diff --git a/.DS_Store b/.DS_Store
index 18829a8..6468cc9 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/App.tsx b/App.tsx
index d423735..cb815dc 100644
--- a/App.tsx
+++ b/App.tsx
@@ -7,10 +7,31 @@ import StepEventType from './components/StepEventType';
 import StepToneGoal from './components/StepToneGoal';
 import StepDetails from './components/StepDetails';
 import StepResult from './components/StepResult';
-import { ChevronLeft, ExternalLink, Sparkles, User } from 'lucide-react';
+import { ChevronLeft, ExternalLink, Sparkles, User, Lock, ArrowRight, AlertCircle, Bug } from 'lucide-react';
 import { generateStoryContent } from './services/geminiService';
 
 const STORAGE_KEY = 'gpx-storyteller-state-v6'; // Incremented version for structure change
+const AUTH_KEY = 'promptstory-auth-token';
+
+// --- PASSWORD CONFIGURATION ---
+
+// 1. Try fetching from Vite standard (import.meta.env)
+// @ts-ignore
+const VITE_ENV_PASS = import.meta.env && import.meta.env.VITE_APP_PASSWORD ? import.meta.env.VITE_APP_PASSWORD : '';
+
+// 2. Try fetching from Process env (sometimes used in other build tools)
+// @ts-ignore
+const PROCESS_ENV_PASS = (typeof process !== 'undefined' && process.env && process.env.VITE_APP_PASSWORD) ? process.env.VITE_APP_PASSWORD : '';
+
+// 3. Fallback (Hardcoded safety net)
+// W tym środowisku (AI Studio/Web Preview) restart serwera jest trudny.
+// