РµР· РїСЂРѕСЃС‚СЂР°РЅСЃС‚РІ РёРјРµРЅ (С‚РёРїР° fb2:)
                return el.tagName ? el.tagName.toLowerCase().replace(/.*:/, '') : '';
            }

            function parseFb2Document(doc) {
                const chapters = [];
                const parts = ['<div id="fb2-inner" style="font-size:18px;font-family:serif;line-height:1.6;">'];
-                let bodies = doc.querySelectorAll('body'); // FB2 может иметь несколько body (основной текст, сноски)
+                let bodies = doc.querySelectorAll('body'); // FB2 РјРѕР¶РµС‚ РёРјРµС‚СЊ РЅРµСЃРєРѕР»СЊРєРѕ body (РѕСЃРЅРѕРІРЅРѕР№ С‚РµРєСЃС‚, СЃРЅРѕСЃРєРё)

                let chapterIndex = 0;
                for (const body of bodies) {
                    for (const child of body.children) {
-                        if (localTag(child) === 'section') { // Секции — это главы
+                        if (localTag(child) === 'section') { // РЎРµРєС†РёРё вЂ” СЌС‚Рѕ РіР»Р°РІС‹
                            const result = parseFb2Section(child, chapterIndex);
                            parts.push(result.html);
                            chapters.push(...result.chapters);
@@ -449,14 +448,14 @@
                return { html: parts.join(''), chapters };
            }

-            // Обработчики конкретных тегов FB2
+            // РћР±СЂР°Р±РѕС‚С‡РёРєРё РєРѕРЅРєСЂРµС‚РЅС‹С… С‚РµРіРѕРІ FB2
            const sectionTagHandlers = {
-                title(child, idx, chapters) { // Заголовки глав
+                title(child, idx, chapters) { // Р—Р°РіРѕР»РѕРІРєРё РіР»Р°РІ
                    const text = (child.textContent || '').trim();
                    chapters.push({ label: text, href: idx.toString() });
                    return `<h2 class="fb2-title" data-chapter="${idx}" style="text-align:center;margin:1em 0 .5em">${escapeHtml(text)}</h2>`;
                },
-                p(child) { // Абзацы
+                p(child) { // РђР±Р·Р°С†С‹
                    return `<p style="text-indent:1.5em;margin-bottom:.3em">${getInlineHtml(child)}</p>`;
                },
                'empty-line'() { return '<br/>'; },
@@ -471,7 +470,7 @@
                const parts = [`<div class="fb2-section" data-section="${startIndex}">`];
                for (const child of section.children) {
                    const tag = localTag(child);
-                    if (tag === 'section') { // Рекурсия для вложенных секций
+                    if (tag === 'section') { // Р РµРєСѓСЂСЃРёСЏ РґР»СЏ РІР»РѕР¶РµРЅРЅС‹С… СЃРµРєС†РёР№
                        const sub = parseFb2Section(child, startIndex + chapters.length);
                        parts.push(sub.html);
                        chapters.push(...sub.chapters);
@@ -483,11 +482,11 @@
                return { html: parts.join(''), chapters };
            }

-            function getInlineHtml(el) { // Обработка форматирования внутри строки (жирный, курсив)
+            function getInlineHtml(el) { // РћР±СЂР°Р±РѕС‚РєР° С„РѕСЂРјР°С‚РёСЂРѕРІР°РЅРёСЏ РІРЅСѓС‚СЂРё СЃС‚СЂРѕРєРё (Р¶РёСЂРЅС‹Р№, РєСѓСЂСЃРёРІ)
                const parts = [];
                for (const node of el.childNodes) {
-                    if (node.nodeType === 3) parts.push(escapeHtml(node.textContent)); // Текст
-                    else if (node.nodeType === 1) { // Тег
+                    if (node.nodeType === 3) parts.push(escapeHtml(node.textContent)); // РўРµРєСЃС‚
+                    else if (node.nodeType === 1) { // РўРµРі
                        const tag = localTag(node);
                        const inner = getInlineHtml(node);
                        if (tag === 'strong' || tag === 'bold') parts.push(`<strong>${inner}</strong>`);
@@ -499,17 +498,17 @@
                return parts.join('');
            }

-            function parseInnerParagraphs(el) { // Парсинг группы абзацев (для цитат/эпиграфов)
+            function parseInnerParagraphs(el) { // РџР°СЂСЃРёРЅРі РіСЂСѓРїРїС‹ Р°Р±Р·Р°С†РµРІ (РґР»СЏ С†РёС‚Р°С‚/СЌРїРёРіСЂР°С„РѕРІ)
                const parts = [];
                for (const child of el.children) {
                    const tag = localTag(child);
                    if (tag === 'p') parts.push(`<p>${getInlineHtml(child)}</p>`);
-                    else if (tag === 'text-author') parts.push(`<p style="text-align:right;font-style:italic">— ${escapeHtml(child.textContent || '')}</p>`);
+                    else if (tag === 'text-author') parts.push(`<p style="text-align:right;font-style:italic">вЂ” ${escapeHtml(child.textContent || '')}</p>`);
                }
                return parts.join('');
            }

-            function parsePoem(el) { // Парсинг стихов (строфы и строки)
+            function parsePoem(el) { // РџР°СЂСЃРёРЅРі СЃС‚РёС…РѕРІ (СЃС‚СЂРѕС„С‹ Рё СЃС‚СЂРѕРєРё)
                const parts = [];
                for (const child of el.children) {
                    const tag = localTag(child);
@@ -526,7 +525,7 @@
                return parts.join('');
            }

-            // ========== FB2 PAGINATION (Имитация страниц через CSS Columns) ==========
+            // ========== FB2 PAGINATION (РРјРёС‚Р°С†РёСЏ СЃС‚СЂР°РЅРёС† С‡РµСЂРµР· CSS Columns) ==========
            function setupFb2Pagination() {
                const container = els.fb2Content;
                const inner = $('fb2-inner');
@@ -535,17 +534,17 @@
                const w = container.clientWidth;
                const h = container.clientHeight;

-                // Основная магия: CSS превращает длинный текст в ряд колонок шириной с экран
+                // РћСЃРЅРѕРІРЅР°СЏ РјР°РіРёСЏ: CSS РїСЂРµРІСЂР°С‰Р°РµС‚ РґР»РёРЅРЅС‹Р№ С‚РµРєСЃС‚ РІ СЂСЏРґ РєРѕР»РѕРЅРѕРє С€РёСЂРёРЅРѕР№ СЃ СЌРєСЂР°РЅ
                Object.assign(inner.style, {
                    columnWidth: w + 'px',
-                    columnGap: '40px', // Зазор между колонками
+                    columnGap: '40px', // Р—Р°Р·РѕСЂ РјРµР¶РґСѓ РєРѕР»РѕРЅРєР°РјРё
                    columnFill: 'auto',
                    height: h + 'px',
                    overflow: 'hidden',
                });

                requestAnimationFrame(() => {
-                    // Общая ширина контента делить на ширину экрана = количество страниц
+                    // РћР±С‰Р°СЏ С€РёСЂРёРЅР° РєРѕРЅС‚РµРЅС‚Р° РґРµР»РёС‚СЊ РЅР° С€РёСЂРёРЅСѓ СЌРєСЂР°РЅР° = РєРѕР»РёС‡РµСЃС‚РІРѕ СЃС‚СЂР°РЅРёС†
                    state.fb2TotalPages = Math.max(1, Math.ceil(inner.scrollWidth / w));
                    state.totalPages = state.fb2TotalPages;
                    state.fb2CurrentPage = 0;
@@ -554,17 +553,17 @@
                });
            }

-            function showFb2Page(idx) { // Переход на конкретную страницу FB2
+            function showFb2Page(idx) { // РџРµСЂРµС…РѕРґ РЅР° РєРѕРЅРєСЂРµС‚РЅСѓСЋ СЃС‚СЂР°РЅРёС†Сѓ FB2
                idx = Math.max(0, Math.min(idx, state.fb2TotalPages - 1));
                state.fb2CurrentPage = idx;
                const inner = $('fb2-inner');
                if (inner) {
-                    // Сдвигаем контент влево, чтобы показать нужную "колонку"
+                    // РЎРґРІРёРіР°РµРј РєРѕРЅС‚РµРЅС‚ РІР»РµРІРѕ, С‡С‚РѕР±С‹ РїРѕРєР°Р·Р°С‚СЊ РЅСѓР¶РЅСѓСЋ "РєРѕР»РѕРЅРєСѓ"
                    inner.style.transform = `translateX(-${idx * els.fb2Content.clientWidth}px)`;
                }
            }

-            function updateFb2Progress() { // Оповещение приложения о прогрессе в FB2
+            function updateFb2Progress() { // РћРїРѕРІРµС‰РµРЅРёРµ РїСЂРёР»РѕР¶РµРЅРёСЏ Рѕ РїСЂРѕРіСЂРµСЃСЃРµ РІ FB2
                const total = state.fb2TotalPages;
                const progress = total > 1 ? state.fb2CurrentPage / (total - 1) : 0;
                sendMessage('progressUpdate', {
@@ -576,7 +575,7 @@
                });
            }

-            function getCurrentFb2Chapter() { // Поиск заголовка, который сейчас виден на экране
+            function getCurrentFb2Chapter() { // РџРѕРёСЃРє Р·Р°РіРѕР»РѕРІРєР°, РєРѕС‚РѕСЂС‹Р№ СЃРµР№С‡Р°СЃ РІРёРґРµРЅ РЅР° СЌРєСЂР°РЅРµ
                const inner = $('fb2-inner');
                const container = els.fb2Content;
                if (!inner || !container) return '';
@@ -590,15 +589,15 @@
                return chapter;
            }

-            function goToFb2Position(progress) { // Переход по проценту (0.0 - 1.0)
+            function goToFb2Position(progress) { // РџРµСЂРµС…РѕРґ РїРѕ РїСЂРѕС†РµРЅС‚Сѓ (0.0 - 1.0)
                showFb2Page(Math.round(progress * (state.fb2TotalPages - 1)));
            }

-            // ========== PUBLIC API (Методы, доступные извне, например из C#) ==========
+            // ========== PUBLIC API (РњРµС‚РѕРґС‹, РґРѕСЃС‚СѓРїРЅС‹Рµ РёР·РІРЅРµ, РЅР°РїСЂРёРјРµСЂ РёР· C#) ==========
            window.loadBookFromBase64 = function (base64Data, format, lastPosition, cachedLocations) {
                state.bookFormat = format;
                if (format === 'epub') {
-                    // Передаем кэш в основную функцию загрузки
+                    // РџРµСЂРµРґР°РµРј РєСЌС€ РІ РѕСЃРЅРѕРІРЅСѓСЋ С„СѓРЅРєС†РёСЋ Р·Р°РіСЂСѓР·РєРё
                    loadEpubFromBase64(base64Data, lastPosition, cachedLocations);
                }
                else if (format === 'fb2') {
@@ -607,7 +606,7 @@
                else showError('Unsupported format: ' + format);
            };

-            window.nextPage = function () { // Листать вперед
+            window.nextPage = function () { // Р›РёСЃС‚Р°С‚СЊ РІРїРµСЂРµРґ
                if (state.bookFormat === 'epub' && state.rendition) {
                    state.rendition.next();
                }
@@ -617,7 +616,7 @@
                }
            };

-            window.prevPage = function () { // Листать назад
+            window.prevPage = function () { // Р›РёСЃС‚Р°С‚СЊ РЅР°Р·Р°Рґ
                if (state.bookFormat === 'epub' && state.rendition) {
                    state.rendition.prev();
                }
@@ -628,17 +627,19 @@
            };

            window.setFontSize = function (size) { // Изменение размера шрифта
+                state.currentFontSize = size;
                if (state.bookFormat === 'epub' && state.rendition) state.rendition.themes.fontSize(size + 'px');
                else if (state.bookFormat === 'fb2') {
                    const inner = $('fb2-inner');
                    if (inner) {
                        inner.style.fontSize = size + 'px';
-                        requestAnimationFrame(setupFb2Pagination); // Пересчитать страницы!
+                        requestAnimationFrame(setupFb2Pagination);
                    }
                }
            };

            window.setFontFamily = function (family) { // Изменение гарнитуры шрифта
+                state.currentFontFamily = family;
                if (state.bookFormat === 'epub' && state.rendition) state.rendition.themes.font(family);
                else if (state.bookFormat === 'fb2') {
                    const inner = $('fb2-inner');
@@ -649,7 +650,63 @@
                }
            };

-            window.goToChapter = function (href) { // Переход к главе из оглавления
+            function getThemePalette(theme) {
+                switch (theme) {
+                    case 'dark':
+                        return { background: '#181411', color: '#F4E7D8' };
+                    case 'light':
+                        return { background: '#FFFDF8', color: '#2B1B15' };
+                    default:
+                        return { background: '#FAF1E2', color: '#33231B' };
+                }
+            }
+
+            function applyReaderTheme() {
+                const palette = getThemePalette(state.currentTheme);
+                document.body.style.backgroundColor = palette.background;
+                els.bookContent.style.backgroundColor = palette.background;
+                els.fb2Content.style.backgroundColor = palette.background;
+
+                if (state.rendition) {
+                    state.rendition.themes.default({
+                        'body': {
+                            'font-family': state.currentFontFamily + ' !important',
+                            'font-size': state.currentFontSize + 'px !important',
+                            'line-height': '1.6 !important',
+                            'padding': '15px !important',
+                            'background-color': palette.background + ' !important',
+                            'color': palette.color + ' !important'
+                        },
+                        'p': { 'text-indent': '1.5em', 'margin-bottom': '0.5em' }
+                    });
+                    state.rendition.themes.fontSize(state.currentFontSize + 'px');
+                    state.rendition.themes.font(state.currentFontFamily);
+                }
+
+                const inner = $('fb2-inner');
+                if (inner) {
+                    inner.style.backgroundColor = palette.background;
+                    inner.style.color = palette.color;
+                }
+            }
+
+            function applyReaderBrightness() {
+                const brightness = Math.max(0.7, Math.min(1.2, state.brightness / 100));
+                els.bookContent.style.filter = `brightness(${brightness})`;
+                els.fb2Content.style.filter = `brightness(${brightness})`;
+            }
+
+            window.setReaderTheme = function (theme) {
+                state.currentTheme = theme || 'sepia';
+                applyReaderTheme();
+            };
+
+            window.setBrightness = function (value) {
+                state.brightness = value || 100;
+                applyReaderBrightness();
+            };
+
+            window.goToChapter = function (href) { // РџРµСЂРµС…РѕРґ Рє РіР»Р°РІРµ РёР· РѕРіР»Р°РІР»РµРЅРёСЏ
                if (state.bookFormat === 'epub' && state.rendition) state.rendition.display(href);
                else if (state.bookFormat === 'fb2') {
                    const el = $('fb2-inner').querySelector(`[data-chapter="${href}"]`);
@@ -660,7 +717,7 @@
                }
            };

-            window.getProgress = function () { // Запрос текущего состояния прогресса (в JSON)
+            window.getProgress = function () { // Р—Р°РїСЂРѕСЃ С‚РµРєСѓС‰РµРіРѕ СЃРѕСЃС‚РѕСЏРЅРёСЏ РїСЂРѕРіСЂРµСЃСЃР° (РІ JSON)
                if (state.bookFormat === 'epub' && state.book && state.currentCfi) {
                    try {
                        return JSON.stringify({
@@ -680,12 +737,14 @@
                return '{}';
            };

-            // ========== ИНИЦИАЛИЗАЦИЯ ==========
-            initTouchZones(); // Включаем зоны кликов
-            setLoadingText('Waiting for book...'); // Сообщаем, что готовы принимать файл
-            sendMessage('readerReady', {}); // Уведомляем нативное приложение: "Я загрузился!"
+            // ========== РРќРР¦РРђР›РР—РђР¦РРЇ ==========
+            initTouchZones(); // Р’РєР»СЋС‡Р°РµРј Р·РѕРЅС‹ РєР»РёРєРѕРІ
+            setLoadingText('Waiting for book...'); // РЎРѕРѕР±С‰Р°РµРј, С‡С‚Рѕ РіРѕС‚РѕРІС‹ РїСЂРёРЅРёРјР°С‚СЊ С„Р°Р№Р»
+            sendMessage('readerReady', {}); // РЈРІРµРґРѕРјР»СЏРµРј РЅР°С‚РёРІРЅРѕРµ РїСЂРёР»РѕР¶РµРЅРёРµ: "РЇ Р·Р°РіСЂСѓР·РёР»СЃСЏ!"

        })();
    </script>
 </body>
 </html>
+
+
--- a/BookReader/Resources/Styles/AppStyles.xaml
+++ b/BookReader/Resources/Styles/AppStyles.xaml
@@ -4,33 +4,141 @@
                    xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
                    xmlns:converters="clr-namespace:BookReader.Converters">

-    <!-- Converters from CommunityToolkit -->
    <toolkit:InvertedBoolConverter x:Key="InvertedBoolConverter" />
    <toolkit:IsStringNotNullOrEmptyConverter x:Key="IsNotNullOrEmptyConverter" />

-    <!-- Custom Converters -->
    <converters:ProgressToWidthConverter x:Key="ProgressToWidthConverter" />
    <converters:ByteArrayToImageSourceConverter x:Key="ByteArrayToImageConverter" />

-    <!-- Colors -->
-    <Color x:Key="PrimaryBrown">#5D4037</Color>
-    <Color x:Key="DarkBrown">#3E2723</Color>
-    <Color x:Key="LightBrown">#8D6E63</Color>
-    <Color x:Key="ShelfColor">#6D4C41</Color>
-    <Color x:Key="AccentGreen">#4CAF50</Color>
-    <Color x:Key="TextPrimary">#EFEBE9</Color>
-    <Color x:Key="TextSecondary">#A1887F</Color>
+    <Color x:Key="AppBackground">#F5E8D6</Color>
+    <Color x:Key="AppBackgroundDeep">#EBC9AE</Color>
+    <Color x:Key="SurfaceColor">#FFF8F0</Color>
+    <Color x:Key="SurfaceMuted">#F7E8D9</Color>
+    <Color x:Key="SurfaceStrong">#EED7C0</Color>
+    <Color x:Key="InkColor">#27160E</Color>
+    <Color x:Key="InkSoftColor">#6E5648</Color>
+    <Color x:Key="BorderColor">#DEC2AA</Color>
+    <Color x:Key="AccentColor">#A65436</Color>
+    <Color x:Key="AccentDarkColor">#6F311D</Color>
+    <Color x:Key="AccentSoftColor">#DFA98D</Color>
+    <Color x:Key="SuccessColor">#2F7D5A</Color>
+    <Color x:Key="WarningColor">#C47A3E</Color>
+    <Color x:Key="DangerColor">#B64932</Color>
+    <Color x:Key="TabBarColor">#2B1B15</Color>
+
+    <LinearGradientBrush x:Key="AppBackgroundBrush" StartPoint="0,0" EndPoint="1,1">
+        <GradientStop Color="{StaticResource AppBackground}" Offset="0.0" />
+        <GradientStop Color="{StaticResource AppBackgroundDeep}" Offset="1.0" />
+    </LinearGradientBrush>

-    <!-- Styles -->
    <Style TargetType="NavigationPage">
-        <Setter Property="BarBackgroundColor" Value="{StaticResource DarkBrown}" />
+        <Setter Property="BarBackgroundColor" Value="{StaticResource TabBarColor}" />
        <Setter Property="BarTextColor" Value="White" />
    </Style>

    <Style TargetType="Shell">
-        <Setter Property="Shell.BackgroundColor" Value="{StaticResource DarkBrown}" />
+        <Setter Property="Shell.BackgroundColor" Value="{StaticResource TabBarColor}" />
        <Setter Property="Shell.ForegroundColor" Value="White" />
        <Setter Property="Shell.TitleColor" Value="White" />
+        <Setter Property="Shell.TabBarBackgroundColor" Value="{StaticResource TabBarColor}" />
+        <Setter Property="Shell.TabBarForegroundColor" Value="#C9B4A6" />
+        <Setter Property="Shell.TabBarTitleColor" Value="#C9B4A6" />
+        <Setter Property="Shell.TabBarUnselectedColor" Value="#9E8474" />
    </Style>

-</ResourceDictionary>
+    <Style x:Key="PageTitleStyle" TargetType="Label">
+        <Setter Property="FontSize" Value="28" />
+        <Setter Property="FontFamily" Value="OpenSansSemibold" />
+        <Setter Property="TextColor" Value="{StaticResource InkColor}" />
+        <Setter Property="LineBreakMode" Value="WordWrap" />
+    </Style>
+
+    <Style x:Key="PageSubtitleStyle" TargetType="Label">
+        <Setter Property="FontSize" Value="14" />
+        <Setter Property="TextColor" Value="{StaticResource InkSoftColor}" />
+        <Setter Property="LineBreakMode" Value="WordWrap" />
+    </Style>
+
+    <Style x:Key="SectionTitleStyle" TargetType="Label">
+        <Setter Property="FontSize" Value="18" />
+        <Setter Property="FontFamily" Value="OpenSansSemibold" />
+        <Setter Property="TextColor" Value="{StaticResource InkColor}" />
+    </Style>
+
+    <Style x:Key="CaptionStyle" TargetType="Label">
+        <Setter Property="FontSize" Value="12" />
+        <Setter Property="TextColor" Value="{StaticResource InkSoftColor}" />
+    </Style>
+
+    <Style x:Key="CardBorderStyle" TargetType="Border">
+        <Setter Property="BackgroundColor" Value="{StaticResource SurfaceColor}" />
+        <Setter Property="Stroke" Value="{StaticResource BorderColor}" />
+        <Setter Property="StrokeThickness" Value="1" />
+        <Setter Property="StrokeShape" Value="RoundRectangle 24" />
+        <Setter Property="Padding" Value="18" />
+    </Style>
+
+    <Style x:Key="MutedCardBorderStyle" TargetType="Border">
+        <Setter Property="BackgroundColor" Value="{StaticResource SurfaceMuted}" />
+        <Setter Property="Stroke" Value="{StaticResource BorderColor}" />
+        <Setter Property="StrokeThickness" Value="1" />
+        <Setter Property="StrokeShape" Value="RoundRectangle 24" />
+        <Setter Property="Padding" Value="18" />
+    </Style>
+
+    <Style x:Key="PrimaryButtonStyle" TargetType="Button">
+        <Setter Property="BackgroundColor" Value="{StaticResource AccentColor}" />
+        <Setter Property="TextColor" Value="White" />
+        <Setter Property="CornerRadius" Value="18" />
+        <Setter Property="Padding" Value="18,12" />
+        <Setter Property="FontFamily" Value="OpenSansSemibold" />
+        <Setter Property="FontSize" Value="14" />
+    </Style>
+
+    <Style x:Key="SecondaryButtonStyle" TargetType="Button">
+        <Setter Property="BackgroundColor" Value="{StaticResource SurfaceStrong}" />
+        <Setter Property="TextColor" Value="{StaticResource InkColor}" />
+        <Setter Property="CornerRadius" Value="18" />
+        <Setter Property="Padding" Value="18,12" />
+        <Setter Property="FontFamily" Value="OpenSansSemibold" />
+        <Setter Property="FontSize" Value="14" />
+        <Setter Property="BorderColor" Value="{StaticResource BorderColor}" />
+        <Setter Property="BorderWidth" Value="1" />
+    </Style>
+
+    <Style x:Key="TonalButtonStyle" TargetType="Button">
+        <Setter Property="BackgroundColor" Value="#E9D7C3" />
+        <Setter Property="TextColor" Value="{StaticResource InkColor}" />
+        <Setter Property="CornerRadius" Value="14" />
+        <Setter Property="Padding" Value="14,10" />
+        <Setter Property="FontSize" Value="13" />
+    </Style>
+
+    <Style x:Key="AppSearchBarStyle" TargetType="SearchBar">
+        <Setter Property="BackgroundColor" Value="{StaticResource SurfaceColor}" />
+        <Setter Property="TextColor" Value="{StaticResource InkColor}" />
+        <Setter Property="PlaceholderColor" Value="{StaticResource InkSoftColor}" />
+        <Setter Property="CancelButtonColor" Value="{StaticResource AccentColor}" />
+        <Setter Property="HeightRequest" Value="52" />
+    </Style>
+
+    <Style x:Key="AppEntryStyle" TargetType="Entry">
+        <Setter Property="BackgroundColor" Value="{StaticResource SurfaceColor}" />
+        <Setter Property="TextColor" Value="{StaticResource InkColor}" />
+        <Setter Property="PlaceholderColor" Value="{StaticResource InkSoftColor}" />
+        <Setter Property="HeightRequest" Value="52" />
+    </Style>
+
+    <Style x:Key="AppPickerStyle" TargetType="Picker">
+        <Setter Property="BackgroundColor" Value="{StaticResource SurfaceColor}" />
+        <Setter Property="TextColor" Value="{StaticResource InkColor}" />
+        <Setter Property="HeightRequest" Value="52" />
+        <Setter Property="TitleColor" Value="{StaticResource InkSoftColor}" />
+    </Style>
+
+    <Style x:Key="ReaderSliderStyle" TargetType="Slider">
+        <Setter Property="MinimumTrackColor" Value="{StaticResource AccentColor}" />
+        <Setter Property="MaximumTrackColor" Value="{StaticResource SurfaceStrong}" />
+        <Setter Property="ThumbColor" Value="{StaticResource AccentDarkColor}" />
+    </Style>
+</ResourceDictionary>
--- a/BookReader/Services/CalibreWebService.cs
+++ b/BookReader/Services/CalibreWebService.cs
@@ -10,8 +10,6 @@ public class CalibreWebService : ICalibreWebService
    private readonly HttpClient _httpClient;
    private readonly ICoverCacheService _coverCacheService;
    private string _baseUrl = string.Empty;
-    private string _username = string.Empty;
-    private string _password = string.Empty;

    public CalibreWebService(HttpClient httpClient, ICoverCacheService coverCacheService)
    {
@@ -22,16 +20,18 @@ public class CalibreWebService : ICalibreWebService

    public void Configure(string url, string username, string password)
    {
-        _baseUrl = url.TrimEnd('/');
-        _username = username;
-        _password = password;
+        _baseUrl = url.Trim().TrimEnd('/');

-        if (!string.IsNullOrEmpty(_username))
+        if (!string.IsNullOrWhiteSpace(username))
        {
-            var authBytes = Encoding.ASCII.GetBytes($"{_username}:{_password}");
+            var authBytes = Encoding.ASCII.GetBytes($"{username}:{password}");
            _httpClient.DefaultRequestHeaders.Authorization =
                new AuthenticationHeaderValue("Basic", Convert.ToBase64String(authBytes));
        }
+        else
+        {
+            _httpClient.DefaultRequestHeaders.Authorization = null;
+        }
    }

    public async Task<bool> TestConnectionAsync(string url, string username, string password)
@@ -48,23 +48,26 @@ public class CalibreWebService : ICalibreWebService
        }
    }

-    public async Task<List<CalibreBook>> GetBooksAsync(string? searchQuery = null, int page = 0, int pageSize = Constants.Network.CalibrePageSize)
+    public async Task<Result<List<CalibreBook>>> GetBooksAsync(string? searchQuery = null, int page = 0, int pageSize = Constants.Network.CalibrePageSize)
    {
+        if (string.IsNullOrWhiteSpace(_baseUrl))
+        {
+            return Result<List<CalibreBook>>.Failure("Сначала укажите адрес сервера Calibre в настройках.");
+        }
+
        var books = new List<CalibreBook>();

        try
        {
            var offset = page * pageSize;
-            var query = string.IsNullOrEmpty(searchQuery) ? "" : Uri.EscapeDataString(searchQuery);
+            var query = string.IsNullOrWhiteSpace(searchQuery) ? string.Empty : Uri.EscapeDataString(searchQuery.Trim());
            var url = $"{_baseUrl}/ajax/search?query={query}&num={pageSize}&offset={offset}&sort=timestamp&sort_order=desc";

            var response = await _httpClient.GetStringAsync(url);
            var json = JObject.Parse(response);
-
            var bookIds = json["book_ids"]?.ToObject<List<int>>() ?? new List<int>();

-            // Параллельная загрузка данных книг с ограничением
-            var semaphore = new SemaphoreSlim(4); // Максимум 4 параллельных запроса
+            var semaphore = new SemaphoreSlim(4);
            var tasks = bookIds.Select(async bookId =>
            {
                await semaphore.WaitAsync();
@@ -79,14 +82,22 @@ public class CalibreWebService : ICalibreWebService
            });

            var results = await Task.WhenAll(tasks);
-            books.AddRange(results.Where(b => b != null)!);
+            books.AddRange(results.Where(book => book != null)!);
+
+            return Result<List<CalibreBook>>.Success(books);
+        }
+        catch (TaskCanceledException ex)
+        {
+            return Result<List<CalibreBook>>.Failure(new TimeoutException("Сервер Calibre отвечает слишком долго.", ex));
+        }
+        catch (HttpRequestException ex)
+        {
+            return Result<List<CalibreBook>>.Failure(new HttpRequestException("Не удалось подключиться к серверу Calibre.", ex));
        }
        catch (Exception ex)
        {
-            System.Diagnostics.Debug.WriteLine($"Error fetching Calibre books: {ex.Message}");
+            return Result<List<CalibreBook>>.Failure(new Exception("Не удалось загрузить каталог Calibre.", ex));
        }
-
-        return books;
    }

    private async Task<CalibreBook?> LoadBookDataAsync(int bookId)
@@ -98,25 +109,27 @@ public class CalibreWebService : ICalibreWebService
            var bookJson = JObject.Parse(bookResponse);

            var formats = bookJson["formats"]?.ToObject<List<string>>() ?? new List<string>();
-            var supportedFormat = formats.FirstOrDefault(f =>
-                f.Equals("EPUB", StringComparison.OrdinalIgnoreCase) ||
-                f.Equals("FB2", StringComparison.OrdinalIgnoreCase));
+            var supportedFormat = formats.FirstOrDefault(format =>
+                format.Equals("EPUB", StringComparison.OrdinalIgnoreCase) ||
+                format.Equals("FB2", StringComparison.OrdinalIgnoreCase));

-            if (supportedFormat == null) return null;
+            if (supportedFormat == null)
+            {
+                return null;
+            }

            var authors = bookJson["authors"]?.ToObject<List<string>>() ?? new List<string>();

            var calibreBook = new CalibreBook
            {
                Id = bookId.ToString(),
-                Title = bookJson["title"]?.ToString() ?? "Unknown",
+                Title = bookJson["title"]?.ToString() ?? "Без названия",
                Author = string.Join(", ", authors),
                Format = supportedFormat.ToLowerInvariant(),
                CoverUrl = $"{_baseUrl}/get/cover/{bookId}",
                DownloadUrl = $"{_baseUrl}/get/{supportedFormat}/{bookId}"
            };

-            // Try to load cover from cache first
            var cacheKey = $"cover_{bookId}";
            calibreBook.CoverImage = await _coverCacheService.GetCoverAsync(cacheKey);

@@ -127,7 +140,9 @@ public class CalibreWebService : ICalibreWebService
                    calibreBook.CoverImage = await _httpClient.GetByteArrayAsync(calibreBook.CoverUrl);
                    await _coverCacheService.SetCoverAsync(cacheKey, calibreBook.CoverImage);
                }
-                catch { }
+                catch
+                {
+                }
            }

            return calibreBook;
@@ -140,7 +155,7 @@ public class CalibreWebService : ICalibreWebService

    public async Task<string> DownloadBookAsync(CalibreBook book, IProgress<double>? progress = null)
    {
-        var booksDir = Path.Combine(FileSystem.AppDataDirectory, "Books");
+        var booksDir = Path.Combine(FileSystem.AppDataDirectory, Constants.Files.BooksFolder);
        Directory.CreateDirectory(booksDir);

        var fileName = $"{Guid.NewGuid()}.{book.Format}";
@@ -164,9 +179,11 @@ public class CalibreWebService : ICalibreWebService
            bytesRead += read;

            if (totalBytes > 0)
+            {
                progress?.Report((double)bytesRead / totalBytes);
+            }
        }

        return filePath;
    }
-}
+}
--- a/BookReader/Services/DatabaseService.cs
+++ b/BookReader/Services/DatabaseService.cs
@@ -13,16 +13,16 @@ public class DatabaseService : IDatabaseService

    public DatabaseService()
    {
-        _dbPath = Path.Combine(FileSystem.AppDataDirectory, "bookreader.db3");
-        
-        // Polly 8.x retry pipeline: 3 попытки с экспоненциальной задержкой
+        _dbPath = Path.Combine(FileSystem.AppDataDirectory, Constants.Database.DatabaseFileName);
+
        _retryPipeline = new ResiliencePipelineBuilder()
            .AddRetry(new RetryStrategyOptions
            {
                ShouldHandle = new PredicateBuilder().Handle<SQLiteException>()
                    .Handle<Exception>(ex => ex.Message.Contains("database is locked") || ex.Message.Contains("busy")),
-                MaxRetryAttempts = 3,
-                DelayGenerator = context => new ValueTask<TimeSpan?>(TimeSpan.FromMilliseconds(100 * Math.Pow(2, context.AttemptNumber))),
+                MaxRetryAttempts = Constants.Database.RetryCount,
+                DelayGenerator = context => new ValueTask<TimeSpan?>(
+                    TimeSpan.FromMilliseconds(Constants.Database.RetryBaseDelayMs * Math.Pow(2, context.AttemptNumber))),
                OnRetry = context =>
                {
                    System.Diagnostics.Debug.WriteLine($"[Database] Retry {context.AttemptNumber + 1} after {context.RetryDelay.TotalMilliseconds}ms: {context.Outcome.Exception?.Message}");
@@ -34,11 +34,14 @@ public class DatabaseService : IDatabaseService

    public async Task InitializeAsync(CancellationToken ct = default)
    {
-        if (_database != null) return;
+        if (_database != null)
+        {
+            return;
+        }

        _database = new SQLiteAsyncConnection(_dbPath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create | SQLiteOpenFlags.SharedCache);

-        await _retryPipeline.ExecuteAsync(async (token) =>
+        await _retryPipeline.ExecuteAsync(async _ =>
        {
            await _database!.CreateTableAsync<Book>();
            await _database!.CreateTableAsync<AppSettings>();
@@ -49,31 +52,35 @@ public class DatabaseService : IDatabaseService
    private async Task EnsureInitializedAsync()
    {
        if (_database == null)
+        {
            await InitializeAsync();
+        }
    }

-    // Books
    public async Task<List<Book>> GetAllBooksAsync(CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        return await _retryPipeline.ExecuteAsync(async (token) =>
-            await _database!.Table<Book>().OrderByDescending(b => b.LastRead).ToListAsync(), ct);
+        return await _retryPipeline.ExecuteAsync(async _ =>
+            await _database!.Table<Book>().OrderByDescending(book => book.LastRead).ToListAsync(), ct);
    }

    public async Task<Book?> GetBookByIdAsync(int id, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        return await _retryPipeline.ExecuteAsync(async (token) =>
-            await _database!.Table<Book>().Where(b => b.Id == id).FirstOrDefaultAsync(), ct);
+        return await _retryPipeline.ExecuteAsync(async _ =>
+            await _database!.Table<Book>().Where(book => book.Id == id).FirstOrDefaultAsync(), ct);
    }

    public async Task<int> SaveBookAsync(Book book, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        return await _retryPipeline.ExecuteAsync(async (token) =>
+        return await _retryPipeline.ExecuteAsync(async _ =>
        {
            if (book.Id != 0)
+            {
                return await _database!.UpdateAsync(book);
+            }
+
            return await _database!.InsertAsync(book);
        }, ct);
    }
@@ -81,35 +88,36 @@ public class DatabaseService : IDatabaseService
    public async Task<int> UpdateBookAsync(Book book, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        return await _retryPipeline.ExecuteAsync(async (token) =>
-            await _database!.UpdateAsync(book), ct);
+        return await _retryPipeline.ExecuteAsync(async _ => await _database!.UpdateAsync(book), ct);
    }

    public async Task<int> DeleteBookAsync(Book book, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();

-        // Delete associated file
        if (File.Exists(book.FilePath))
        {
-            try { File.Delete(book.FilePath); } catch { }
+            try
+            {
+                File.Delete(book.FilePath);
+            }
+            catch
+            {
+            }
        }

-        // Delete progress records
-        await _retryPipeline.ExecuteAsync(async (token) =>
-            await _database!.Table<ReadingProgress>().DeleteAsync(p => p.BookId == book.Id), ct);
+        await _retryPipeline.ExecuteAsync(async _ =>
+            await _database!.Table<ReadingProgress>().DeleteAsync(progress => progress.BookId == book.Id), ct);

-        return await _retryPipeline.ExecuteAsync(async (token) =>
-            await _database!.DeleteAsync(book), ct);
+        return await _retryPipeline.ExecuteAsync(async _ => await _database!.DeleteAsync(book), ct);
    }

-    // Settings
    public async Task<string?> GetSettingAsync(string key, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        return await _retryPipeline.ExecuteAsync(async (token) =>
+        return await _retryPipeline.ExecuteAsync(async _ =>
        {
-            var setting = await _database!.Table<AppSettings>().Where(s => s.Key == key).FirstOrDefaultAsync();
+            var setting = await _database!.Table<AppSettings>().Where(item => item.Key == key).FirstOrDefaultAsync();
            return setting?.Value;
        }, ct);
    }
@@ -117,9 +125,9 @@ public class DatabaseService : IDatabaseService
    public async Task SetSettingAsync(string key, string value, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        await _retryPipeline.ExecuteAsync(async (token) =>
+        await _retryPipeline.ExecuteAsync(async _ =>
        {
-            var existing = await _database!.Table<AppSettings>().Where(s => s.Key == key).FirstOrDefaultAsync();
+            var existing = await _database!.Table<AppSettings>().Where(item => item.Key == key).FirstOrDefaultAsync();
            if (existing != null)
            {
                existing.Value = value;
@@ -135,31 +143,42 @@ public class DatabaseService : IDatabaseService
    public async Task<Dictionary<string, string>> GetAllSettingsAsync(CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        return await _retryPipeline.ExecuteAsync(async (token) =>
+        return await _retryPipeline.ExecuteAsync(async _ =>
        {
            var settings = await _database!.Table<AppSettings>().ToListAsync();
-            return settings.ToDictionary(s => s.Key, s => s.Value);
+            return settings.ToDictionary(setting => setting.Key, setting => setting.Value);
        }, ct);
    }

