diff --git a/src/App.tsx b/src/App.tsx
index bf8ffff..8559fa8 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,4 +1,5 @@
 import { createBrowserRouter, RouterProvider, Navigate, Outlet } from "react-router-dom"
+import { useState } from "react"
 import { ThemeProvider } from "./components/ThemeProvider"
 import { LanguageProvider } from "./components/LanguageProvider"
 import { Toaster } from "./components/ui/toaster"
@@ -21,12 +22,17 @@ import Tags from "./pages/Tags"
 import Timesheet from "./pages/Timesheet"
 
 const MainLayout = () => {
+  const [mobileSidebarOpen, setMobileSidebarOpen] = useState(false)
+
   return (
     <div className="flex h-screen bg-slate-50 dark:bg-slate-950 overflow-hidden text-slate-900 dark:text-slate-100">
-      <Sidebar />
+      <Sidebar
+        mobileOpen={mobileSidebarOpen}
+        onMobileClose={() => setMobileSidebarOpen(false)}
+      />
 
       <div className="flex-1 flex flex-col h-screen overflow-y-auto relative">
-        <Navbar />
+        <Navbar onOpenSidebar={() => setMobileSidebarOpen(true)} />
 
         <main className="flex-1 relative">
           <Outlet />
diff --git a/src/components/Navbar.tsx b/src/components/Navbar.tsx
index 46df4f4..1e6b0f5 100644
--- a/src/components/Navbar.tsx
+++ b/src/components/Navbar.tsx
@@ -3,14 +3,18 @@ import { useNavigate } from "react-router-dom"
 import { useTranslation } from "../hooks/useTranslation"
 import { Button } from "./ui/button"
 import { SettingsMenu } from "./SettingsMenu"
-import { LogOut, User, Moon, Sun, Globe, Command } from "lucide-react"
+import { LogOut, User, Moon, Sun, Globe, Command, Menu } from "lucide-react"
 import { logoutUser, getUserProfile } from "../api/users"
 import { WorkspaceSelector } from "./WorkspaceSelector"
 import { toast } from "sonner"
 import { NotificationBell } from "./notifications/NotificationBell"
 import { clearSessionTokens, getAccessToken, getRefreshToken } from "../lib/session"
 
-export function Navbar() {
+type NavbarProps = {
+  onOpenSidebar?: () => void
+}
+
+export function Navbar({ onOpenSidebar }: NavbarProps) {
   const { t, lang, setLanguage } = useTranslation()
   const navigate = useNavigate()
   const [showLogoutModal, setShowLogoutModal] = useState(false)
@@ -106,12 +110,22 @@ export function Navbar() {
   return (
     <>
       <header className="sticky top-0 z-50 flex items-center justify-between border-b border-slate-200/80 bg-white/70 px-8 py-6 backdrop-blur-md transition-colors dark:border-slate-800/80 dark:bg-slate-900/70">
-        <div className="flex cursor-pointer items-center gap-2" onClick={() => navigate("/")}>
+        <div className="flex items-center gap-3">
+          <button
+            type="button"
+            onClick={onOpenSidebar}
+            className="inline-flex h-11 w-11 items-center justify-center rounded-xl border border-slate-200 text-slate-600 transition-colors hover:bg-slate-100 md:hidden dark:border-slate-800 dark:text-slate-300 dark:hover:bg-slate-800"
+            title="Open menu"
+          >
+            <Menu className="h-5 w-5" />
+          </button>
+          <div className="flex cursor-pointer items-center gap-2" onClick={() => navigate("/")}>
           <span className="relative z-20 flex items-center gap-2 text-xl font-bold tracking-tight text-slate-900 dark:text-slate-50">
             <Command className="h-7 w-7" />
             {t.title || "Qlockify"}
           </span>
         </div>
+        </div>
 
