diff --git a/frontend/src/App.css b/frontend/src/App.css
index 6d4d700..c9391ba 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -1,5 +1,44 @@
 /* Custom styles for S3 Lists Manager */
-/* Most styles are now provided by @tabler/core */
+/* Layout: Tabler Fluid Vertical (https://preview.tabler.io/layout-fluid-vertical.html) */
+
+/* --- Fluid Vertical: page structure --- */
+.page {
+  min-height: 100vh;
+}
+
+/* Sidebar: nav-link with icon (Tabler vertical) */
+.navbar-vertical .nav-link {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+.navbar-vertical .nav-link-icon {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 1.25rem;
+  height: 1.25rem;
+  flex-shrink: 0;
+}
+.navbar-vertical .nav-link-icon .icon {
+  width: 1.25rem;
+  height: 1.25rem;
+}
+/* Sidebar dropdown: inline submenu (no popup) */
+.navbar-vertical .nav-item.dropdown .dropdown-menu {
+  position: static;
+  float: none;
+  border: none;
+  box-shadow: none;
+  background: transparent;
+  padding: 0 0 0.5rem 0;
+  margin: 0;
+}
+.navbar-vertical .nav-item.dropdown .dropdown-item {
+  padding-left: calc(0.5rem + 1.25rem + 0.5rem);
+  padding-top: 0.35rem;
+  padding-bottom: 0.35rem;
+}
 
 /* Custom avatar background */
 .avatar {
diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index 24c2e0a..e35af57 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -233,113 +233,117 @@ function MainLayout() {
 
   const activeTab = getActiveTab();
 
+  // Fluid Vertical: вертикальный сайдбар + верхний навбар + page-wrapper
   return (
-    <div className="page d-flex flex-column min-vh-100">
+    <div className="page">
       {/* Skip link для доступности */}
       <a href="#main-content" className="skip-link">
         Перейти к основному содержанию
       </a>
-      
-      {/* Верхнее меню Tabler Admin */}
-      <header className="navbar navbar-expand-md navbar-light d-print-none" style={{boxShadow: '0 1px 0 0 #e9ecef'}}>
-        <div className="container-xl">
-          {/* Логотип */}
-          <div className="navbar-brand navbar-brand-autodark d-none-navbar-horizontal pe-0 pe-md-3">
-            <Link to="/" className="navbar-brand d-flex align-items-center">
-              <IconBrandTabler className="navbar-brand-icon me-2" />
-              <span className="fw-bold">S3 Lists Manager</span>
-            </Link>
-          </div>
 