-    // Reading Progress
    public async Task SaveProgressAsync(ReadingProgress progress, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        await _retryPipeline.ExecuteAsync(async (token) =>
+        await _retryPipeline.ExecuteAsync(async _ =>
        {
            progress.Timestamp = DateTime.UtcNow;
            await _database!.InsertAsync(progress);
+            await _database.ExecuteAsync(
+                @"DELETE FROM ReadingProgress
+                  WHERE BookId = ?
+                    AND Id NOT IN (
+                        SELECT Id FROM ReadingProgress
+                        WHERE BookId = ?
+                        ORDER BY Timestamp DESC
+                        LIMIT ?
+                    )",
+                progress.BookId,
+                progress.BookId,
+                Constants.Database.MaxReadingHistoryEntriesPerBook);
        }, ct);
    }

    public async Task<ReadingProgress?> GetLatestProgressAsync(int bookId, CancellationToken ct = default)
    {
        await EnsureInitializedAsync();
-        return await _retryPipeline.ExecuteAsync(async (token) =>
+        return await _retryPipeline.ExecuteAsync(async _ =>
            await _database!.Table<ReadingProgress>()
-                .Where(p => p.BookId == bookId)
-                .OrderByDescending(p => p.Timestamp)
+                .Where(progress => progress.BookId == bookId)
+                .OrderByDescending(progress => progress.Timestamp)
                .FirstOrDefaultAsync(), ct);
    }
-}
+}
--- a/BookReader/Services/ICalibreWebService.cs
+++ b/BookReader/Services/ICalibreWebService.cs
@@ -5,7 +5,7 @@ namespace BookReader.Services;
 public interface ICalibreWebService
 {
    Task<bool> TestConnectionAsync(string url, string username, string password);
-    Task<List<CalibreBook>> GetBooksAsync(string? searchQuery = null, int page = 0, int pageSize = 20);
+    Task<Result<List<CalibreBook>>> GetBooksAsync(string? searchQuery = null, int page = 0, int pageSize = 20);
    Task<string> DownloadBookAsync(CalibreBook book, IProgress<double>? progress = null);
    void Configure(string url, string username, string password);
-}
+}
--- a/BookReader/Services/ISettingsService.cs
+++ b/BookReader/Services/ISettingsService.cs
@@ -6,10 +6,11 @@ public interface ISettingsService
    Task SetAsync(string key, string value);
    Task<int> GetIntAsync(string key, int defaultValue = 0);
    Task SetIntAsync(string key, int value);
+    Task<double> GetDoubleAsync(string key, double defaultValue = 0);
+    Task SetDoubleAsync(string key, double value);
    Task<Dictionary<string, string>> GetAllAsync();
-    
-    // Secure storage for sensitive data
+
    Task SetSecurePasswordAsync(string password);
    Task<string> GetSecurePasswordAsync();
    Task ClearSecurePasswordAsync();
-}
+}
--- a/BookReader/Services/SettingsService.cs
+++ b/BookReader/Services/SettingsService.cs
@@ -1,4 +1,5 @@
 using BookReader.Models;
+using System.Globalization;

 namespace BookReader.Services;

@@ -26,13 +27,32 @@ public class SettingsService : ISettingsService
    {
        var value = await _databaseService.GetSettingAsync(key);
        if (int.TryParse(value, out var result))
+        {
            return result;
+        }
+
        return defaultValue;
    }

    public async Task SetIntAsync(string key, int value)
    {
-        await _databaseService.SetSettingAsync(key, value.ToString());
+        await _databaseService.SetSettingAsync(key, value.ToString(CultureInfo.InvariantCulture));
+    }
+
+    public async Task<double> GetDoubleAsync(string key, double defaultValue = 0)
+    {
+        var value = await _databaseService.GetSettingAsync(key);
+        if (double.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out var result))
+        {
+            return result;
+        }
+
+        return defaultValue;
+    }
+
+    public async Task SetDoubleAsync(string key, double value)
+    {
+        await _databaseService.SetSettingAsync(key, value.ToString(CultureInfo.InvariantCulture));
    }

    public async Task<Dictionary<string, string>> GetAllAsync()
@@ -47,7 +67,7 @@ public class SettingsService : ISettingsService

    public async Task<string> GetSecurePasswordAsync()
    {
-        return await SecureStorage.Default.GetAsync(SecureStorageKeys.CalibrePassword);
+        return await SecureStorage.Default.GetAsync(SecureStorageKeys.CalibrePassword) ?? string.Empty;
    }

    public async Task ClearSecurePasswordAsync()
@@ -55,4 +75,5 @@ public class SettingsService : ISettingsService
        SecureStorage.Default.Remove(SecureStorageKeys.CalibrePassword);
        await Task.CompletedTask;
    }
-}
+}
+
--- a/BookReader/ViewModels/BookshelfViewModel.cs
+++ b/BookReader/ViewModels/BookshelfViewModel.cs
@@ -10,9 +10,7 @@ public partial class BookshelfViewModel : BaseViewModel
 {
    private readonly IDatabaseService _databaseService;
    private readonly IBookParserService _bookParserService;
-    private readonly ISettingsService _settingsService;
    private readonly INavigationService _navigationService;
-    private readonly ICachedImageLoadingService _imageLoadingService;

    public ObservableCollection<Book> Books { get; } = new();

@@ -22,29 +20,40 @@ public partial class BookshelfViewModel : BaseViewModel
    [ObservableProperty]
    private string _searchText = string.Empty;

+    [ObservableProperty]
+    private int _booksInProgress;
+
+    [ObservableProperty]
+    private int _completedBooks;
+
+    [ObservableProperty]
+    private Book? _continueReadingBook;
+
+    public bool HasContinueReading => ContinueReadingBook != null;
+    public string LibrarySummary => $"{Books.Count} книг в библиотеке";
+
    partial void OnSearchTextChanged(string value)
    {
-        // Автоматически выполняем поиск при изменении текста
        if (string.IsNullOrWhiteSpace(value))
        {
-            // Если поле пустое - загружаем все книги
            LoadBooksCommand.Execute(null);
        }
    }

+    partial void OnContinueReadingBookChanged(Book? value)
+    {
+        OnPropertyChanged(nameof(HasContinueReading));
+    }
+
    public BookshelfViewModel(
        IDatabaseService databaseService,
        IBookParserService bookParserService,
-        ISettingsService settingsService,
-        INavigationService navigationService,
-        ICachedImageLoadingService imageLoadingService)
+        INavigationService navigationService)
    {
        _databaseService = databaseService;
        _bookParserService = bookParserService;
-        _settingsService = settingsService;
        _navigationService = navigationService;
-        _imageLoadingService = imageLoadingService;
-        Title = "My Library";
+        Title = "Библиотека";
    }

    [RelayCommand]
@@ -56,14 +65,13 @@ public partial class BookshelfViewModel : BaseViewModel
        {
            var books = await _databaseService.GetAllBooksAsync();

-            // Применяем фильтр поиска если есть
            if (!string.IsNullOrWhiteSpace(SearchText))
            {
-                var searchLower = SearchText.ToLowerInvariant();
-                books = books.Where(b =>
-                    b.Title.ToLowerInvariant().Contains(searchLower) ||
-                    b.Author.ToLowerInvariant().Contains(searchLower)
-                ).ToList();
+                var searchLower = SearchText.Trim().ToLowerInvariant();
+                books = books.Where(book =>
+                        book.Title.ToLowerInvariant().Contains(searchLower) ||
+                        book.Author.ToLowerInvariant().Contains(searchLower))
+                    .ToList();
            }

            Books.Clear();
@@ -71,11 +79,12 @@ public partial class BookshelfViewModel : BaseViewModel
            {
                Books.Add(book);
            }
-            IsEmpty = Books.Count == 0;
+
+            RefreshLibraryState();
        }
        catch (Exception ex)
        {
-            System.Diagnostics.Debug.WriteLine($"Error loading books: {ex.Message}");
+            await _navigationService.DisplayAlertAsync("Ошибка", $"Не удалось загрузить библиотеку: {ex.Message}", "OK");
        }
        finally
        {
@@ -86,15 +95,8 @@ public partial class BookshelfViewModel : BaseViewModel
    [RelayCommand]
    public async Task SearchAsync(object? parameter)
    {
-        // Если параметр пустой или null, используем текущий SearchText
-        var searchText = parameter?.ToString() ?? SearchText;
-        
-        if (string.IsNullOrWhiteSpace(searchText))
-        {
-            // Очищаем поиск и загружаем все книги
-            SearchText = string.Empty;
-        }
-        
+        var requestedText = parameter?.ToString() ?? SearchText;
+        SearchText = requestedText ?? string.Empty;
        await LoadBooksAsync();
    }

@@ -110,42 +112,47 @@ public partial class BookshelfViewModel : BaseViewModel

            var result = await FilePicker.Default.PickAsync(new PickOptions
            {
-                PickerTitle = "Select a book",
+                PickerTitle = "Выберите книгу",
                FileTypes = customFileTypes
            });

-            if (result == null) return;
+            if (result == null)
+            {
+                return;
+            }

            var extension = Path.GetExtension(result.FileName).ToLowerInvariant();
-            if (extension != ".epub" && extension != ".fb2")
+            if (extension != Constants.Files.EpubExtension && extension != Constants.Files.Fb2Extension)
            {
-                await _navigationService.DisplayAlertAsync("Error", "Only EPUB and FB2 formats are supported.", "OK");
+                await _navigationService.DisplayAlertAsync("Формат не поддерживается", "Сейчас можно добавить только EPUB и FB2.", "OK");
                return;
            }

            IsBusy = true;
-            StatusMessage = "Adding book...";
+            StatusMessage = "Добавляю книгу...";

-            // Copy to temp if needed and parse
-            string filePath;
-            using var stream = await result.OpenReadAsync();
+            using var sourceStream = await result.OpenReadAsync();
            var tempPath = Path.Combine(FileSystem.CacheDirectory, result.FileName);
-            using (var fileStream = File.Create(tempPath))
+            using (var tempFileStream = File.Create(tempPath))
            {
-                await stream.CopyToAsync(fileStream);
+                await sourceStream.CopyToAsync(tempFileStream);
            }
-            filePath = tempPath;

-            var book = await _bookParserService.ParseAndStoreBookAsync(filePath, result.FileName);
+            var book = await _bookParserService.ParseAndStoreBookAsync(tempPath, result.FileName);
            Books.Insert(0, book);
-            IsEmpty = false;
+            RefreshLibraryState();

-            // Clean temp
-            try { File.Delete(tempPath); } catch { }
+            try
+            {
+                File.Delete(tempPath);
+            }
+            catch
+            {
+            }
        }
        catch (Exception ex)
        {
-            await _navigationService.DisplayAlertAsync("Error", $"Failed to add book: {ex.Message}", "OK");
+            await _navigationService.DisplayAlertAsync("Ошибка", $"Не удалось добавить книгу: {ex.Message}", "OK");
        }
        finally
        {
@@ -157,29 +164,41 @@ public partial class BookshelfViewModel : BaseViewModel
    [RelayCommand]
    public async Task DeleteBookAsync(Book book)
    {
-        if (book == null) return;
+        if (book == null)
+        {
+            return;
+        }

-        var confirm = await _navigationService.DisplayAlertAsync("Delete Book",
-            $"Are you sure you want to delete \"{book.Title}\"?", "Delete", "Cancel");
+        var confirmed = await _navigationService.DisplayAlertAsync(
+            "Удалить книгу",
+            $"Удалить \"{book.Title}\" из библиотеки?",
+            "Удалить",
+            "Отмена");

-        if (!confirm) return;
+        if (!confirmed)
+        {
+            return;
+        }

        try
        {
            await _databaseService.DeleteBookAsync(book);
            Books.Remove(book);
-            IsEmpty = Books.Count == 0;
+            RefreshLibraryState();
        }
        catch (Exception ex)
        {
-            await _navigationService.DisplayAlertAsync("Error", $"Failed to delete book: {ex.Message}", "OK");
+            await _navigationService.DisplayAlertAsync("Ошибка", $"Не удалось удалить книгу: {ex.Message}", "OK");
        }
    }

    [RelayCommand]
    public async Task OpenBookAsync(Book book)
    {
-        if (book == null) return;
+        if (book == null)
+        {
+            return;
+        }

        var navigationParameter = new Dictionary<string, object>
        {
@@ -190,14 +209,20 @@ public partial class BookshelfViewModel : BaseViewModel
    }

    [RelayCommand]
-    public async Task OpenSettingsAsync()
-    {
-        await _navigationService.GoToAsync("settings");
-    }
+    public Task OpenSettingsAsync() => _navigationService.GoToAsync("//settings");

    [RelayCommand]
-    public async Task OpenCalibreLibraryAsync()
+    public Task OpenCalibreLibraryAsync() => _navigationService.GoToAsync("//calibre");
+
+    private void RefreshLibraryState()
    {
-        await _navigationService.GoToAsync("calibre");
+        IsEmpty = Books.Count == 0;
+        BooksInProgress = Books.Count(book => book.ReadingProgress > 0 && book.ReadingProgress < 1);
+        CompletedBooks = Books.Count(book => book.ReadingProgress >= 1);
+        ContinueReadingBook = Books
+            .OrderByDescending(book => book.LastRead)
+            .FirstOrDefault(book => book.ReadingProgress > 0 && book.ReadingProgress < 1);
+
+        OnPropertyChanged(nameof(LibrarySummary));
    }
-}
+}
--- a/BookReader/ViewModels/CalibreLibraryViewModel.cs
+++ b/BookReader/ViewModels/CalibreLibraryViewModel.cs
@@ -13,7 +13,6 @@ public partial class CalibreLibraryViewModel : BaseViewModel
    private readonly IDatabaseService _databaseService;
    private readonly ISettingsService _settingsService;
    private readonly INavigationService _navigationService;
-    private readonly ICachedImageLoadingService _imageLoadingService;

    public ObservableCollection<CalibreBook> Books { get; } = new();

@@ -34,21 +33,27 @@ public partial class CalibreLibraryViewModel : BaseViewModel

    private int _currentPage;

+    public bool HasConnectionError => !string.IsNullOrWhiteSpace(ConnectionErrorMessage);
+    public bool HasBooks => Books.Count > 0;
+
+    partial void OnConnectionErrorMessageChanged(string value)
+    {
+        OnPropertyChanged(nameof(HasConnectionError));
+    }
+
    public CalibreLibraryViewModel(
        ICalibreWebService calibreWebService,
        IBookParserService bookParserService,
        IDatabaseService databaseService,
        ISettingsService settingsService,
-        INavigationService navigationService,
-        ICachedImageLoadingService imageLoadingService)
+        INavigationService navigationService)
    {
        _calibreWebService = calibreWebService;
        _bookParserService = bookParserService;
        _databaseService = databaseService;
        _settingsService = settingsService;
        _navigationService = navigationService;
-        _imageLoadingService = imageLoadingService;
-        Title = "Calibre Library";
+        Title = "Calibre";
    }

    [RelayCommand]
@@ -59,35 +64,42 @@ public partial class CalibreLibraryViewModel : BaseViewModel
        var password = await _settingsService.GetSecurePasswordAsync();

        IsConfigured = !string.IsNullOrWhiteSpace(url);
+        ConnectionErrorMessage = string.Empty;

        if (IsConfigured)
        {
            _calibreWebService.Configure(url, username, password);
            await LoadBooksAsync();
        }
+        else
+        {
+            Books.Clear();
+        }
    }

    [RelayCommand]
    public async Task LoadBooksAsync()
    {
-        if (IsBusy || !IsConfigured) return;
+        if (IsBusy || !IsConfigured)
+        {
+            return;
+        }
+
        IsBusy = true;
        _currentPage = 0;
        ConnectionErrorMessage = string.Empty;

        try
        {
-            var books = await _calibreWebService.GetBooksAsync(SearchQuery, _currentPage);
-            Books.Clear();
-            foreach (var book in books)
+            var result = await _calibreWebService.GetBooksAsync(SearchQuery, _currentPage);
+            if (!result.IsSuccess)
            {
-                Books.Add(book);
+                Books.Clear();
+                ConnectionErrorMessage = result.ErrorMessage ?? "Не удалось загрузить каталог Calibre.";
+                return;
            }
-        }
-        catch (Exception ex)
-        {
-            ConnectionErrorMessage = "No connection to Calibre server";
-            System.Diagnostics.Debug.WriteLine($"Error loading Calibre library: {ex.Message}");
+
+            ReplaceBooks(result.Value ?? new List<CalibreBook>());
        }
        finally
        {
@@ -98,7 +110,11 @@ public partial class CalibreLibraryViewModel : BaseViewModel
    [RelayCommand]
    public async Task RefreshBooksAsync()
    {
-        if (IsRefreshing || !IsConfigured) return;
+        if (IsRefreshing || !IsConfigured)
+        {
+            return;
+        }
+
        IsRefreshing = true;

        try
@@ -114,19 +130,32 @@ public partial class CalibreLibraryViewModel : BaseViewModel
    [RelayCommand]
    public async Task LoadMoreBooksAsync()
    {
-        if (IsBusy || !IsConfigured) return;
+        if (IsBusy || !IsConfigured || HasConnectionError)
+        {
+            return;
+        }
+
        IsBusy = true;
        _currentPage++;

        try
        {
-            var books = await _calibreWebService.GetBooksAsync(SearchQuery, _currentPage);
-            foreach (var book in books)
+            var result = await _calibreWebService.GetBooksAsync(SearchQuery, _currentPage);
+            if (!result.IsSuccess)
            {
-                Books.Add(book);
+                DownloadStatus = result.ErrorMessage ?? "Не удалось подгрузить ещё книги.";
+                return;
+            }
+
+            var existingIds = Books.Select(book => book.Id).ToHashSet();
+            foreach (var book in result.Value ?? new List<CalibreBook>())
+            {
+                if (existingIds.Add(book.Id))
+                {
+                    Books.Add(book);
+                }
            }
        }
-        catch { }
        finally
        {
            IsBusy = false;
@@ -142,16 +171,19 @@ public partial class CalibreLibraryViewModel : BaseViewModel
    [RelayCommand]
    public async Task DownloadBookAsync(CalibreBook calibreBook)
    {
-        if (calibreBook == null) return;
+        if (calibreBook == null)
+        {
+            return;
+        }

        IsBusy = true;
-        DownloadStatus = $"Downloading {calibreBook.Title}...";
+        DownloadStatus = $"Загрузка: {calibreBook.Title}";

        try
        {
-            var progress = new Progress<double>(p =>
+            var progress = new Progress<double>(value =>
            {
-                DownloadStatus = $"Downloading... {p * 100:F0}%";
+                DownloadStatus = $"Загрузка: {value * 100:F0}%";
            });

            var filePath = await _calibreWebService.DownloadBookAsync(calibreBook, progress);
@@ -161,27 +193,36 @@ public partial class CalibreLibraryViewModel : BaseViewModel
            book.CalibreId = calibreBook.Id;

            if (calibreBook.CoverImage != null)
+            {
                book.CoverImage = calibreBook.CoverImage;
+            }

            await _databaseService.UpdateBookAsync(book);

-            DownloadStatus = "Download complete!";
-            await _navigationService.DisplayAlertAsync("Success", $"\"{calibreBook.Title}\" has been added to your library.", "OK");
+            DownloadStatus = "Книга добавлена в библиотеку";
+            await _navigationService.DisplayAlertAsync("Готово", $"\"{calibreBook.Title}\" добавлена в библиотеку.", "OK");
        }
        catch (Exception ex)
        {
-            await _navigationService.DisplayAlertAsync("Error", $"Failed to download: {ex.Message}", "OK");
+            await _navigationService.DisplayAlertAsync("Ошибка", $"Не удалось скачать книгу: {ex.Message}", "OK");
        }
        finally
        {
            IsBusy = false;
-            DownloadStatus = string.Empty;
        }
    }