         <div className="flex items-center gap-4">
           {user && <WorkspaceSelector />}
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index 743892a..88afb63 100644
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -1,8 +1,9 @@
-import { useState } from 'react';
-import { NavLink } from 'react-router-dom';
+import { useState } from 'react';
+import { NavLink } from 'react-router-dom';
 import { 
   Users,
   LayoutDashboard, 
+  X,
   PanelLeftClose, 
   PanelLeftOpen, 
   PanelRightClose, 
@@ -11,12 +12,17 @@ import {
   Clock3,
   Tags,
 } from 'lucide-react';
-import { useTranslation } from '../hooks/useTranslation';
-
-export const Sidebar = () => {
-  const [isCollapsed, setIsCollapsed] = useState(false);
-  
-  const { t, lang } = useTranslation();
+import { useTranslation } from '../hooks/useTranslation';
+
+type SidebarProps = {
+  mobileOpen?: boolean;
+  onMobileClose?: () => void;
+};
+
+export const Sidebar = ({ mobileOpen = false, onMobileClose }: SidebarProps) => {
+  const [isCollapsed, setIsCollapsed] = useState(false);
+  
+  const { t, lang } = useTranslation();
   const isRtl = lang === 'fa';
 
   const ToggleIcon = isRtl
@@ -49,57 +55,112 @@ export const Sidebar = () => {
       icon: Briefcase, 
       label: t.sidebar?.projects || 'Projects' 
     },
-  ];
-
-  return (
-    <aside 
-      className={`border-e border-slate-200 dark:border-slate-800 bg-white dark:bg-slate-950 hidden md:flex flex-col h-screen sticky top-0 shrink-0 transition-all duration-300 ease-in-out ${
-        isCollapsed ? 'w-20' : 'w-64'
-      }`}
-    >
-      <div className={`h-18.25 flex items-center border-b border-slate-200 dark:border-slate-800 shrink-0 transition-all ${
-        isCollapsed ? 'justify-center px-0' : 'justify-between px-6'
-      }`}>
-        {!isCollapsed && (
-          <h2 className="text-xl font-bold text-slate-800 dark:text-white truncate">
-            {t.title || "Qlockify"}
-          </h2>
-        )}
-        <button
-          onClick={() => setIsCollapsed(!isCollapsed)}
-          className="p-2 rounded-lg text-slate-500 hover:bg-slate-100 dark:text-slate-400 dark:hover:bg-slate-800 transition-colors"
-          title={isCollapsed ? (t.sidebar?.expand || 'Expand') : (t.sidebar?.collapse || 'Collapse')}
-        >
-          <ToggleIcon size={20} />
-        </button>
-      </div>
-      
-      <nav className="flex-1 p-4 space-y-1 overflow-y-auto overflow-x-hidden">
-        {navItems.map((item) => {
-          const Icon = item.icon;
-          return (
-            <NavLink
-              key={item.path}
-              to={item.path}
-              title={isCollapsed ? item.label : undefined}
-              className={({ isActive }) =>
-                `flex items-center py-2.5 rounded-lg text-sm font-medium transition-colors ${
-                  isCollapsed ? 'justify-center px-0' : 'gap-3 px-3'
-                } ${
-                  isActive
-                    ? 'bg-blue-50 text-blue-600 dark:bg-blue-500/10 dark:text-blue-400'
-                    : 'text-slate-600 hover:bg-slate-100 dark:text-slate-400 dark:hover:bg-slate-900/50'
-                }`
-              }
-            >
-              <Icon size={isCollapsed ? 22 : 18} className="shrink-0" />
-              {!isCollapsed && (
-                <span className="truncate whitespace-nowrap">{item.label}</span>
-              )}
-            </NavLink>
-          );
-        })}
-      </nav>
-    </aside>
-  );
-};
+  ];
+
+  const renderNavItems = (mobile = false) =>
+    navItems.map((item) => {
+      const Icon = item.icon;
+      return (
+        <NavLink
+          key={`${mobile ? 'mobile' : 'desktop'}-${item.path}`}
+          to={item.path}
+          title={!mobile && isCollapsed ? item.label : undefined}
+          onClick={() => {
+            if (mobile) onMobileClose?.();
+          }}