-          {/* Кнопка бургера для мобильных */}
+      {/* Левая вертикальная навигация (Tabler navbar-vertical) */}
+      <header className="navbar navbar-vertical navbar-expand-md d-print-none">
+        <div className="container-fluid">
+          <Link to="/" className="navbar-brand navbar-brand-autodark">
+            <IconBrandTabler className="navbar-brand-icon" />
+            <span className="fw-bold">S3 Lists Manager</span>
+          </Link>
+          <div className="navbar-nav flex-row d-md-none">
+            <button
+              className="navbar-toggler"
+              type="button"
+              data-bs-toggle="collapse"
+              data-bs-target="#sidebar-menu"
+              aria-controls="sidebar-menu"
+              aria-expanded="false"
+              aria-label="Открыть меню"
+            >
+              <IconMenu2 />
+            </button>
+          </div>
+          <div className="collapse navbar-collapse" id="sidebar-menu">
+            <ul className="navbar-nav pt-lg-3">
+              {navCategories.map(category => (
+                <li key={category.id} className={`nav-item${category.items ? ' dropdown' : ''}${(category.single && activeTab === category.id) || (category.items && category.items.some(i => activeTab === i.id)) ? ' active' : ''}`}>
+                  {category.single ? (
+                    <Link
+                      to={category.path}
+                      className="nav-link"
+                    >
+                      <span className="nav-link-icon">
+                        <category.icon className="icon" />
+                      </span>
+                      <span className="nav-link-title">{category.title}</span>
+                    </Link>
+                  ) : (
+                    <>
+                      <a
+                        className="nav-link dropdown-toggle"
+                        href="#"
+                        onClick={(e) => {
+                          e.preventDefault();
+                          toggleDropdown(category.id);
+                        }}
+                        aria-expanded={dropdownStates[category.id]}
+                      >
+                        <span className="nav-link-icon">
+                          <category.icon className="icon" />
+                        </span>
+                        <span className="nav-link-title">{category.title}</span>
+                      </a>
+                      <div className={`dropdown-menu${dropdownStates[category.id] ? ' show' : ''}`}>
+                        {category.items.map(item => (
+                          <Link
+                            key={item.id}
+                            to={item.path}
+                            className={`dropdown-item${activeTab === item.id ? ' active' : ''}`}
+                          >
+                            {item.title}
+                          </Link>
+                        ))}
+                      </div>
+                    </>
+                  )}
+                </li>
+              ))}
+            </ul>
+          </div>
+        </div>
+      </header>
+
+      {/* Верхний навбар (как в Tabler fluid vertical) */}
+      <header className="navbar navbar-expand-md d-print-none">
+        <div className="container-fluid">
           <button
             className="navbar-toggler d-md-none"
             type="button"
             data-bs-toggle="collapse"
-            data-bs-target="#navbar-menu"
-            aria-controls="navbar-menu"
-            aria-expanded="false"
-            aria-label="Toggle navigation"
+            data-bs-target="#sidebar-menu"
+            aria-controls="sidebar-menu"
+            aria-label="Меню"
           >
             <IconMenu2 />
           </button>
-          
-          {/* Основное меню */}
-          <div className="collapse navbar-collapse" id="navbar-menu">
-            <div className="d-flex flex-column flex-md-row flex-fill align-items-stretch align-items-md-center">
-              <ul className="navbar-nav">
-                {navCategories.map(category => (
-                  <li key={category.id} className="nav-item dropdown">
-                    {category.single ? (
-                      <Link
-                        to={category.path}
-                        className={`nav-link${activeTab === category.id ? ' active' : ''}`}
-                      >
-                        <category.icon className="icon icon-tabler" />
-                        <span className="nav-link-title">{category.title}</span>
-                      </Link>
-                    ) : (
-                      <>
-                        <a 
-                          className={`nav-link dropdown-toggle${activeTab.startsWith(category.id) ? ' active' : ''}`}
-                          href="#"
-                          onClick={(e) => {
-                            e.preventDefault();
-                            e.stopPropagation();
-                            toggleDropdown(category.id);
-                          }}
-                        >
-                          <category.icon className="icon icon-tabler" />
-                          <span className="nav-link-title">{category.title}</span>
-                        </a>
-                        {dropdownStates[category.id] && (
-                          <div className="dropdown-menu show" onClick={(e) => e.stopPropagation()}>
-                            <div className="dropdown-menu-columns">
-                              <div className="dropdown-menu-column">
-                                {category.items.map(item => (
-                                  <Link
-                                    key={item.id}
-                                    to={item.path}
-                                    className={`dropdown-item${activeTab === item.id ? ' active' : ''}`}
-                                  >
-                                    <item.icon className="icon icon-tabler" />
-                                    {item.title}
-                                  </Link>
-                                ))}
-                              </div>
-                            </div>
-                          </div>
-                        )}
-                      </>
-                    )}
-                  </li>
-                ))}
-              </ul>
-            </div>
-          </div>
-          
-          {/* Правая часть навбара: язык, тема и действия */}
-          <div className="navbar-nav flex-row order-md-last">
-            {/* Язык */}
-            <div className="nav-item dropdown me-1">
-              <a 
-                href="#" 
-                className="nav-link px-2 dropdown-toggle" 
+          <div className="navbar-nav flex-row order-md-last flex-grow-1 justify-content-end">
+            <div className="nav-item dropdown">
+              <a
+                href="#"
+                className="nav-link px-2 dropdown-toggle"
                 data-bs-toggle="dropdown"
                 onClick={(e) => e.preventDefault()}
               >
                 <span className="badge">{lang.toUpperCase()}</span>
               </a>
               <div className="dropdown-menu dropdown-menu-end">