    [RelayCommand]
-    public async Task OpenSettingsAsync()
+    public Task OpenSettingsAsync() => _navigationService.GoToAsync("//settings");
+
+    private void ReplaceBooks(IEnumerable<CalibreBook> books)
    {
-        await _navigationService.GoToAsync("settings");
+        Books.Clear();
+        foreach (var book in books)
+        {
+            Books.Add(book);
+        }
+
+        OnPropertyChanged(nameof(HasBooks));
    }
-}
+}
--- a/BookReader/ViewModels/ReaderViewModel.cs
+++ b/BookReader/ViewModels/ReaderViewModel.cs
@@ -1,5 +1,4 @@
-using Android.Graphics.Fonts;
-using BookReader.Models;
+using BookReader.Models;
 using BookReader.Services;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
@@ -11,7 +10,13 @@ public partial class ReaderViewModel : BaseViewModel
 {
    private readonly IDatabaseService _databaseService;
    private readonly ISettingsService _settingsService;
-    private readonly INavigationService _navigationService;
+
+    private double _lastPersistedProgress = -1;
+    private string _lastPersistedCfi = string.Empty;
+    private string _lastPersistedChapter = string.Empty;
+    private int _lastPersistedCurrentPage = -1;
+    private int _lastPersistedTotalPages = -1;
+    private DateTime _lastPersistedAt = DateTime.MinValue;

    [ObservableProperty]
    private Book? _book;
@@ -28,6 +33,12 @@ public partial class ReaderViewModel : BaseViewModel
    [ObservableProperty]
    private string _fontFamily = "serif";

+    [ObservableProperty]
+    private string _readerTheme = Constants.Reader.DefaultTheme;
+
+    [ObservableProperty]
+    private double _brightness = Constants.Reader.DefaultBrightness;
+
    [ObservableProperty]
    private List<string> _chapters = new();

@@ -44,19 +55,18 @@ public partial class ReaderViewModel : BaseViewModel
    private int _currentPage = 1;

    [ObservableProperty]
-    private int _totalPages = 1;
+    private int _totalPages = 100;

-    // Это свойство будет обновляться автоматически при изменении любого из полей выше
-    public string ChapterProgressText => $"{ChapterCurrentPage} из {ChapterTotalPages}";
+    public string ChapterProgressText => ChapterTotalPages > 1
+        ? $"Глава: {ChapterCurrentPage} из {ChapterTotalPages}"
+        : "Позиция внутри главы появится после перелистывания";

-    // Это свойство показывает процент прогресса
-    public string ProgressText => $"{CurrentPage}%";
+    public string ProgressText => TotalPages == 100
+        ? $"{CurrentPage}%"
+        : $"Стр. {CurrentPage} из {TotalPages}";

-    // Чтобы ChapterProgressText уведомлял интерфейс, добавим частичные методы (особенность Toolkit)
    partial void OnChapterCurrentPageChanged(int value) => OnPropertyChanged(nameof(ChapterProgressText));
    partial void OnChapterTotalPagesChanged(int value) => OnPropertyChanged(nameof(ChapterProgressText));
-
-    // Чтобы ProgressText уведомлял интерфейс, добавим частичные методы (особенность Toolkit)
    partial void OnCurrentPageChanged(int value) => OnPropertyChanged(nameof(ProgressText));
    partial void OnTotalPagesChanged(int value) => OnPropertyChanged(nameof(ProgressText));

@@ -78,42 +88,40 @@ public partial class ReaderViewModel : BaseViewModel
        12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 36, 40
    };

-    // Events for the view to subscribe to
    public event Action<string>? OnJavaScriptRequested;
-    public event Action? OnBookReady;

    public ReaderViewModel(
        IDatabaseService databaseService,
-        ISettingsService settingsService,
-        INavigationService navigationService)
+        ISettingsService settingsService)
    {
        _databaseService = databaseService;
        _settingsService = settingsService;
-        _navigationService = navigationService;
        _fontSize = Constants.Reader.DefaultFontSize;
    }

    public async Task InitializeAsync()
    {
-        // Валидация: книга должна быть загружена
        if (Book == null)
        {
            System.Diagnostics.Debug.WriteLine("[ReaderViewModel] Book is null, cannot initialize");
            return;
        }

-        // Валидация: файл книги должен существовать
        if (!File.Exists(Book.FilePath))
        {
            System.Diagnostics.Debug.WriteLine($"[ReaderViewModel] Book file not found: {Book.FilePath}");
            return;
        }

-        var savedFontSize = await _settingsService.GetIntAsync(SettingsKeys.DefaultFontSize, Constants.Reader.DefaultFontSize);
-        var savedFontFamily = await _settingsService.GetAsync(SettingsKeys.DefaultFontFamily, "serif");
+        FontSize = await _settingsService.GetIntAsync(SettingsKeys.DefaultFontSize, Constants.Reader.DefaultFontSize);
+        FontFamily = await _settingsService.GetAsync(SettingsKeys.DefaultFontFamily, "serif");
+        ReaderTheme = await _settingsService.GetAsync(SettingsKeys.Theme, Constants.Reader.DefaultTheme);
+        Brightness = await _settingsService.GetDoubleAsync(SettingsKeys.Brightness, Constants.Reader.DefaultBrightness);

-        FontSize = savedFontSize;
-        FontFamily = savedFontFamily;
+        CurrentPage = Book.CurrentPage > 0 ? Book.CurrentPage : 1;
+        TotalPages = Book.TotalPages > 0 ? Book.TotalPages : 100;
+
+        RememberPersistedProgress(Book.ReadingProgress, Book.LastCfi, Book.LastChapter, Book.CurrentPage, Book.TotalPages);
    }

    [RelayCommand]
@@ -121,7 +129,9 @@ public partial class ReaderViewModel : BaseViewModel
    {
        IsMenuVisible = !IsMenuVisible;
        if (!IsMenuVisible)
+        {
            IsChapterListVisible = false;
+        }
    }

    [RelayCommand]
@@ -149,14 +159,34 @@ public partial class ReaderViewModel : BaseViewModel
    public void ChangeFontFamily(string family)
    {
        FontFamily = family;
-        OnJavaScriptRequested?.Invoke($"setFontFamily('{family}')");
+        OnJavaScriptRequested?.Invoke($"setFontFamily('{EscapeJs(family)}')");
        _ = _settingsService.SetAsync(SettingsKeys.DefaultFontFamily, family);
    }

+    [RelayCommand]
+    public void ChangeReaderTheme(string theme)
+    {
+        ReaderTheme = theme;
+        OnJavaScriptRequested?.Invoke($"setReaderTheme('{EscapeJs(theme)}')");
+        _ = _settingsService.SetAsync(SettingsKeys.Theme, theme);
+    }
+
+    [RelayCommand]
+    public void ChangeBrightness(double brightness)
+    {
+        Brightness = Math.Clamp(brightness, Constants.Reader.MinBrightness, Constants.Reader.MaxBrightness);
+        OnJavaScriptRequested?.Invoke($"setBrightness({Brightness.ToString(System.Globalization.CultureInfo.InvariantCulture)})");
+        _ = _settingsService.SetDoubleAsync(SettingsKeys.Brightness, Brightness);
+    }
+
    [RelayCommand]
    public void GoToChapter(string chapter)
    {
-        if (string.IsNullOrEmpty(chapter)) return;
+        if (string.IsNullOrEmpty(chapter))
+        {
+            return;
+        }
+
        OnJavaScriptRequested?.Invoke($"goToChapter('{EscapeJs(chapter)}')");
        IsChapterListVisible = false;
        IsMenuVisible = false;
@@ -169,11 +199,12 @@ public partial class ReaderViewModel : BaseViewModel
            System.Diagnostics.Debug.WriteLine("[ReaderViewModel] Cannot save locations: Book is null");
            return;
        }
+
        Book.Locations = locations;
        await _databaseService.UpdateBookAsync(Book);
    }

-    public async Task SaveProgressAsync(double progress, string? cfi, string? chapter, int currentPage, int totalPages)
+    public async Task SaveProgressAsync(double progress, string? cfi, string? chapter, int currentPage, int totalPages, bool force = false)
    {
        if (Book == null)
        {
@@ -181,8 +212,13 @@ public partial class ReaderViewModel : BaseViewModel
            return;
        }

-        // Важно: если CFI пустой, не перезаписываем старый прогресс (защита от багов JS)
-        if (string.IsNullOrEmpty(cfi) && progress <= 0) return;
+        if (string.IsNullOrEmpty(cfi) && progress <= 0)
+        {
+            return;
+        }
+
+        CurrentPage = currentPage > 0 ? currentPage : CurrentPage;
+        TotalPages = totalPages > 0 ? totalPages : TotalPages;

        Book.ReadingProgress = progress;
        Book.LastCfi = cfi;
@@ -191,6 +227,23 @@ public partial class ReaderViewModel : BaseViewModel
        Book.TotalPages = totalPages;
        Book.LastRead = DateTime.UtcNow;

+        var hasMeaningfulChange = HasMeaningfulProgressChange(progress, cfi, chapter, currentPage, totalPages);
+        if (!force)
+        {
+            var throttle = TimeSpan.FromSeconds(Constants.Reader.ProgressSaveThrottleSeconds);
+            var shouldPersistNow = hasMeaningfulChange &&
+                                   (DateTime.UtcNow - _lastPersistedAt >= throttle || Math.Abs(progress - _lastPersistedProgress) >= 0.02 || currentPage != _lastPersistedCurrentPage);
+
+            if (!shouldPersistNow)
+            {
+                return;
+            }
+        }
+        else if (!hasMeaningfulChange)
+        {
+            return;
+        }
+
        await _databaseService.UpdateBookAsync(Book);

        await _databaseService.SaveProgressAsync(new ReadingProgress
@@ -201,30 +254,35 @@ public partial class ReaderViewModel : BaseViewModel
            CurrentPage = currentPage,
            ChapterTitle = chapter
        });
+
+        RememberPersistedProgress(progress, cfi, chapter, currentPage, totalPages);
    }

-    public string GetBookFilePath()
+    public string? GetLastCfi() => Book?.LastCfi;
+
+    public string? GetLocations() => Book?.Locations;
+
+    private bool HasMeaningfulProgressChange(double progress, string? cfi, string? chapter, int currentPage, int totalPages)
    {
-        return Book?.FilePath ?? string.Empty;
+        return Math.Abs(progress - _lastPersistedProgress) >= 0.005 ||
+               string.Equals(cfi ?? string.Empty, _lastPersistedCfi, StringComparison.Ordinal) == false ||
+               string.Equals(chapter ?? string.Empty, _lastPersistedChapter, StringComparison.Ordinal) == false ||
+               currentPage != _lastPersistedCurrentPage ||
+               totalPages != _lastPersistedTotalPages;
    }

-    public string GetBookFormat()
+    private void RememberPersistedProgress(double progress, string? cfi, string? chapter, int currentPage, int totalPages)
    {
-        return Book?.Format ?? "epub";
-    }
-
-    public string? GetLastCfi()
-    {
-        return Book?.LastCfi;
-    }
-
-    public string? GetLocations()
-    {
-        return Book?.Locations;
+        _lastPersistedProgress = progress;
+        _lastPersistedCfi = cfi ?? string.Empty;
+        _lastPersistedChapter = chapter ?? string.Empty;
+        _lastPersistedCurrentPage = currentPage;
+        _lastPersistedTotalPages = totalPages;
+        _lastPersistedAt = DateTime.UtcNow;
    }

    private static string EscapeJs(string value)
    {
        return value.Replace("\\", "\\\\").Replace("'", "\\'").Replace("\n", "\\n").Replace("\r", "\\r");
    }
-}
+}
--- a/BookReader/ViewModels/SettingsViewModel.cs
+++ b/BookReader/ViewModels/SettingsViewModel.cs
@@ -2,11 +2,17 @@
 using BookReader.Services;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
+using Microsoft.Maui.Graphics;

 namespace BookReader.ViewModels;

 public partial class SettingsViewModel : BaseViewModel
 {
+    private static readonly Color SuccessTone = Color.FromArgb("#2F7D5A");
+    private static readonly Color WarningTone = Color.FromArgb("#C47A3E");
+    private static readonly Color DangerTone = Color.FromArgb("#B64932");
+    private static readonly Color NeutralTone = Color.FromArgb("#6E5648");
+
    private readonly ISettingsService _settingsService;
    private readonly ICalibreWebService _calibreWebService;
    private readonly INavigationService _navigationService;
@@ -26,9 +32,24 @@ public partial class SettingsViewModel : BaseViewModel
    [ObservableProperty]
    private string _defaultFontFamily = "serif";

+    [ObservableProperty]
+    private string _defaultReaderTheme = "Тёплая";
+
+    [ObservableProperty]
+    private double _defaultBrightness = Constants.Reader.DefaultBrightness;
+
    [ObservableProperty]
    private string _connectionStatus = string.Empty;

+    [ObservableProperty]
+    private Color _connectionStatusColor = NeutralTone;
+
+    [ObservableProperty]
+    private string _connectionSecurityHint = string.Empty;
+
+    [ObservableProperty]
+    private Color _connectionSecurityColor = NeutralTone;
+
    [ObservableProperty]
    private bool _isConnectionTesting;

@@ -43,6 +64,18 @@ public partial class SettingsViewModel : BaseViewModel
        12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 36, 40
    };

+    public List<string> AvailableReaderThemes { get; } = new()
+    {
+        "Тёплая",
+        "Светлая",
+        "Тёмная"
+    };
+
+    partial void OnCalibreUrlChanged(string value)
+    {
+        UpdateConnectionSecurityHint();
+    }
+
    public SettingsViewModel(
        ISettingsService settingsService,
        ICalibreWebService calibreWebService,
@@ -51,7 +84,7 @@ public partial class SettingsViewModel : BaseViewModel
        _settingsService = settingsService;
        _calibreWebService = calibreWebService;
        _navigationService = navigationService;
-        Title = "Settings";
+        Title = "Настройки";
    }

    [RelayCommand]
@@ -62,49 +95,144 @@ public partial class SettingsViewModel : BaseViewModel
        CalibrePassword = await _settingsService.GetSecurePasswordAsync();
        DefaultFontSize = await _settingsService.GetIntAsync(SettingsKeys.DefaultFontSize, Constants.Reader.DefaultFontSize);
        DefaultFontFamily = await _settingsService.GetAsync(SettingsKeys.DefaultFontFamily, "serif");
+        DefaultReaderTheme = ToDisplayTheme(await _settingsService.GetAsync(SettingsKeys.Theme, Constants.Reader.DefaultTheme));
+        DefaultBrightness = await _settingsService.GetDoubleAsync(SettingsKeys.Brightness, Constants.Reader.DefaultBrightness);
+
+        UpdateConnectionSecurityHint();
    }

    [RelayCommand]
    public async Task SaveSettingsAsync()
    {
-        await _settingsService.SetAsync(SettingsKeys.CalibreUrl, CalibreUrl);
-        await _settingsService.SetAsync(SettingsKeys.CalibreUsername, CalibreUsername);
-        await _settingsService.SetSecurePasswordAsync(CalibrePassword);
-        await _settingsService.SetIntAsync(SettingsKeys.DefaultFontSize, DefaultFontSize);
-        await _settingsService.SetAsync(SettingsKeys.DefaultFontFamily, DefaultFontFamily);
+        await PersistSettingsAsync(showNotification: true);
+    }

-        if (!string.IsNullOrEmpty(CalibreUrl))
-        {
-            _calibreWebService.Configure(CalibreUrl, CalibreUsername, CalibrePassword);
-        }
-
-        await _navigationService.DisplayAlertAsync("Settings", "Settings saved successfully.", "OK");
+    public async Task SaveSilentlyAsync()
+    {
+        await PersistSettingsAsync(showNotification: false);
    }

    [RelayCommand]
    public async Task TestConnectionAsync()
    {
-        if (string.IsNullOrWhiteSpace(CalibreUrl))
+        if (!TryValidateCalibreUrl(out var validationMessage))
        {
-            ConnectionStatus = "Please enter a URL";
+            ConnectionStatus = validationMessage;
+            ConnectionStatusColor = DangerTone;
            return;
        }

        IsConnectionTesting = true;
-        ConnectionStatus = "Testing connection...";
+        ConnectionStatus = "Проверяю соединение...";
+        ConnectionStatusColor = NeutralTone;

        try
        {
            var success = await _calibreWebService.TestConnectionAsync(CalibreUrl, CalibreUsername, CalibrePassword);
-            ConnectionStatus = success ? "✅ Connection successful!" : "❌ Connection failed";
+            ConnectionStatus = success ? "Соединение установлено." : "Сервер ответил ошибкой или недоступен.";
+            ConnectionStatusColor = success ? SuccessTone : DangerTone;
        }
        catch (Exception ex)
        {
-            ConnectionStatus = $"❌ Error: {ex.Message}";
+            ConnectionStatus = $"Ошибка проверки: {ex.Message}";
+            ConnectionStatusColor = DangerTone;
        }
        finally
        {
            IsConnectionTesting = false;
        }
    }
-}
+
+    private async Task PersistSettingsAsync(bool showNotification)
+    {
+        await _settingsService.SetAsync(SettingsKeys.CalibreUrl, CalibreUrl);
+        await _settingsService.SetAsync(SettingsKeys.CalibreUsername, CalibreUsername);
+        await _settingsService.SetSecurePasswordAsync(CalibrePassword);
+        await _settingsService.SetIntAsync(SettingsKeys.DefaultFontSize, DefaultFontSize);
+        await _settingsService.SetAsync(SettingsKeys.DefaultFontFamily, DefaultFontFamily);
+        await _settingsService.SetAsync(SettingsKeys.Theme, ToStoredTheme(DefaultReaderTheme));
+        await _settingsService.SetDoubleAsync(SettingsKeys.Brightness, DefaultBrightness);
+
+        if (!string.IsNullOrWhiteSpace(CalibreUrl))
+        {
+            _calibreWebService.Configure(CalibreUrl, CalibreUsername, CalibrePassword);
+        }
+
+        if (showNotification)
+        {
+            await _navigationService.DisplayAlertAsync("Настройки", "Изменения сохранены.", "OK");
+        }
+    }
+
+    private bool TryValidateCalibreUrl(out string message)
+    {
+        if (string.IsNullOrWhiteSpace(CalibreUrl))
+        {
+            message = "Введите адрес сервера Calibre.";
+            return false;
+        }
+
+        if (!Uri.TryCreate(CalibreUrl, UriKind.Absolute, out var uri))
+        {
+            message = "Адрес сервера должен быть полным URL, например https://server.example.";
+            return false;
+        }
+
+        if (uri.Scheme != Uri.UriSchemeHttp && uri.Scheme != Uri.UriSchemeHttps)
+        {
+            message = "Поддерживаются только адреса с http:// или https://.";
+            return false;
+        }
+
+        message = string.Empty;
+        return true;
+    }
+
+    private void UpdateConnectionSecurityHint()
+    {
+        if (string.IsNullOrWhiteSpace(CalibreUrl))
+        {
+            ConnectionSecurityHint = "Если Calibre доступен из интернета, используйте HTTPS. Для локальной сети HTTP допустим, но менее безопасен.";
+            ConnectionSecurityColor = NeutralTone;
+            return;
+        }
+
+        if (!Uri.TryCreate(CalibreUrl, UriKind.Absolute, out var uri))
+        {
+            ConnectionSecurityHint = "Проверьте адрес сервера. Нужен полный URL с http:// или https://.";
+            ConnectionSecurityColor = DangerTone;
+            return;
+        }
+
+        if (uri.Scheme == Uri.UriSchemeHttps)
+        {
+            ConnectionSecurityHint = "HTTPS включён: логин и пароль передаются по зашифрованному каналу.";
+            ConnectionSecurityColor = SuccessTone;
+            return;
+        }
+
+        if (uri.Scheme == Uri.UriSchemeHttp)
+        {
+            ConnectionSecurityHint = "HTTP подходит для домашней сети, но трафик и пароль не шифруются.";
+            ConnectionSecurityColor = WarningTone;
+            return;
+        }
+
+        ConnectionSecurityHint = "Поддерживаются только схемы http:// и https://.";
+        ConnectionSecurityColor = DangerTone;
+    }
+
+    private static string ToDisplayTheme(string storedTheme) => storedTheme switch
+    {
+        "light" => "Светлая",
+        "dark" => "Тёмная",
+        _ => "Тёплая"
+    };
+
+    private static string ToStoredTheme(string displayTheme) => displayTheme switch
+    {
+        "Светлая" => "light",
+        "Тёмная" => "dark",
+        _ => Constants.Reader.DefaultTheme
+    };
+}
--- a/BookReader/Views/BookshelfPage.xaml
+++ b/BookReader/Views/BookshelfPage.xaml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:vm="clr-namespace:BookReader.ViewModels"
@@ -6,192 +6,223 @@
             xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
             x:Class="BookReader.Views.BookshelfPage"
             x:DataType="vm:BookshelfViewModel"
-             Title="{Binding Title}"
-             Shell.NavBarIsVisible="True">
+             Title="Библиотека"
+             Background="{StaticResource AppBackgroundBrush}">