+          className={({ isActive }) =>
+            `flex items-center rounded-lg text-sm font-medium transition-colors ${
+              mobile
+                ? 'gap-3 px-4 py-3'
+                : isCollapsed
+                  ? 'justify-center px-0 py-2.5'
+                  : 'gap-3 px-3 py-2.5'
+            } ${
+              isActive
+                ? 'bg-blue-50 text-blue-600 dark:bg-blue-500/10 dark:text-blue-400'
+                : 'text-slate-600 hover:bg-slate-100 dark:text-slate-400 dark:hover:bg-slate-900/50'
+            }`
+          }
+        >
+          <Icon size={mobile ? 20 : isCollapsed ? 22 : 18} className="shrink-0" />
+          {(mobile || !isCollapsed) && (
+            <span className="truncate whitespace-nowrap">{item.label}</span>
+          )}
+        </NavLink>
+      );
+    });
+
+  return (
+    <>
+      <aside 
+        className={`border-e border-slate-200 dark:border-slate-800 bg-white dark:bg-slate-950 hidden md:flex flex-col h-screen sticky top-0 shrink-0 transition-all duration-300 ease-in-out ${
+          isCollapsed ? 'w-20' : 'w-64'
+        }`}
+      >
+        <div className={`h-18.25 flex items-center border-b border-slate-200 dark:border-slate-800 shrink-0 transition-all ${
+          isCollapsed ? 'justify-center px-0' : 'justify-between px-6'
+        }`}>
+          {!isCollapsed && (
+            <h2 className="text-xl font-bold text-slate-800 dark:text-white truncate">
+              {t.title || "Qlockify"}
+            </h2>
+          )}
+          <button
+            onClick={() => setIsCollapsed(!isCollapsed)}
+            className="p-2 rounded-lg text-slate-500 hover:bg-slate-100 dark:text-slate-400 dark:hover:bg-slate-800 transition-colors"
+            title={isCollapsed ? (t.sidebar?.expand || 'Expand') : (t.sidebar?.collapse || 'Collapse')}
+          >
+            <ToggleIcon size={20} />
+          </button>
+        </div>
+        
+        <nav className="flex-1 p-4 space-y-1 overflow-y-auto overflow-x-hidden">
+          {renderNavItems(false)}
+        </nav>
+      </aside>
+
+      <div
+        className={`fixed inset-0 z-[70] md:hidden transition-all duration-200 ${
+          mobileOpen ? 'pointer-events-auto' : 'pointer-events-none'
+        }`}
+        aria-hidden={!mobileOpen}
+      >
+        <button
+          type="button"
+          className={`absolute inset-0 bg-slate-950/50 backdrop-blur-[1px] transition-opacity ${
+            mobileOpen ? 'opacity-100' : 'opacity-0'
+          }`}
+          onClick={onMobileClose}
+        />
+        <aside
+          className={`absolute inset-y-0 flex w-[18.5rem] max-w-[86vw] flex-col bg-white shadow-2xl transition-transform dark:bg-slate-950 ${
+            isRtl
+              ? `right-0 border-s border-slate-200 dark:border-slate-800 ${
+                  mobileOpen ? 'translate-x-0' : 'translate-x-full'
+                }`
+              : `left-0 border-e border-slate-200 dark:border-slate-800 ${
+                  mobileOpen ? 'translate-x-0' : '-translate-x-full'
+                }`
+          }`}
+        >
+          <div className="flex items-center justify-between border-b border-slate-200 px-5 py-5 dark:border-slate-800">
+            <h2 className="truncate text-lg font-bold text-slate-800 dark:text-white">
+              {t.title || "Qlockify"}
+            </h2>
+            <button
+              type="button"
+              onClick={onMobileClose}
+              className="rounded-lg p-2 text-slate-500 transition-colors hover:bg-slate-100 dark:text-slate-400 dark:hover:bg-slate-800"
+              title="Close"
+            >
+              <X size={20} />
+            </button>
+          </div>
+          <nav className="flex-1 space-y-1 overflow-y-auto p-4">
+            {renderNavItems(true)}
+          </nav>
+        </aside>
+      </div>
+    </>
+  );
+};