-                <a 
-                  href="#" 
+                <a
+                  href="#"
                   className={`dropdown-item ${lang === 'ru' ? 'active' : ''}`}
                   onClick={(e) => { e.preventDefault(); setLang('ru'); }}
                 >
                   Русский
                 </a>
-                <a 
-                  href="#" 
+                <a
+                  href="#"
                   className={`dropdown-item ${lang === 'en' ? 'active' : ''}`}
                   onClick={(e) => { e.preventDefault(); setLang('en'); }}
                 >
@@ -347,27 +351,25 @@ function MainLayout() {
                 </a>
               </div>
             </div>
-
-            {/* Тема */}
-            <div className="nav-item dropdown me-1">
-              <a 
-                href="#" 
-                className="nav-link px-2 dropdown-toggle" 
+            <div className="nav-item dropdown">
+              <a
+                href="#"
+                className="nav-link px-2 dropdown-toggle"
                 data-bs-toggle="dropdown"
                 onClick={(e) => e.preventDefault()}
               >
                 {theme === 'dark' ? '🌙' : '☀️'}
               </a>
               <div className="dropdown-menu dropdown-menu-end">
-                <a 
-                  href="#" 
+                <a
+                  href="#"
                   className={`dropdown-item ${theme === 'light' ? 'active' : ''}`}
                   onClick={(e) => { e.preventDefault(); setTheme('light'); }}
                 >
                   ☀️ {t('light')}
                 </a>
-                <a 
-                  href="#" 
+                <a
+                  href="#"
                   className={`dropdown-item ${theme === 'dark' ? 'active' : ''}`}
                   onClick={(e) => { e.preventDefault(); setTheme('dark'); }}
                 >
@@ -375,17 +377,13 @@ function MainLayout() {
                 </a>
               </div>
             </div>
-
-            {/* Горячие клавиши */}
-            <div className="nav-item me-1">
+            <div className="nav-item">
               <KeyboardShortcutsButton className="nav-link px-2" />
             </div>
-
-            {/* Настройки */}
             <div className="nav-item">
-              <a 
-                href="#" 
-                className="nav-link px-2" 
+              <a
+                href="#"
+                className="nav-link px-2"
                 onClick={(e) => { e.preventDefault(); setSettingsOpen(true); }}
                 title="Настройки"
               >
@@ -395,29 +393,38 @@ function MainLayout() {
           </div>
         </div>
       </header>
-      <main id="main-content" className="container-xl mt-4 flex-grow-1" tabIndex="-1">
-        <Routes>
-          <Route path="/dashboard" element={<Dashboard />} />
-          <Route path="/domains" element={<DomainsNewManager />} />
-          <Route path="/ip-ranges" element={<IPRangesManager />} />
-          <Route path="/asns" element={<ASNsNewManager />} />
-          <Route path="/communities" element={<CommunitiesManager />} />
-          <Route path="/auto-urls" element={<AutoUrlManager />} />
-          <Route path="/servers" element={<ServerManager />} />
-          <Route path="/billing" element={<BillingManager />} />
-          <Route path="/filters" element={<FilterManager />} />
-          <Route path="/network-config" element={<NetworkConfigManager />} />
-          <Route path="/easy-switch" element={<EasySwitchManager />} />
-          <Route path="/mikrotik-backups" element={<MikrotikBackupsManager />} />
-          <Route path="/mikrotik-tools" element={<MikrotikTools />} />
-          <Route path="/" element={<Navigate to="/dashboard" replace />} />
-        </Routes>
-      </main>
-      <footer className="footer mt-auto py-2">
-        <div className="container-xl text-muted small">
-          Версия UI: {import.meta?.env?.VITE_APP_VERSION || 'dev'}
+
+      <div className="page-wrapper">
+        <div className="page-body">
+          <div className="container-fluid">
+            <main id="main-content" tabIndex="-1">
+              <Routes>
+                <Route path="/dashboard" element={<Dashboard />} />
+                <Route path="/domains" element={<DomainsNewManager />} />
+                <Route path="/ip-ranges" element={<IPRangesManager />} />
+                <Route path="/asns" element={<ASNsNewManager />} />
+                <Route path="/communities" element={<CommunitiesManager />} />
+                <Route path="/auto-urls" element={<AutoUrlManager />} />
+                <Route path="/servers" element={<ServerManager />} />
+                <Route path="/billing" element={<BillingManager />} />
+                <Route path="/filters" element={<FilterManager />} />
+                <Route path="/network-config" element={<NetworkConfigManager />} />
+                <Route path="/easy-switch" element={<EasySwitchManager />} />
+                <Route path="/mikrotik-backups" element={<MikrotikBackupsManager />} />
+                <Route path="/mikrotik-tools" element={<MikrotikTools />} />
+                <Route path="/" element={<Navigate to="/dashboard" replace />} />
+              </Routes>
+            </main>
+          </div>
         </div>
-      </footer>
+        <footer className="footer footer-transparent d-print-none">
+          <div className="container-fluid">
+            <ul className="list-inline list-inline-dots mb-0 text-muted small">
+              <li className="list-inline-item">Версия UI: {import.meta?.env?.VITE_APP_VERSION || 'dev'}</li>
+            </ul>
+          </div>
+        </footer>
+      </div>
       <SettingsModal open={settingsOpen} onClose={() => setSettingsOpen(false)} />
       <CommandPalette />
     </div>
diff --git a/frontend/src/components/PageHeader.jsx b/frontend/src/components/PageHeader.jsx
index 8d2b756..37ff3b2 100644
--- a/frontend/src/components/PageHeader.jsx
+++ b/frontend/src/components/PageHeader.jsx
@@ -1,26 +1,25 @@
 import React from 'react'
 
+/** Заголовок страницы в стиле Tabler (page-header + page-title + опционально actions справа) */
 function PageHeader({ title, pretitle, actions, meta }) {
   return (
     <div className="page-header d-print-none mb-4">
-      {/* Верхняя строка: только заголовок */}
       <div className="row align-items-center">
         <div className="col">
-          <h2 className="page-title">{title}</h2>
           {pretitle && (
-            <div className="page-pretitle mt-1">{pretitle}</div>
+            <div className="page-pretitle">{pretitle}</div>
           )}
+          <h1 className="page-title">{title}</h1>
           {meta && (
             <div className="text-muted small mt-1">{meta}</div>
           )}
         </div>
+        {actions && (
+          <div className="col-auto ms-auto d-print-none">
+            {actions}
+          </div>
+        )}
       </div>
-      {/* Отдельная строка под заголовком: действия страницы */}
-      {actions && (
-        <div className="mt-4 d-print-none">
-          {actions}
-        </div>
-      )}
     </div>
   )
 }