    <ContentPage.Resources>
        <toolkit:InvertedBoolConverter x:Key="InvertedBoolConverter" />
    </ContentPage.Resources>

-    <Shell.TitleView>
-        <Grid ColumnDefinitions="*,Auto" Padding="0,0,5,0">
-            <Label Grid.Column="0"
-                   Text="📚 Моя книжная полка"
-                   FontSize="20"
-                   FontAttributes="Bold"
-                   VerticalOptions="Center"
-                   TextColor="White" />
-            <ImageButton Grid.Column="1"
-                         Source="dots_vertical.png"
-                         WidthRequest="30"
-                         HeightRequest="30"
-                         VerticalOptions="Center"
-                         Clicked="OnMenuClicked" />
-        </Grid>
-    </Shell.TitleView>
-
-    <Grid RowDefinitions="Auto,*,Auto" BackgroundColor="#3E2723">
-
-        <!-- Search Bar -->
-        <SearchBar Grid.Row="0"
-                   Text="{Binding SearchText, Mode=TwoWay}"
-                   SearchCommand="{Binding SearchCommand}"
-                   SearchCommandParameter="{Binding Text, Source={RelativeSource Self}}"
-                   Placeholder="Search by title or author..."
-                   PlaceholderColor="#A1887F"
-                   TextColor="White"
-                   BackgroundColor="#4E342E"
-                   Margin="10,5" />
-
-        <!-- Bookshelf Background -->
-        <Grid Grid.Row="1">
-            <!-- Empty state -->
-            <VerticalStackLayout IsVisible="{Binding IsEmpty}"
-                                 VerticalOptions="Center"
-                                 HorizontalOptions="Center"
-                                 Spacing="20"
-                                 Padding="40">
-                <Label Text="📖"
-                       FontSize="80"
-                       HorizontalOptions="Center" />
-                <Label Text="Ваша книжная полка пуста"
-                       FontSize="20"
-                       TextColor="#D7CCC8"
-                       HorizontalOptions="Center" />
-                <Label Text="Добавьте книгу из Вашего устроиства или библиотеки Calibre"
-                       FontSize="14"
-                       TextColor="#A1887F"
-                       HorizontalOptions="Center"
-                       HorizontalTextAlignment="Center" />
+    <Grid RowDefinitions="Auto,*">
+        <VerticalStackLayout Grid.Row="0"
+                             Padding="20,24,20,14"
+                             Spacing="16">
+            <VerticalStackLayout Spacing="6">
+                <Label Text="Личная полка"
+                       Style="{StaticResource PageTitleStyle}" />
+                <Label Text="Соберите библиотеку, возвращайтесь к начатому и держите Calibre под рукой."
+                       Style="{StaticResource PageSubtitleStyle}" />
            </VerticalStackLayout>

-            <!-- Book Collection -->
-            <CollectionView ItemsSource="{Binding Books}"
+            <Border Style="{StaticResource CardBorderStyle}">
+                <SearchBar Text="{Binding SearchText, Mode=TwoWay}"
+                           SearchCommand="{Binding SearchCommand}"
+                           SearchCommandParameter="{Binding Text, Source={RelativeSource Self}}"
+                           Placeholder="Название или автор"
+                           Style="{StaticResource AppSearchBarStyle}" />
+            </Border>
+        </VerticalStackLayout>
+
+        <Grid Grid.Row="1">
+            <VerticalStackLayout IsVisible="{Binding IsEmpty}"
+                                 Padding="20,0,20,24"
+                                 VerticalOptions="Center"
+                                 HorizontalOptions="Fill"
+                                 Spacing="16">
+                <Border Style="{StaticResource CardBorderStyle}">
+                    <VerticalStackLayout Spacing="14">
+                        <Label Text="Библиотека пока пуста"
+                               Style="{StaticResource SectionTitleStyle}" />
+                        <Label Text="Добавьте EPUB или FB2 с устройства либо подключитесь к Calibre, чтобы собрать первую полку."
+                               Style="{StaticResource PageSubtitleStyle}" />
+
+                        <Grid ColumnDefinitions="*,*" ColumnSpacing="12">
+                            <Button Grid.Column="0"
+                                    Text="Добавить файл"
+                                    Style="{StaticResource PrimaryButtonStyle}"
+                                    Command="{Binding AddBookFromFileCommand}" />
+                            <Button Grid.Column="1"
+                                    Text="Открыть Calibre"
+                                    Style="{StaticResource SecondaryButtonStyle}"
+                                    Command="{Binding OpenCalibreLibraryCommand}" />
+                        </Grid>
+                    </VerticalStackLayout>
+                </Border>
+            </VerticalStackLayout>
+
+            <CollectionView x:Name="BooksCollectionView"
+                            IsVisible="{Binding IsEmpty, Converter={StaticResource InvertedBoolConverter}}"
+                            ItemsSource="{Binding Books}"
                            SelectionMode="None"
-                            Margin="10">
+                            Margin="0,0,0,24">
+                <CollectionView.Header>
+                    <VerticalStackLayout Padding="20,0,20,18"
+                                         Spacing="16">
+                        <Grid ColumnDefinitions="*,*" ColumnSpacing="12">
+                            <Border Style="{StaticResource CardBorderStyle}">
+                                <VerticalStackLayout Spacing="6">
+                                    <Label Text="Библиотека"
+                                           Style="{StaticResource CaptionStyle}" />
+                                    <Label Text="{Binding LibrarySummary}"
+                                           Style="{StaticResource SectionTitleStyle}" />
+                                    <Label Text="{Binding BooksInProgress, StringFormat='В процессе: {0}'}"
+                                           Style="{StaticResource CaptionStyle}" />
+                                </VerticalStackLayout>
+                            </Border>
+
+                            <Border Style="{StaticResource MutedCardBorderStyle}">
+                                <VerticalStackLayout Spacing="6">
+                                    <Label Text="Прогресс"
+                                           Style="{StaticResource CaptionStyle}" />
+                                    <Label Text="{Binding CompletedBooks, StringFormat='{0} завершено'}"
+                                           Style="{StaticResource SectionTitleStyle}" />
+                                    <Label Text="{Binding BooksInProgress, StringFormat='{0} ещё читаете'}"
+                                           Style="{StaticResource CaptionStyle}" />
+                                </VerticalStackLayout>
+                            </Border>
+                        </Grid>
+
+                        <Border Style="{StaticResource CardBorderStyle}"
+                                IsVisible="{Binding HasContinueReading}">
+                            <Grid ColumnDefinitions="76,*,Auto"
+                                  ColumnSpacing="14">
+                                <Border Grid.Column="0"
+                                        BackgroundColor="{StaticResource SurfaceStrong}"
+                                        StrokeThickness="0"
+                                        StrokeShape="RoundRectangle 16"
+                                        HeightRequest="108"
+                                        WidthRequest="76"
+                                        Padding="0">
+                                    <Image Source="{Binding ContinueReadingBook.CoverImage, Converter={StaticResource ByteArrayToImageConverter}}"
+                                           Aspect="AspectFill" />
+                                </Border>
+
+                                <VerticalStackLayout Grid.Column="1"
+                                                     VerticalOptions="Center"
+                                                     Spacing="4">
+                                    <Label Text="Продолжить чтение"
+                                           Style="{StaticResource CaptionStyle}" />
+                                    <Label Text="{Binding ContinueReadingBook.Title}"
+                                           Style="{StaticResource SectionTitleStyle}"
+                                           MaxLines="2"
+                                           LineBreakMode="TailTruncation" />
+                                    <Label Text="{Binding ContinueReadingBook.Author}"
+                                           Style="{StaticResource CaptionStyle}"
+                                           MaxLines="1"
+                                           LineBreakMode="TailTruncation" />
+                                    <Label Text="{Binding ContinueReadingBook.ProgressText}"
+                                           FontSize="13"
+                                           TextColor="{StaticResource SuccessColor}" />
+                                </VerticalStackLayout>
+
+                                <Button Grid.Column="2"
+                                        Text="Открыть"
+                                        Style="{StaticResource PrimaryButtonStyle}"
+                                        Padding="16,10"
+                                        VerticalOptions="Center"
+                                        Command="{Binding OpenBookCommand}"
+                                        CommandParameter="{Binding ContinueReadingBook}" />
+                            </Grid>
+                        </Border>
+
+                        <Grid ColumnDefinitions="*,*" ColumnSpacing="12">
+                            <Button Grid.Column="0"
+                                    Text="Добавить файл"
+                                    Style="{StaticResource PrimaryButtonStyle}"
+                                    Command="{Binding AddBookFromFileCommand}" />
+                            <Button Grid.Column="1"
+                                    Text="Каталог Calibre"
+                                    Style="{StaticResource SecondaryButtonStyle}"
+                                    Command="{Binding OpenCalibreLibraryCommand}" />
+                        </Grid>
+                    </VerticalStackLayout>
+                </CollectionView.Header>

                <CollectionView.ItemsLayout>
-                    <GridItemsLayout Orientation="Vertical"
-                                     Span="3"
-                                     HorizontalItemSpacing="10"
-                                     VerticalItemSpacing="15" />
+                    <GridItemsLayout x:Name="BooksGridLayout"
+                                     Orientation="Vertical"
+                                     Span="2"
+                                     HorizontalItemSpacing="14"
+                                     VerticalItemSpacing="14" />
                </CollectionView.ItemsLayout>

-                    <CollectionView.ItemTemplate>
-                        <DataTemplate x:DataType="models:Book">
-                            <SwipeView>
-                                <SwipeView.RightItems>
-                                    <SwipeItems>
-                                        <SwipeItem Text="Delete"
-                                                   BackgroundColor="#D32F2F"
-                                                   Command="{Binding Source={RelativeSource AncestorType={x:Type vm:BookshelfViewModel}}, Path=DeleteBookCommand}"
-                                                   CommandParameter="{Binding .}" />
-                                    </SwipeItems>
-                                </SwipeView.RightItems>
+                <CollectionView.ItemTemplate>
+                    <DataTemplate x:DataType="models:Book">
+                        <SwipeView>
+                            <SwipeView.RightItems>
+                                <SwipeItems>
+                                    <SwipeItem Text="Удалить"
+                                               BackgroundColor="{StaticResource DangerColor}"
+                                               Command="{Binding Source={RelativeSource AncestorType={x:Type vm:BookshelfViewModel}}, Path=DeleteBookCommand}"
+                                               CommandParameter="{Binding .}" />
+                                </SwipeItems>
+                            </SwipeView.RightItems>

-                                <Frame Padding="0"
-                                       CornerRadius="8"
-                                       BackgroundColor="#5D4037"
-                                       HasShadow="True"
-                                       BorderColor="Transparent">
-                                    <Frame.GestureRecognizers>
-                                        <TapGestureRecognizer
-                                            Command="{Binding Source={RelativeSource AncestorType={x:Type vm:BookshelfViewModel}}, Path=OpenBookCommand}"
-                                            CommandParameter="{Binding .}" />
-                                    </Frame.GestureRecognizers>
+                            <Border BackgroundColor="{StaticResource SurfaceColor}"
+                                    Stroke="{StaticResource BorderColor}"
+                                    StrokeThickness="1"
+                                    StrokeShape="RoundRectangle 22">
+                                <Border.GestureRecognizers>
+                                    <TapGestureRecognizer Command="{Binding Source={RelativeSource AncestorType={x:Type vm:BookshelfViewModel}}, Path=OpenBookCommand}"
+                                                          CommandParameter="{Binding .}" />
+                                </Border.GestureRecognizers>

-                                    <Grid RowDefinitions="150,Auto,Auto,Auto" Padding="0">
-                                        <!-- Cover Image -->
-                                        <Frame Grid.Row="0"
-                                               Padding="0"
-                                               IsClippedToBounds="True"
-                                               HasShadow="False"
-                                               BorderColor="Transparent">
-                                            <Image Source="{Binding CoverImage, Converter={StaticResource ByteArrayToImageConverter}}"
-                                                   Aspect="AspectFill"
-                                                   HeightRequest="150" />
-                                        </Frame>
+                                <Grid RowDefinitions="168,Auto,Auto,Auto"
+                                      Padding="0">
+                                    <Border Grid.Row="0"
+                                            StrokeThickness="0"
+                                            StrokeShape="RoundRectangle 22,22,0,0"
+                                            BackgroundColor="{StaticResource SurfaceStrong}">
+                                        <Image Source="{Binding CoverImage, Converter={StaticResource ByteArrayToImageConverter}}"
+                                               Aspect="AspectFill"
+                                               HeightRequest="168" />
+                                    </Border>

-                                        <!-- Progress Bar -->
-                                        <Grid Grid.Row="0"
-                                              VerticalOptions="End"
-                                              HeightRequest="4"
-                                              BackgroundColor="#44000000">
-                                            <BoxView BackgroundColor="#4CAF50"
-                                                     HorizontalOptions="Start"
-                                                     WidthRequest="{Binding ReadingProgress, Converter={StaticResource ProgressToWidthConverter}}" />
-                                        </Grid>
+                                    <ProgressBar Grid.Row="0"
+                                                 Progress="{Binding ReadingProgress}"
+                                                 ProgressColor="{StaticResource SuccessColor}"
+                                                 BackgroundColor="#33FFFFFF"
+                                                 VerticalOptions="End"
+                                                 HeightRequest="6" />

-                                        <!-- Title -->
-                                        <Label Grid.Row="1"
-                                               Text="{Binding Title}"
-                                               FontSize="11"
-                                               FontAttributes="Bold"
-                                               TextColor="#EFEBE9"
-                                               LineBreakMode="TailTruncation"
-                                               MaxLines="2"
-                                               Padding="5,5,5,0" />
+                                    <Label Grid.Row="1"
+                                           Margin="12,12,12,0"
+                                           Text="{Binding Title}"
+                                           FontFamily="OpenSansSemibold"
+                                           FontSize="14"
+                                           TextColor="{StaticResource InkColor}"
+                                           MaxLines="2"
+                                           LineBreakMode="TailTruncation" />

-                                        <!-- Author -->
-                                        <Label Grid.Row="2"
-                                               Text="{Binding Author}"
-                                               FontSize="9"
-                                               TextColor="#A1887F"
-                                               LineBreakMode="TailTruncation"
-                                               MaxLines="1"
-                                               Padding="5,0,5,2" />
+                                    <Label Grid.Row="2"
+                                           Margin="12,4,12,0"
+                                           Text="{Binding Author}"
+                                           FontSize="12"
+                                           TextColor="{StaticResource InkSoftColor}"
+                                           MaxLines="1"
+                                           LineBreakMode="TailTruncation" />

-                                        <!-- Progress Text -->
-                                        <Label Grid.Row="3"
-                                               Text="{Binding ProgressText}"
-                                               FontSize="9"
-                                               TextColor="#81C784"
-                                               Padding="5,0,5,5" />
-                                    </Grid>
-                                </Frame>
-                            </SwipeView>
-                        </DataTemplate>
-                    </CollectionView.ItemTemplate>
-                </CollectionView>
-        </Grid>
-
-        <!-- Bottom Shelf / Action Bar -->
-        <Grid Grid.Row="2"
-              BackgroundColor="#4E342E"
-              Padding="15,10"
-              ColumnDefinitions="*,Auto,Auto">
-
-            <!-- Shelf decoration -->
-            <BoxView Grid.ColumnSpan="3"
-                     BackgroundColor="#6D4C41"
-                     HeightRequest="3"
-                     VerticalOptions="Start"
-                     Margin="0,-10,0,0" />
-
-            <Label Grid.Column="0"
-                   Text="{Binding Books.Count, StringFormat='{0} books'}"
-                   TextColor="#A1887F"
-                   FontSize="12"
-                   VerticalOptions="Center" />
-
-            <Button Grid.Column="1"
-                    Text="📁 Add File"
-                    BackgroundColor="#6D4C41"
-                    TextColor="White"
-                    FontSize="12"
-                    CornerRadius="20"
-                    Padding="15,8"
-                    Margin="5,0"
-                    Command="{Binding AddBookFromFileCommand}" />
-
-            <Button Grid.Column="2"
-                    Text="☁️ Calibre"
-                    BackgroundColor="#6D4C41"
-                    TextColor="White"
-                    FontSize="12"
-                    CornerRadius="20"
-                    Padding="15,8"
-                    Command="{Binding OpenCalibreLibraryCommand}" />
+                                    <Label Grid.Row="3"
+                                           Margin="12,6,12,12"
+                                           Text="{Binding ProgressText}"
+                                           FontSize="12"
+                                           TextColor="{StaticResource AccentDarkColor}" />
+                                </Grid>
+                            </Border>
+                        </SwipeView>
+                    </DataTemplate>
+                </CollectionView.ItemTemplate>
+            </CollectionView>
        </Grid>
    </Grid>
 </ContentPage>
--- a/BookReader/Views/BookshelfPage.xaml.cs
+++ b/BookReader/Views/BookshelfPage.xaml.cs
@@ -1,4 +1,4 @@
-using BookReader.Services;
+using BookReader.Services;
 using BookReader.ViewModels;

 namespace BookReader.Views;
@@ -6,20 +6,20 @@ namespace BookReader.Views;
 public partial class BookshelfPage : ContentPage
 {
    private readonly BookshelfViewModel _viewModel;
-    private readonly INavigationService _navigationService;

-    public BookshelfPage(BookshelfViewModel viewModel, INavigationService navigationService, ICachedImageLoadingService imageLoadingService)
+    public BookshelfPage(BookshelfViewModel viewModel)
    {
        InitializeComponent();
        _viewModel = viewModel;
-        _navigationService = navigationService;
        BindingContext = viewModel;
+        SizeChanged += OnPageSizeChanged;
    }

    protected override void OnAppearing()
    {
        base.OnAppearing();
-        // Загружаем книги только если коллекция пуста
+        UpdateGridSpan(Width);
+
        if (_viewModel.Books.Count == 0)
        {
            _ = _viewModel.LoadBooksCommand.ExecuteAsync(null);
@@ -29,31 +29,32 @@ public partial class BookshelfPage : ContentPage
    protected override async void OnNavigatedTo(NavigatedToEventArgs args)
    {
        base.OnNavigatedTo(args);
-        
-        // Если вернулись на главную страницу и книги уже загружены - обновляем прогресс
-        // (например, после чтения)
+
        if (_viewModel.Books.Count > 0 && !_viewModel.IsBusy)
        {
            await _viewModel.LoadBooksCommand.ExecuteAsync(null);
        }
    }

-    private async void OnMenuClicked(object? sender, EventArgs e)
+    private void OnPageSizeChanged(object? sender, EventArgs e)
    {
-        var action = await _navigationService.DisplayActionSheetAsync("Menu", "Cancel",
-            "⚙️ Settings", "☁️ Calibre Library", "ℹ️ About");
-
-        switch (action)
-        {
-            case "⚙️ Settings":
-                await _viewModel.OpenSettingsCommand.ExecuteAsync(null);
-                break;
-            case "☁️ Calibre Library":
-                await _viewModel.OpenCalibreLibraryCommand.ExecuteAsync(null);
-                break;
-            case "ℹ️ About":
-                await _navigationService.DisplayAlertAsync("About", "BookReader v1.0\nEPUB & FB2 Reader", "OK");
-                break;
-        }
+        UpdateGridSpan(Width);
    }
-}
+
+    private void UpdateGridSpan(double availableWidth)
+    {
+        if (availableWidth <= 0)
+        {
+            return;
+        }
+
+        var span = availableWidth switch
+        {
+            < 520 => 2,
+            < 920 => 3,
+            _ => 4
+        };
+
+        BooksGridLayout.Span = span;
+    }
+}
--- a/BookReader/Views/CalibreLibraryPage.xaml
+++ b/BookReader/Views/CalibreLibraryPage.xaml
@@ -1,163 +1,169 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:vm="clr-namespace:BookReader.ViewModels"
             xmlns:models="clr-namespace:BookReader.Models"
-             xmlns:converters="clr-namespace:BookReader.Converters"
             x:Class="BookReader.Views.CalibreLibraryPage"
             x:DataType="vm:CalibreLibraryViewModel"
-             Title="{Binding Title}"
-             BackgroundColor="#1E1E1E">
+             Title="Calibre"
+             Background="{StaticResource AppBackgroundBrush}">

-    <ContentPage.Resources>
-        <converters:ByteArrayToImageSourceConverter x:Key="ByteArrayToImageConverter" />
-    </ContentPage.Resources>
-
-    <Grid RowDefinitions="Auto,Auto,*,Auto">
-
-        <!-- Not Configured Message -->
+    <Grid RowDefinitions="Auto,*">
        <VerticalStackLayout Grid.Row="0"
-                             IsVisible="{Binding IsConfigured, Converter={StaticResource InvertedBoolConverter}}"
-                             Padding="30"
-                             Spacing="15"
-                             VerticalOptions="Center">
-            <Label Text="☁️ Calibre-Web not configured"
-                   FontSize="20"
-                   TextColor="White"
-                   HorizontalOptions="Center" />
-            <Label Text="Please configure your Calibre-Web server in Settings"
-                   FontSize="14"
-                   TextColor="#B0B0B0"
-                   HorizontalOptions="Center"
-                   HorizontalTextAlignment="Center" />
-            <Button Text="Open Settings"
-                    BackgroundColor="#5D4037"
-                    TextColor="White"
-                    CornerRadius="8"
-                    Command="{Binding OpenSettingsCommand}"
-                    HorizontalOptions="Center" />
+                             Padding="20,24,20,14"
+                             Spacing="16">
+            <VerticalStackLayout Spacing="6">
+                <Label Text="Каталог Calibre"
+                       Style="{StaticResource PageTitleStyle}" />
+                <Label Text="Ищите книги на сервере, скачивайте их в одно касание и держите онлайн-каталог рядом с локальной полкой."
+                       Style="{StaticResource PageSubtitleStyle}" />
+            </VerticalStackLayout>
+
+            <Border Style="{StaticResource CardBorderStyle}"
+                    IsVisible="{Binding IsConfigured}">
+                <SearchBar Text="{Binding SearchQuery}"
+                           Placeholder="Поиск по Calibre"
+                           SearchCommand="{Binding SearchCommand}"
+                           Style="{StaticResource AppSearchBarStyle}" />
+            </Border>
        </VerticalStackLayout>

-        <!-- Connection Error Message (Offline Mode) -->
-        <VerticalStackLayout Grid.Row="0"
-                             IsVisible="{Binding IsConfigured}"
-                             Padding="30"
-                             Spacing="15"
-                             VerticalOptions="Center">
-            <Label Text="⚠️ Connection failed"
-                   FontSize="20"
-                   TextColor="#FF7043"
-                   HorizontalOptions="Center"
-                   IsVisible="{Binding ConnectionErrorMessage, Converter={StaticResource IsNotNullOrEmptyConverter}}" />
-            <Label Text="{Binding ConnectionErrorMessage}"
-                   FontSize="14"
-                   TextColor="#B0B0B0"
-                   HorizontalOptions="Center"
-                   HorizontalTextAlignment="Center"
-                   IsVisible="{Binding ConnectionErrorMessage, Converter={StaticResource IsNotNullOrEmptyConverter}}" />
-            <Button Text="🔄 Retry"
-                    BackgroundColor="#5D4037"
-                    TextColor="White"
-                    CornerRadius="8"
-                    Command="{Binding RefreshBooksCommand}"
-                    HorizontalOptions="Center"
-                    IsVisible="{Binding ConnectionErrorMessage, Converter={StaticResource IsNotNullOrEmptyConverter}}" />
-        </VerticalStackLayout>
+        <Grid Grid.Row="1">
+            <VerticalStackLayout IsVisible="{Binding IsConfigured, Converter={StaticResource InvertedBoolConverter}}"
+                                 Padding="20,0,20,24"
+                                 VerticalOptions="Center"
+                                 Spacing="16">
+                <Border Style="{StaticResource CardBorderStyle}">
+                    <VerticalStackLayout Spacing="12">
+                        <Label Text="Calibre ещё не настроен"
+                               Style="{StaticResource SectionTitleStyle}" />
+                        <Label Text="Укажите адрес сервера, логин и пароль в настройках, после чего каталог появится здесь."
+                               Style="{StaticResource PageSubtitleStyle}" />
+                        <Button Text="Открыть настройки"
+                                Style="{StaticResource PrimaryButtonStyle}"
+                                Command="{Binding OpenSettingsCommand}" />
+                    </VerticalStackLayout>
+                </Border>
+            </VerticalStackLayout>

-        <!-- Search Bar -->
-        <SearchBar Grid.Row="1"
-                   IsVisible="{Binding IsConfigured}"
-                   Text="{Binding SearchQuery}"
-                   Placeholder="Search books..."
-                   PlaceholderColor="#666"
-                   TextColor="White"
-                   BackgroundColor="#2C2C2C"
-                   SearchCommand="{Binding SearchCommand}" />
-
-        <!-- Book List -->
-        <RefreshView Grid.Row="2"
-                     IsVisible="{Binding ConnectionErrorMessage, Converter={StaticResource InvertedBoolConverter}}"
-                     Command="{Binding RefreshBooksCommand}"
-                     IsRefreshing="{Binding IsRefreshing}">
-            <CollectionView ItemsSource="{Binding Books}"
-                            SelectionMode="None"
-                            RemainingItemsThreshold="5"
-                            RemainingItemsThresholdReachedCommand="{Binding LoadMoreBooksCommand}">
-
-            <CollectionView.ItemTemplate>
-                <DataTemplate x:DataType="models:CalibreBook">
-                    <Frame Margin="10,5"
-                           Padding="10"
-                           BackgroundColor="#2C2C2C"
-                           CornerRadius="10"
-                           HasShadow="True"
-                           BorderColor="Transparent">
-                        <Grid ColumnDefinitions="80,*,Auto" ColumnSpacing="12">
-                            <!-- Cover -->
-                            <Frame Grid.Column="0"
-                                   Padding="0"
-                                   CornerRadius="6"
-                                   IsClippedToBounds="True"
-                                   HasShadow="False"
-                                   BorderColor="Transparent"
-                                   HeightRequest="110"
-                                   WidthRequest="80">
-                                <Image Source="{Binding CoverImage, Converter={StaticResource ByteArrayToImageConverter}}"
-                                       Aspect="AspectFill" />
-                            </Frame>
-
-                            <!-- Info -->
-                            <VerticalStackLayout Grid.Column="1"
-                                                 VerticalOptions="Center"
-                                                 Spacing="4">
-                                <Label Text="{Binding Title}"
-                                       FontSize="15"
-                                       FontAttributes="Bold"
-                                       TextColor="White"
-                                       MaxLines="2"
-                                       LineBreakMode="TailTruncation" />
-                                <Label Text="{Binding Author}"
-                                       FontSize="12"
-                                       TextColor="#A1887F" />
-                                <Label Text="{Binding Format, StringFormat='Format: {0}'}"
-                                       FontSize="11"
-                                       TextColor="#81C784" />
-                            </VerticalStackLayout>
-
-                            <!-- Download Button -->
-                            <Button Grid.Column="2"
-                                    Text="⬇️"
-                                    FontSize="20"
-                                    BackgroundColor="#4CAF50"
-                                    TextColor="White"
-                                    CornerRadius="25"
-                                    WidthRequest="50"
-                                    HeightRequest="50"
-                                    VerticalOptions="Center"
-                                    Command="{Binding Source={RelativeSource AncestorType={x:Type vm:CalibreLibraryViewModel}}, Path=DownloadBookCommand}"
-                                    CommandParameter="{Binding .}" />
+            <VerticalStackLayout IsVisible="{Binding HasConnectionError}"
+                                 Padding="20,0,20,24"
+                                 VerticalOptions="Center"
+                                 Spacing="16">
+                <Border Style="{StaticResource CardBorderStyle}">
+                    <VerticalStackLayout Spacing="12">
+                        <Label Text="Подключение не удалось"
+                               Style="{StaticResource SectionTitleStyle}" />
+                        <Label Text="{Binding ConnectionErrorMessage}"
+                               Style="{StaticResource PageSubtitleStyle}" />
+                        <Grid ColumnDefinitions="*,*" ColumnSpacing="12">
+                            <Button Grid.Column="0"
+                                    Text="Повторить"
+                                    Style="{StaticResource PrimaryButtonStyle}"
+                                    Command="{Binding RefreshBooksCommand}" />
+                            <Button Grid.Column="1"
+                                    Text="Настройки"
+                                    Style="{StaticResource SecondaryButtonStyle}"
+                                    Command="{Binding OpenSettingsCommand}" />
                        </Grid>
-                    </Frame>
-                </DataTemplate>
-            </CollectionView.ItemTemplate>
-        </CollectionView>
-        </RefreshView>
+                    </VerticalStackLayout>
+                </Border>
+            </VerticalStackLayout>

-        <!-- Status Bar -->
-        <Grid Grid.Row="3"
-              BackgroundColor="#2C2C2C"
-              Padding="15,8"
-              IsVisible="{Binding IsConfigured}">
-            <Label Text="{Binding DownloadStatus}"
-                   TextColor="#81C784"
-                   FontSize="12"
-                   VerticalOptions="Center" />
-            <ActivityIndicator IsRunning="{Binding IsBusy}"
-                               IsVisible="{Binding IsBusy}"
-                               Color="#FF8A65"
-                               HorizontalOptions="End"
-                               HeightRequest="20"
-                               WidthRequest="20" />
+            <RefreshView IsVisible="{Binding IsConfigured}"
+                         IsEnabled="{Binding HasConnectionError, Converter={StaticResource InvertedBoolConverter}}"
+                         Command="{Binding RefreshBooksCommand}"
+                         IsRefreshing="{Binding IsRefreshing}"
+                         Margin="0,0,0,24">
+                <CollectionView ItemsSource="{Binding Books}"
+                                SelectionMode="None"
+                                RemainingItemsThreshold="5"
+                                RemainingItemsThresholdReachedCommand="{Binding LoadMoreBooksCommand}">
+                    <CollectionView.EmptyView>
+                        <VerticalStackLayout Padding="20"
+                                             Spacing="10">
+                            <Border Style="{StaticResource CardBorderStyle}">
+                                <VerticalStackLayout Spacing="8">
+                                    <Label Text="Ничего не найдено"
+                                           Style="{StaticResource SectionTitleStyle}" />
+                                    <Label Text="Измените запрос или обновите каталог, если на сервере появились новые книги."
+                                           Style="{StaticResource PageSubtitleStyle}" />
+                                </VerticalStackLayout>
+                            </Border>
+                        </VerticalStackLayout>
+                    </CollectionView.EmptyView>
+
+                    <CollectionView.Header>
+                        <VerticalStackLayout Padding="20,0,20,16"
+                                             Spacing="12">
+                            <Border Style="{StaticResource MutedCardBorderStyle}"
+                                    IsVisible="{Binding DownloadStatus, Converter={StaticResource IsNotNullOrEmptyConverter}}">
+                                <Grid ColumnDefinitions="*,Auto"
+                                      ColumnSpacing="12">
+                                    <Label Text="{Binding DownloadStatus}"
+                                           Style="{StaticResource PageSubtitleStyle}"
+                                           VerticalOptions="Center" />
+                                    <ActivityIndicator Grid.Column="1"
+                                                       IsRunning="{Binding IsBusy}"
+                                                       IsVisible="{Binding IsBusy}"
+                                                       Color="{StaticResource AccentColor}"
+                                                       HeightRequest="22"
+                                                       WidthRequest="22" />
+                                </Grid>
+                            </Border>
+                        </VerticalStackLayout>
+                    </CollectionView.Header>
+
+                    <CollectionView.ItemTemplate>
+                        <DataTemplate x:DataType="models:CalibreBook">
+                            <Border BackgroundColor="{StaticResource SurfaceColor}"
+                                    Stroke="{StaticResource BorderColor}"
+                                    StrokeThickness="1"
+                                    StrokeShape="RoundRectangle 24"
+                                    Margin="20,0,20,14"
+                                    Padding="14">
+                                <Grid ColumnDefinitions="84,*,Auto"
+                                      ColumnSpacing="14">
+                                    <Border Grid.Column="0"
+                                            BackgroundColor="{StaticResource SurfaceStrong}"
+                                            StrokeThickness="0"
+                                            StrokeShape="RoundRectangle 16"
+                                            HeightRequest="118"
+                                            WidthRequest="84"
+                                            Padding="0">
+                                        <Image Source="{Binding CoverImage, Converter={StaticResource ByteArrayToImageConverter}}"
+                                               Aspect="AspectFill" />
+                                    </Border>
+
+                                    <VerticalStackLayout Grid.Column="1"
+                                                         Spacing="4"
+                                                         VerticalOptions="Center">
+                                        <Label Text="{Binding Title}"
+                                               Style="{StaticResource SectionTitleStyle}"
+                                               MaxLines="2"
+                                               LineBreakMode="TailTruncation" />
+                                        <Label Text="{Binding Author}"
+                                               Style="{StaticResource PageSubtitleStyle}"
+                                               MaxLines="2"
+                                               LineBreakMode="TailTruncation" />
+                                        <Label Text="{Binding Format, StringFormat='Формат: {0}'}"
+                                               FontSize="12"
+                                               TextColor="{StaticResource SuccessColor}" />
+                                    </VerticalStackLayout>
+
+                                    <Button Grid.Column="2"
+                                            Text="Скачать"
+                                            Style="{StaticResource PrimaryButtonStyle}"
+                                            Padding="16,10"
+                                            VerticalOptions="Center"
+                                            Command="{Binding Source={RelativeSource AncestorType={x:Type vm:CalibreLibraryViewModel}}, Path=DownloadBookCommand}"
+                                            CommandParameter="{Binding .}" />
+                                </Grid>
+                            </Border>
+                        </DataTemplate>
+                    </CollectionView.ItemTemplate>
+                </CollectionView>
+            </RefreshView>
        </Grid>
    </Grid>
-</ContentPage>
+</ContentPage>
--- a/BookReader/Views/CalibreLibraryPage.xaml.cs
+++ b/BookReader/Views/CalibreLibraryPage.xaml.cs
@@ -1,5 +1,4 @@
-using BookReader.Services;
-using BookReader.ViewModels;
+using BookReader.ViewModels;

 namespace BookReader.Views;

@@ -7,7 +6,7 @@ public partial class CalibreLibraryPage : ContentPage
 {
    private readonly CalibreLibraryViewModel _viewModel;

-    public CalibreLibraryPage(CalibreLibraryViewModel viewModel, ICachedImageLoadingService imageLoadingService)
+    public CalibreLibraryPage(CalibreLibraryViewModel viewModel)
    {
        InitializeComponent();
        _viewModel = viewModel;
@@ -19,4 +18,4 @@ public partial class CalibreLibraryPage : ContentPage
        base.OnAppearing();
        await _viewModel.InitializeCommand.ExecuteAsync(null);
    }
-}
+}
--- a/BookReader/Views/ReaderPage.xaml
+++ b/BookReader/Views/ReaderPage.xaml
@@ -1,165 +1,194 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:vm="clr-namespace:BookReader.ViewModels"
             xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
-             xmlns:converters="clr-namespace:BookReader.Converters"
             x:Class="BookReader.Views.ReaderPage"
             x:DataType="vm:ReaderViewModel"
             Shell.NavBarIsVisible="False"
-             NavigationPage.HasNavigationBar="False">
+             NavigationPage.HasNavigationBar="False"
+             BackgroundColor="#1B130F">

    <ContentPage.Resources>
        <toolkit:InvertedBoolConverter x:Key="InvertedBoolConverter" />
    </ContentPage.Resources>

    <Grid>
-        <!-- Рендер книги -->
        <HybridWebView x:Name="ReaderWebView"
-                        RawMessageReceived="OnRawMessageReceived"
-                        DefaultFile="index.html"
-                        HorizontalOptions="Fill"
-                        VerticalOptions="Fill" />
+                       RawMessageReceived="OnRawMessageReceived"
+                       DefaultFile="index.html"
+                       HorizontalOptions="Fill"
+                       VerticalOptions="Fill" />

-        <!-- Всплывающее меню -->
        <Grid IsVisible="{Binding IsMenuVisible}"
-              BackgroundColor="Transparent"
+              BackgroundColor="#73000000"
              InputTransparent="False">
            <Grid.GestureRecognizers>
                <TapGestureRecognizer Command="{Binding HideMenuCommand}" />
            </Grid.GestureRecognizers>
-            <!-- Верхняя всплывающая панель -->
-            <Frame  BackgroundColor="#2C2C2C"
-         VerticalOptions="Start"
-        HorizontalOptions="FillAndExpand"
-         Padding="20"
-         BorderColor="Transparent">
-                <VerticalStackLayout>
-                    <Label Text="{Binding ProgressText}"
-             TextColor="White"
-             FontSize="12"
-             HorizontalTextAlignment="Center" />
-                    <!--Back Button-->
-                    <Button Text="← Back to Library"
-             BackgroundColor="#D32F2F"
-             TextColor="White"
-             FontSize="14"
-             CornerRadius="8"
-             HeightRequest="45"
-             Clicked="OnBackToLibrary" />
-                </VerticalStackLayout>
-            </Frame>
-            <!--Нижняя панель-->
-            <Frame VerticalOptions="End"
-                   HorizontalOptions="FillAndExpand"
-                   BackgroundColor="#2C2C2C"
-                   Padding="20"
-                   BorderColor="Transparent">
-                <Frame.GestureRecognizers>
-                    <TapGestureRecognizer Tapped="OnMenuPanelTapped" />
-                </Frame.GestureRecognizers>

-                <VerticalStackLayout Spacing="15">
-                    <!--Title-->
-                    <Label Text="Reading Settings"
-                           FontSize="18"
-                           FontAttributes="Bold"
-                           TextColor="White"
-                           HorizontalOptions="Center" />
+            <Grid RowDefinitions="Auto,*,Auto"
+                  Padding="16,24,16,20">
+                <Border Grid.Row="0"
+                        BackgroundColor="#F7E8D9"
+                        StrokeThickness="0"
+                        StrokeShape="RoundRectangle 24"
+                        Padding="16">
+                    <Grid ColumnDefinitions="Auto,*,Auto"
+                          ColumnSpacing="12">
+                        <Button Grid.Column="0"
+                                Text="Назад"
+                                Style="{StaticResource SecondaryButtonStyle}"
+                                Padding="16,10"
+                                Clicked="OnBackToLibrary" />

-                    <!--Font Size-->
-                    <VerticalStackLayout Spacing="5">
-                        <Label Text="Font Size"
-                               FontSize="14"
-                               TextColor="#B0B0B0" />
-                        <Grid ColumnDefinitions="Auto,*,Auto" ColumnSpacing="10">
-                            <Button Grid.Column="0"
-                                    Text="A-"
-                                    FontSize="14"
-                                    WidthRequest="45"
-                                    HeightRequest="40"
-                                    BackgroundColor="#444"
-                                    TextColor="White"
-                                    CornerRadius="8"
-                                    Clicked="OnDecreaseFontSize" />
-                            <Label Grid.Column="1"
-                                   Text="{Binding FontSize, StringFormat='{0}px'}"
-                                   FontSize="16"
-                                   TextColor="White"
-                                   HorizontalOptions="Center"
-                                   VerticalOptions="Center" />
-                            <Button Grid.Column="2"
-                                    Text="A+"
-                                    FontSize="14"
-                                    WidthRequest="45"
-                                    HeightRequest="40"
-                                    BackgroundColor="#444"
-                                    TextColor="White"
-                                    CornerRadius="8"
-                                    Clicked="OnIncreaseFontSize" />
-                        </Grid>
-                    </VerticalStackLayout>
+                        <VerticalStackLayout Grid.Column="1"
+                                             VerticalOptions="Center"
+                                             Spacing="2">
+                            <Label Text="{Binding Book.Title}"
+                                   FontFamily="OpenSansSemibold"
+                                   FontSize="17"
+                                   TextColor="{StaticResource InkColor}"
+                                   MaxLines="2"
+                                   LineBreakMode="TailTruncation" />
+                            <Label Text="{Binding ProgressText}"
+                                   FontSize="13"
+                                   TextColor="{StaticResource AccentDarkColor}" />
+                            <Label Text="{Binding ChapterProgressText}"
+                                   FontSize="12"
+                                   TextColor="{StaticResource InkSoftColor}"
+                                   MaxLines="1"
+                                   LineBreakMode="TailTruncation" />
+                        </VerticalStackLayout>

-                    <!--Font Family-->
-                    <VerticalStackLayout Spacing="5">
-                        <Label Text="Font Family"
-                               FontSize="14"
-                               TextColor="#B0B0B0" />
-                        <Picker x:Name="FontFamilyPicker"
-                                ItemsSource="{Binding AvailableFonts}"
-                                SelectedItem="{Binding FontFamily}"
-                                TextColor="White"
-                                BackgroundColor="#444"
-                                FontSize="14"
-                                SelectedIndexChanged="OnFontFamilyChanged" />
-                    </VerticalStackLayout>
+                        <Button Grid.Column="2"
+                                Text="Скрыть"
+                                Style="{StaticResource TonalButtonStyle}"
+                                Command="{Binding HideMenuCommand}" />
+                    </Grid>
+                </Border>

-                    <!--Chapters Button-->
-                    <Button Text="📑 Chapters"
-                            BackgroundColor="#5D4037"
-                            TextColor="White"
-                            FontSize="14"
-                            CornerRadius="8"
-                            HeightRequest="45"
-                            Command="{Binding ToggleChapterListCommand}" />
+                <Border Grid.Row="2"
+                        BackgroundColor="#FFF8F0"
+                        StrokeThickness="0"
+                        StrokeShape="RoundRectangle 28"
+                        Padding="18"
+                        VerticalOptions="End">
+                    <Border.GestureRecognizers>
+                        <TapGestureRecognizer Tapped="OnMenuPanelTapped" />
+                    </Border.GestureRecognizers>

-                    <!--Chapter List-->
-                    <CollectionView ItemsSource="{Binding Chapters}"
-                                    IsVisible="{Binding IsChapterListVisible}"
-                                    MaximumHeightRequest="200"
-                                    SelectionMode="Single"
-                                    SelectionChanged="OnChapterSelected">
-                        <CollectionView.ItemTemplate>
-                            <DataTemplate x:DataType="x:String">
-                                <Grid Padding="10,8" BackgroundColor="Transparent">
-                                    <Label Text="{Binding .}"
-                                           TextColor="#E0E0E0"
-                                           FontSize="13"
-                                           LineBreakMode="TailTruncation" />
+                    <ScrollView HeightRequest="360">
+                        <VerticalStackLayout Spacing="16">
+                            <Label Text="Параметры чтения"
+                                   FontFamily="OpenSansSemibold"
+                                   FontSize="20"
+                                   TextColor="{StaticResource InkColor}" />
+
+                            <Grid ColumnDefinitions="*,*,*"
+                                  ColumnSpacing="10">
+                                <Button Grid.Column="0"
+                                        Text="Тёплая"
+                                        Style="{StaticResource TonalButtonStyle}"
+                                        Clicked="OnSepiaThemeClicked" />
+                                <Button Grid.Column="1"
+                                        Text="Светлая"
+                                        Style="{StaticResource TonalButtonStyle}"
+                                        Clicked="OnLightThemeClicked" />
+                                <Button Grid.Column="2"
+                                        Text="Тёмная"
+                                        Style="{StaticResource TonalButtonStyle}"
+                                        Clicked="OnDarkThemeClicked" />
+                            </Grid>
+
+                            <VerticalStackLayout Spacing="8">
+                                <Label Text="Размер шрифта"
+                                       Style="{StaticResource CaptionStyle}" />
+                                <Grid ColumnDefinitions="Auto,*,Auto"
+                                      ColumnSpacing="12">
+                                    <Button Grid.Column="0"
+                                            Text="A-"
+                                            Style="{StaticResource SecondaryButtonStyle}"
+                                            WidthRequest="56"
+                                            Clicked="OnDecreaseFontSize" />
+                                    <Label Grid.Column="1"
+                                           Text="{Binding FontSize, StringFormat='Текущее значение: {0}px'}"
+                                           FontSize="14"
+                                           TextColor="{StaticResource InkColor}"
+                                           HorizontalOptions="Center"
+                                           VerticalOptions="Center" />
+                                    <Button Grid.Column="2"
+                                            Text="A+"
+                                            Style="{StaticResource SecondaryButtonStyle}"
+                                            WidthRequest="56"
+                                            Clicked="OnIncreaseFontSize" />
                                </Grid>
-                            </DataTemplate>
-                        </CollectionView.ItemTemplate>
-                    </CollectionView>
-                </VerticalStackLayout>
-            </Frame>
+                            </VerticalStackLayout>
+
+                            <VerticalStackLayout Spacing="8">
+                                <Label Text="{Binding Brightness, StringFormat='Яркость: {0:F0}%'}"
+                                       Style="{StaticResource CaptionStyle}" />
+                                <Slider Minimum="70"
+                                        Maximum="120"
+                                        Value="{Binding Brightness}"
+                                        ValueChanged="OnBrightnessChanged"
+                                        Style="{StaticResource ReaderSliderStyle}" />
+                            </VerticalStackLayout>
+
+                            <VerticalStackLayout Spacing="8">
+                                <Label Text="Гарнитура"
+                                       Style="{StaticResource CaptionStyle}" />
+                                <Picker x:Name="FontFamilyPicker"
+                                        ItemsSource="{Binding AvailableFonts}"
+                                        SelectedItem="{Binding FontFamily}"
+                                        Style="{StaticResource AppPickerStyle}"
+                                        SelectedIndexChanged="OnFontFamilyChanged" />
+                            </VerticalStackLayout>
+
+                            <Button Text="Оглавление"
+                                    Style="{StaticResource PrimaryButtonStyle}"
+                                    Command="{Binding ToggleChapterListCommand}" />
+
+                            <CollectionView ItemsSource="{Binding Chapters}"
+                                            IsVisible="{Binding IsChapterListVisible}"
+                                            MaximumHeightRequest="190"
+                                            SelectionMode="Single"
+                                            SelectionChanged="OnChapterSelected">
+                                <CollectionView.ItemTemplate>
+                                    <DataTemplate x:DataType="x:String">
+                                        <Border BackgroundColor="{StaticResource SurfaceMuted}"
+                                                Stroke="{StaticResource BorderColor}"
+                                                StrokeThickness="1"
+                                                StrokeShape="RoundRectangle 16"
+                                                Margin="0,0,0,10"
+                                                Padding="12,10">
+                                            <Label Text="{Binding .}"
+                                                   FontSize="13"
+                                                   TextColor="{StaticResource InkColor}"
+                                                   LineBreakMode="TailTruncation" />
+                                        </Border>
+                                    </DataTemplate>
+                                </CollectionView.ItemTemplate>
+                            </CollectionView>
+                        </VerticalStackLayout>
+                    </ScrollView>
+                </Border>
+            </Grid>
        </Grid>

-        <!-- Нижняя постоянная панель отображает прогресс чтения  -->
-        <VerticalStackLayout VerticalOptions="End" 
-             HorizontalOptions="Center" 
-             Padding="10"
-             InputTransparent="True">
-
-            <Frame BackgroundColor="#AA000000" 
-   CornerRadius="15" 
-   Padding="10,2" 
-   BorderColor="Transparent"
-   HasShadow="False">
+        <VerticalStackLayout VerticalOptions="End"
+                             HorizontalOptions="Center"
+                             Padding="12,0,12,16"
+                             InputTransparent="True">
+            <Border BackgroundColor="#B31F1612"
+                    StrokeThickness="0"
+                    StrokeShape="RoundRectangle 18"
+                    Padding="12,6">
                <Label Text="{Binding ProgressText}"
-       TextColor="White"
-       FontSize="12"
-       HorizontalTextAlignment="Center" />
-            </Frame>
+                       TextColor="White"
+                       FontSize="12"
+                       HorizontalTextAlignment="Center" />
+            </Border>
        </VerticalStackLayout>
    </Grid>
-</ContentPage>
+</ContentPage>
--- a/BookReader/Views/ReaderPage.xaml.cs
+++ b/BookReader/Views/ReaderPage.xaml.cs
@@ -1,6 +1,7 @@
-using BookReader.Services;
+using BookReader.Services;
 using BookReader.ViewModels;
 using Newtonsoft.Json.Linq;
+using System.Globalization;

 namespace BookReader.Views;

@@ -8,9 +9,10 @@ public partial class ReaderPage : ContentPage
 {
    private readonly ReaderViewModel _viewModel;
    private readonly INavigationService _navigationService;
-    private bool _isBookLoaded;
    private readonly List<JObject> _chapterData = new();
    private bool _isActive;
+    private bool _isBookLoaded;
+    private bool _isSubscribedToJavaScriptRequests;

    public ReaderPage(ReaderViewModel viewModel, INavigationService navigationService)
    {
@@ -18,19 +20,18 @@ public partial class ReaderPage : ContentPage
        _viewModel = viewModel;
        _navigationService = navigationService;
        BindingContext = viewModel;
-        _viewModel.OnJavaScriptRequested += OnJavaScriptRequested;
    }

    protected override async void OnAppearing()
    {
        base.OnAppearing();
        _isActive = true;
+        EnsureSubscribed();

        try
        {
            await _viewModel.InitializeAsync();
            System.Diagnostics.Debug.WriteLine("[Reader] ViewModel initialized");
-
        }
        catch (Exception ex)
        {
@@ -41,7 +42,7 @@ public partial class ReaderPage : ContentPage
    protected override async void OnDisappearing()
    {
        _isActive = false;
-        _viewModel.OnJavaScriptRequested -= OnJavaScriptRequested;
+        EnsureUnsubscribed();
        base.OnDisappearing();
        await SaveCurrentProgress();
    }
@@ -50,107 +51,84 @@ public partial class ReaderPage : ContentPage
    {
        _isActive = false;
        base.OnNavigatedFrom(args);
-        // Сохраняем немедленно при любом уходе со страницы
        await SaveCurrentProgress();
    }

-    // ========== ЗАГРУЗКА КНИГИ ==========
-
    private async Task LoadBookIntoWebView()
    {
        try
        {
            var book = _viewModel.Book;
-            if (book == null)
-            {
-                return;
-            }
-
-            if (_isBookLoaded)
+            if (book == null || _isBookLoaded)
            {
                return;
            }

            if (!File.Exists(book.FilePath))
            {
-                await _navigationService.DisplayAlertAsync("Error", "Book file not found", "OK");
+                await _navigationService.DisplayAlertAsync("Ошибка", "Файл книги не найден.", "OK");
                return;
            }

-
-            // Читаем файл и конвертируем в Base64
-            var fileBytes = await File.ReadAllBytesAsync(book.FilePath);
-            var base64 = Convert.ToBase64String(fileBytes);
            var format = book.Format.ToLowerInvariant();
-            var lastCfi = _viewModel.GetLastCfi() ?? "";
-            var locations=_viewModel.GetLocations() ?? "";
+            var lastCfi = _viewModel.GetLastCfi() ?? string.Empty;
+            var locations = _viewModel.GetLocations() ?? string.Empty;

-            // Отправляем данные чанками чтобы не превысить лимит JS строки
-            const int chunkSize = 400_000;
+            await EvalJsAsync("window._bkChunks = [];");

-            if (base64.Length > chunkSize)
+            using (var fileStream = File.OpenRead(book.FilePath))
            {
-                var chunks = SplitString(base64, chunkSize);
+                var buffer = new byte[Constants.Reader.Base64RawChunkSize];
+                int bytesRead;

-                await EvalJsAsync("window._bkChunks = [];");
-
-                for (int i = 0; i < chunks.Count; i++)
+                while ((bytesRead = await fileStream.ReadAsync(buffer.AsMemory(0, buffer.Length))) > 0)
                {
-                    await EvalJsAsync($"window._bkChunks.push('{chunks[i]}');");
+                    var base64Chunk = Convert.ToBase64String(buffer, 0, bytesRead);
+                    await EvalJsAsync($"window._bkChunks.push('{base64Chunk}');");
                }
+            }

-                await EvalJsAsync(
-                    $"window.loadBookFromBase64(window._bkChunks.join(''), '{format}', '{EscapeJs(lastCfi)}','{EscapeJs(locations)}');"
-                );
-                await EvalJsAsync("delete window._bkChunks;");
-            }
-            else
-            {
-                await EvalJsAsync(
-                    $"window.loadBookFromBase64('{base64}', '{format}', '{EscapeJs(lastCfi)}','{EscapeJs(locations)}');"
-                );
-            }
+            await EvalJsAsync(
+                $"window.loadBookFromBase64(window._bkChunks.join(''), '{format}', '{EscapeJs(lastCfi)}', '{EscapeJs(locations)}');");
+            await EvalJsAsync("delete window._bkChunks;");

            _isBookLoaded = true;
-            System.Diagnostics.Debug.WriteLine("[Reader] Book load command sent");

-
-
-            // Применяем настройки шрифта сразу
-            await EvalJsAsync($"window.setFontSize({_viewModel.FontSize})");
+            await EvalJsAsync($"window.setFontSize({_viewModel.FontSize.ToString(CultureInfo.InvariantCulture)})");
            await EvalJsAsync($"window.setFontFamily('{EscapeJs(_viewModel.FontFamily)}')");
-
-            System.Diagnostics.Debug.WriteLine("[Reader] Book fully loaded");
+            await EvalJsAsync($"window.setReaderTheme('{EscapeJs(_viewModel.ReaderTheme)}')");
+            await EvalJsAsync($"window.setBrightness({_viewModel.Brightness.ToString(CultureInfo.InvariantCulture)})");
        }
        catch (Exception ex)
        {
            System.Diagnostics.Debug.WriteLine($"[Reader] Load error: {ex.Message}\n{ex.StackTrace}");
-            await _navigationService.DisplayAlertAsync("Error", $"Failed to load book: {ex.Message}", "OK");
+            await _navigationService.DisplayAlertAsync("Ошибка", $"Не удалось загрузить книгу: {ex.Message}", "OK");
        }
    }

-    // ========== СОХРАНЕНИЕ ПРОГРЕССА ==========
-
    private async Task SaveCurrentProgress()
    {
-        if (!_isBookLoaded) return;
+        if (!_isBookLoaded)
+        {
+            return;
+        }

        try
        {
            var result = await EvalJsWithResultAsync("window.getProgress()");
-            if (string.IsNullOrEmpty(result) || result == "null" || result == "{}" || result == "undefined")
+            if (string.IsNullOrEmpty(result) || result is "null" or "{}" or "undefined")
+            {
                return;
+            }

            result = UnescapeJsResult(result);
-
            var data = JObject.Parse(result);
            var progress = data["progress"]?.Value<double>() ?? 0;
            var cfi = data["cfi"]?.ToString();
            var currentPage = data["currentPage"]?.Value<int>() ?? 0;
            var totalPages = data["totalPages"]?.Value<int>() ?? 0;

-            await _viewModel.SaveProgressAsync(progress, cfi, null, currentPage, totalPages);
-            System.Diagnostics.Debug.WriteLine($"[Reader] Saved progress: {progress:P0}");
+            await _viewModel.SaveProgressAsync(progress, cfi, _viewModel.Book?.LastChapter, currentPage, totalPages, force: true);
        }
        catch (Exception ex)
        {
@@ -158,16 +136,16 @@ public partial class ReaderPage : ContentPage
        }
    }

-    // ========== ОБРАБОТКА СООБЩЕНИЙ ОТ JS ==========
-
    private async void OnRawMessageReceived(object? sender, HybridWebViewRawMessageReceivedEventArgs e)
    {
        try
        {
            var message = e.Message;
-            if (string.IsNullOrEmpty(message)) return;
+            if (string.IsNullOrEmpty(message))
+            {
+                return;
+            }

-            // ... (оставляем логику логирования и парсинга JSON) ...
            var json = JObject.Parse(message);
            var action = json["action"]?.ToString();
            var data = json["data"] as JObject;
@@ -175,16 +153,11 @@ public partial class ReaderPage : ContentPage
            switch (action)
            {
                case "readerReady":
-                   
-                    // Вызываем загрузку книги ТОЛЬКО после того, как JS подтвердил готовность
                    _ = MainThread.InvokeOnMainThreadAsync(LoadBookIntoWebView);
                    break;

                case "toggleMenu":
-                    MainThread.BeginInvokeOnMainThread(() =>
-                    {
-                        _viewModel.ToggleMenuCommand.Execute(null);
-                    });
+                    MainThread.BeginInvokeOnMainThread(() => _viewModel.ToggleMenuCommand.Execute(null));
                    break;

                case "progressUpdate":
@@ -195,17 +168,17 @@ public partial class ReaderPage : ContentPage
                        var chapter = data["chapter"]?.ToString();
                        var currentPage = data["currentPage"]?.Value<int>() ?? 0;
                        var totalPages = data["totalPages"]?.Value<int>() ?? 0;
-
-                        // Ловим новые данные по главе
                        var chapterPage = data["chapterCurrentPage"]?.Value<int>() ?? 1;
                        var chapterTotal = data["chapterTotalPages"]?.Value<int>() ?? 1;
-                        // Обновляем ViewModel на главном потоке
-                        MainThread.BeginInvokeOnMainThread(() => {
+
+                        MainThread.BeginInvokeOnMainThread(() =>
+                        {
                            _viewModel.ChapterCurrentPage = chapterPage;
                            _viewModel.ChapterTotalPages = chapterTotal;
                            _viewModel.TotalPages = totalPages;
                            _viewModel.CurrentPage = currentPage;
                        });
+
                        await _viewModel.SaveProgressAsync(progress, cfi, chapter, currentPage, totalPages);
                    }
                    break;
@@ -213,35 +186,35 @@ public partial class ReaderPage : ContentPage
                case "chaptersLoaded":
                    if (data != null)
                    {
-                        var chapters = data["chapters"]?.ToObject<List<JObject>>() ?? new();
+                        var chapters = data["chapters"]?.ToObject<List<JObject>>() ?? new List<JObject>();
                        _chapterData.Clear();
                        _chapterData.AddRange(chapters);
                        MainThread.BeginInvokeOnMainThread(() =>
                        {
                            _viewModel.Chapters = chapters
-                                .Select(c => c["label"]?.ToString() ?? "")
-                                .Where(l => !string.IsNullOrWhiteSpace(l))
+                                .Select(chapter => chapter["label"]?.ToString() ?? string.Empty)
+                                .Where(label => !string.IsNullOrWhiteSpace(label))
                                .ToList();
                        });
                    }
                    break;

                case "bookReady":
-                    if (data != null)
+                    MainThread.BeginInvokeOnMainThread(async () =>
                    {
-                        MainThread.BeginInvokeOnMainThread(async () =>
-                        {
-                            await EvalJsAsync($"window.setFontSize({_viewModel.FontSize})");
-                            await EvalJsAsync($"window.setFontFamily('{EscapeJs(_viewModel.FontFamily)}')");
-                        });
-                    }
+                        await EvalJsAsync($"window.setFontSize({_viewModel.FontSize.ToString(CultureInfo.InvariantCulture)})");
+                        await EvalJsAsync($"window.setFontFamily('{EscapeJs(_viewModel.FontFamily)}')");
+                        await EvalJsAsync($"window.setReaderTheme('{EscapeJs(_viewModel.ReaderTheme)}')");
+                        await EvalJsAsync($"window.setBrightness({_viewModel.Brightness.ToString(CultureInfo.InvariantCulture)})");
+                    });
                    break;

                case "saveLocations":
-                    // Извлекаем строку локаций из данных
-                    string locations = data["locations"]?.ToString();
-                    // Сохраняем в базу данных
-                    await _viewModel.SaveLocationsAsync(locations);
+                    if (data != null)
+                    {
+                        var locations = data["locations"]?.ToString() ?? string.Empty;
+                        await _viewModel.SaveLocationsAsync(locations);
+                    }
                    break;
            }
        }
@@ -251,34 +224,54 @@ public partial class ReaderPage : ContentPage
        }
    }

-    // ========== ОБРАБОТКА ЗАПРОСОВ JS ОТ VIEWMODEL ==========
-
    private async void OnJavaScriptRequested(string script)
    {
-        if (!_isActive) return;
+        if (!_isActive)
+        {
+            return;
+        }
+
        await EvalJsAsync(script);
    }

-    // ========== UI EVENTS ==========
-
    private void OnDecreaseFontSize(object? sender, EventArgs e)
    {
-        var idx = _viewModel.AvailableFontSizes.IndexOf(_viewModel.FontSize);
-        if (idx > 0)
+        var index = _viewModel.AvailableFontSizes.IndexOf(_viewModel.FontSize);
+        if (index > 0)
        {
-            _viewModel.ChangeFontSizeCommand.Execute(_viewModel.AvailableFontSizes[idx - 1]);
+            _viewModel.ChangeFontSizeCommand.Execute(_viewModel.AvailableFontSizes[index - 1]);
        }
    }

    private void OnIncreaseFontSize(object? sender, EventArgs e)
    {
-        var idx = _viewModel.AvailableFontSizes.IndexOf(_viewModel.FontSize);
-        if (idx < _viewModel.AvailableFontSizes.Count - 1)
+        var index = _viewModel.AvailableFontSizes.IndexOf(_viewModel.FontSize);
+        if (index < _viewModel.AvailableFontSizes.Count - 1)
        {
-            _viewModel.ChangeFontSizeCommand.Execute(_viewModel.AvailableFontSizes[idx + 1]);
+            _viewModel.ChangeFontSizeCommand.Execute(_viewModel.AvailableFontSizes[index + 1]);
        }
    }

+    private void OnSepiaThemeClicked(object? sender, EventArgs e)
+    {
+        _viewModel.ChangeReaderThemeCommand.Execute("sepia");
+    }
+
+    private void OnLightThemeClicked(object? sender, EventArgs e)
+    {
+        _viewModel.ChangeReaderThemeCommand.Execute("light");
+    }
+
+    private void OnDarkThemeClicked(object? sender, EventArgs e)
+    {
+        _viewModel.ChangeReaderThemeCommand.Execute("dark");
+    }
+
+    private void OnBrightnessChanged(object? sender, ValueChangedEventArgs e)
+    {
+        _viewModel.ChangeBrightnessCommand.Execute(e.NewValue);
+    }
+
    private void OnFontFamilyChanged(object? sender, EventArgs e)
    {
        if (FontFamilyPicker.SelectedItem is string family)
@@ -291,15 +284,14 @@ public partial class ReaderPage : ContentPage
    {
        if (e.CurrentSelection.FirstOrDefault() is string chapterLabel)
        {
-            var chapterObj = _chapterData.FirstOrDefault(c => c["label"]?.ToString() == chapterLabel);
-            var href = chapterObj?["href"]?.ToString() ?? chapterLabel;
+            var chapterObject = _chapterData.FirstOrDefault(chapter => chapter["label"]?.ToString() == chapterLabel);
+            var href = chapterObject?["href"]?.ToString() ?? chapterLabel;
            _viewModel.GoToChapterCommand.Execute(href);
        }
    }

    private void OnMenuPanelTapped(object? sender, TappedEventArgs e)
    {
-        // Предотвращаем всплытие тапа на оверлей
    }

    private async void OnBackToLibrary(object? sender, EventArgs e)
@@ -308,11 +300,28 @@ public partial class ReaderPage : ContentPage
        await _navigationService.GoBackAsync();
    }

-    // ========== ВСПОМОГАТЕЛЬНЫЕ МЕТОДЫ ==========
+    private void EnsureSubscribed()
+    {
+        if (_isSubscribedToJavaScriptRequests)
+        {
+            return;
+        }
+
+        _viewModel.OnJavaScriptRequested += OnJavaScriptRequested;
+        _isSubscribedToJavaScriptRequests = true;
+    }
+
+    private void EnsureUnsubscribed()
+    {
+        if (!_isSubscribedToJavaScriptRequests)
+        {
+            return;
+        }
+
+        _viewModel.OnJavaScriptRequested -= OnJavaScriptRequested;
+        _isSubscribedToJavaScriptRequests = false;
+    }

-    /// <summary>
-    /// Выполняет JavaScript без ожидания результата
-    /// </summary>
    private async Task EvalJsAsync(string script)
    {
        try
@@ -335,9 +344,6 @@ public partial class ReaderPage : ContentPage
        }
    }

-    /// <summary>
-    /// Выполняет JavaScript и возвращает результат
-    /// </summary>
    private async Task<string?> EvalJsWithResultAsync(string script)
    {
        string? result = null;
@@ -359,29 +365,16 @@ public partial class ReaderPage : ContentPage
        {
            System.Diagnostics.Debug.WriteLine($"[Reader] JS result dispatch error: {ex.Message}");
        }
+
        return result;
    }

-    /// <summary>
-    /// Разбивает строку на чанки заданного размера
-    /// </summary>
-    private static List<string> SplitString(string str, int chunkSize)
-    {
-        var chunks = new List<string>();
-        for (int i = 0; i < str.Length; i += chunkSize)
-        {
-            chunks.Add(str.Substring(i, Math.Min(chunkSize, str.Length - i)));
-        }
-        return chunks;
-    }
-
-    /// <summary>
-    /// Экранирует строку для вставки в JS код (внутри одинарных кавычек)
-    /// </summary>
    private static string EscapeJs(string value)
    {
        if (string.IsNullOrEmpty(value))
+        {
            return string.Empty;
+        }

        return value
            .Replace("\\", "\\\\")
@@ -392,30 +385,25 @@ public partial class ReaderPage : ContentPage
            .Replace("\t", "\\t");
    }

-    /// <summary>
-    /// Убирает экранирование из результата EvaluateJavaScriptAsync.
-    /// Android WebView оборачивает результат в кавычки и экранирует.
-    /// </summary>
    private static string UnescapeJsResult(string result)
    {
        if (string.IsNullOrEmpty(result))
+        {
            return result;
+        }

-        // Убираем обрамляющие кавычки если есть
        if (result.StartsWith("\"") && result.EndsWith("\""))
        {
            result = result.Substring(1, result.Length - 2);
        }

-        // Убираем экранирование
-        result = result
+        return result
            .Replace("\\\"", "\"")
            .Replace("\\\\", "\\")
            .Replace("\\/", "/")
            .Replace("\\n", "\n")
            .Replace("\\r", "\r")
            .Replace("\\t", "\t");
-
-        return result;
    }
-}
+}
+
--- a/BookReader/Views/SettingsPage.xaml
+++ b/BookReader/Views/SettingsPage.xaml
@@ -1,120 +1,130 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:vm="clr-namespace:BookReader.ViewModels"
             x:Class="BookReader.Views.SettingsPage"
             x:DataType="vm:SettingsViewModel"
-             Title="{Binding Title}"
-             BackgroundColor="#1E1E1E">
-
-    <ScrollView>
-        <VerticalStackLayout Spacing="20" Padding="20">
-
-            <!-- Calibre-Web Settings -->
-            <Frame BackgroundColor="#2C2C2C"
-                   CornerRadius="12"
-                   Padding="15"
-                   HasShadow="True"
-                   BorderColor="Transparent">
-                <VerticalStackLayout Spacing="12">
-                    <Label Text="☁️ Calibre-Web Connection"
-                           FontSize="18"
-                           FontAttributes="Bold"
-                           TextColor="White" />
-
-                    <VerticalStackLayout Spacing="5">
-                        <Label Text="Server URL"
-                               FontSize="12"
-                               TextColor="#B0B0B0" />
-                        <Entry Text="{Binding CalibreUrl}"
-                               Placeholder="https://your-calibre-server.com"
-                               PlaceholderColor="#666"
-                               TextColor="White"
-                               BackgroundColor="#3C3C3C"
-                               Keyboard="Url" />
-                    </VerticalStackLayout>
-
-                    <VerticalStackLayout Spacing="5">
-                        <Label Text="Username"
-                               FontSize="12"
-                               TextColor="#B0B0B0" />
-                        <Entry Text="{Binding CalibreUsername}"
-                               Placeholder="Username"
-                               PlaceholderColor="#666"
-                               TextColor="White"
-                               BackgroundColor="#3C3C3C" />
-                    </VerticalStackLayout>
-
-                    <VerticalStackLayout Spacing="5">
-                        <Label Text="Password"
-                               FontSize="12"
-                               TextColor="#B0B0B0" />
-                        <Entry Text="{Binding CalibrePassword}"
-                               Placeholder="Password"
-                               PlaceholderColor="#666"
-                               TextColor="White"
-                               BackgroundColor="#3C3C3C"
-                               IsPassword="True" />
-                    </VerticalStackLayout>
-
-                    <Button Text="Test Connection"
-                            BackgroundColor="#5D4037"
-                            TextColor="White"
-                            CornerRadius="8"
-                            Command="{Binding TestConnectionCommand}"
-                            IsEnabled="{Binding IsConnectionTesting, Converter={StaticResource InvertedBoolConverter}}" />
-
-                    <Label Text="{Binding ConnectionStatus}"
-                           FontSize="13"
-                           TextColor="#81C784"
-                           IsVisible="{Binding ConnectionStatus, Converter={StaticResource IsNotNullOrEmptyConverter}}" />
-                </VerticalStackLayout>
-            </Frame>
-
-            <!-- Reading Settings -->
-            <Frame BackgroundColor="#2C2C2C"
-                   CornerRadius="12"
-                   Padding="15"
-                   HasShadow="True"
-                   BorderColor="Transparent">
-                <VerticalStackLayout Spacing="12">
-                    <Label Text="📖 Reading Defaults"
-                           FontSize="18"
-                           FontAttributes="Bold"
-                           TextColor="White" />
-
-                    <VerticalStackLayout Spacing="5">
-                        <Label Text="Default Font Size"
-                               FontSize="12"
-                               TextColor="#B0B0B0" />
-                        <Picker ItemsSource="{Binding AvailableFontSizes}"
-                                SelectedItem="{Binding DefaultFontSize}"
-                                TextColor="White"
-                                BackgroundColor="#3C3C3C" />
-                    </VerticalStackLayout>
-
-                    <VerticalStackLayout Spacing="5">
-                        <Label Text="Default Font Family"
-                               FontSize="12"
-                               TextColor="#B0B0B0" />
-                        <Picker ItemsSource="{Binding AvailableFonts}"
-                                SelectedItem="{Binding DefaultFontFamily}"
-                                TextColor="White"
-                                BackgroundColor="#3C3C3C" />
-                    </VerticalStackLayout>
-                </VerticalStackLayout>
-            </Frame>
-
-            <!-- Save Button -->
-            <Button Text="💾 Save Settings"
-                    BackgroundColor="#4CAF50"
-                    TextColor="White"
-                    FontSize="16"
-                    FontAttributes="Bold"
-                    CornerRadius="12"
-                    HeightRequest="50"
-                    Command="{Binding SaveSettingsCommand}" />
+             Title="Настройки"
+             Background="{StaticResource AppBackgroundBrush}">

+    <Grid RowDefinitions="Auto,*">
+        <VerticalStackLayout Grid.Row="0"
+                             Padding="20,24,20,14"
+                             Spacing="6">
+            <Label Text="Настройки"
+                   Style="{StaticResource PageTitleStyle}" />
+            <Label Text="Подключите Calibre и задайте параметры чтения, которые будут применяться ко всем новым книгам."
+                   Style="{StaticResource PageSubtitleStyle}" />
        </VerticalStackLayout>
-    </ScrollView>
-</ContentPage>
+
+        <ScrollView Grid.Row="1"
+                    Margin="0,0,0,24">
+            <VerticalStackLayout Padding="20,0,20,0"
+                                 Spacing="16">
+                <Border Style="{StaticResource CardBorderStyle}">
+                    <VerticalStackLayout Spacing="14">
+                        <Label Text="Подключение к Calibre"
+                               Style="{StaticResource SectionTitleStyle}" />
+
+                        <VerticalStackLayout Spacing="6">
+                            <Label Text="Адрес сервера"
+                                   Style="{StaticResource CaptionStyle}" />
+                            <Entry Text="{Binding CalibreUrl}"
+                                   Placeholder="https://your-calibre-server.example"
+                                   Style="{StaticResource AppEntryStyle}"
+                                   Keyboard="Url" />
+                        </VerticalStackLayout>
+
+                        <VerticalStackLayout Spacing="6">
+                            <Label Text="Логин"
+                                   Style="{StaticResource CaptionStyle}" />
+                            <Entry Text="{Binding CalibreUsername}"
+                                   Placeholder="Имя пользователя"
+                                   Style="{StaticResource AppEntryStyle}" />
+                        </VerticalStackLayout>
+
+                        <VerticalStackLayout Spacing="6">
+                            <Label Text="Пароль"
+                                   Style="{StaticResource CaptionStyle}" />
+                            <Entry Text="{Binding CalibrePassword}"
+                                   Placeholder="Пароль"
+                                   Style="{StaticResource AppEntryStyle}"
+                                   IsPassword="True" />
+                        </VerticalStackLayout>
+
+                        <Border Style="{StaticResource MutedCardBorderStyle}">
+                            <Label Text="{Binding ConnectionSecurityHint}"
+                                   TextColor="{Binding ConnectionSecurityColor}"
+                                   FontSize="13"
+                                   LineBreakMode="WordWrap" />
+                        </Border>
+
+                        <Grid ColumnDefinitions="*,*" ColumnSpacing="12">
+                            <Button Grid.Column="0"
+                                    Text="Проверить"
+                                    Style="{StaticResource SecondaryButtonStyle}"
+                                    Command="{Binding TestConnectionCommand}"
+                                    IsEnabled="{Binding IsConnectionTesting, Converter={StaticResource InvertedBoolConverter}}" />
+                            <Button Grid.Column="1"
+                                    Text="Сохранить"
+                                    Style="{StaticResource PrimaryButtonStyle}"
+                                    Command="{Binding SaveSettingsCommand}" />
+                        </Grid>
+
+                        <Grid ColumnDefinitions="*,Auto"
+                              IsVisible="{Binding ConnectionStatus, Converter={StaticResource IsNotNullOrEmptyConverter}}">
+                            <Label Text="{Binding ConnectionStatus}"
+                                   TextColor="{Binding ConnectionStatusColor}"
+                                   FontSize="13"
+                                   VerticalOptions="Center" />
+                            <ActivityIndicator Grid.Column="1"
+                                               IsRunning="{Binding IsConnectionTesting}"
+                                               IsVisible="{Binding IsConnectionTesting}"
+                                               Color="{StaticResource AccentColor}" />
+                        </Grid>
+                    </VerticalStackLayout>
+                </Border>
+
+                <Border Style="{StaticResource CardBorderStyle}">
+                    <VerticalStackLayout Spacing="14">
+                        <Label Text="Чтение по умолчанию"
+                               Style="{StaticResource SectionTitleStyle}" />
+
+                        <VerticalStackLayout Spacing="6">
+                            <Label Text="Размер шрифта"
+                                   Style="{StaticResource CaptionStyle}" />
+                            <Picker ItemsSource="{Binding AvailableFontSizes}"
+                                    SelectedItem="{Binding DefaultFontSize}"
+                                    Style="{StaticResource AppPickerStyle}" />
+                        </VerticalStackLayout>
+
+                        <VerticalStackLayout Spacing="6">
+                            <Label Text="Гарнитура"
+                                   Style="{StaticResource CaptionStyle}" />
+                            <Picker ItemsSource="{Binding AvailableFonts}"
+                                    SelectedItem="{Binding DefaultFontFamily}"
+                                    Style="{StaticResource AppPickerStyle}" />
+                        </VerticalStackLayout>
+
+                        <VerticalStackLayout Spacing="6">
+                            <Label Text="Тема ридера"
+                                   Style="{StaticResource CaptionStyle}" />
+                            <Picker ItemsSource="{Binding AvailableReaderThemes}"
+                                    SelectedItem="{Binding DefaultReaderTheme}"
+                                    Style="{StaticResource AppPickerStyle}" />
+                        </VerticalStackLayout>
+
+                        <VerticalStackLayout Spacing="8">
+                            <Label Text="{Binding DefaultBrightness, StringFormat='Яркость страницы: {0:F0}%'}"
+                                   Style="{StaticResource CaptionStyle}" />
+                            <Slider Minimum="70"
+                                    Maximum="120"
+                                    Value="{Binding DefaultBrightness}"
+                                    Style="{StaticResource ReaderSliderStyle}" />
+                        </VerticalStackLayout>
+                    </VerticalStackLayout>
+                </Border>
+            </VerticalStackLayout>
+        </ScrollView>
+    </Grid>
+</ContentPage>
--- a/BookReader/Views/SettingsPage.xaml.cs
+++ b/BookReader/Views/SettingsPage.xaml.cs
@@ -1,4 +1,4 @@
-using BookReader.ViewModels;
+using BookReader.ViewModels;

 namespace BookReader.Views;

@@ -31,14 +31,13 @@ public partial class SettingsPage : ContentPage
    {
        base.OnDisappearing();

-        // Автосохранение при выходе со страницы настроек
        try
        {
-            await _viewModel.SaveSettingsCommand.ExecuteAsync(null);
+            await _viewModel.SaveSilentlyAsync();
        }
        catch (Exception ex)
        {
            System.Diagnostics.Debug.WriteLine($"Error auto-saving settings: {ex.Message}");
        }
    }
-}
+}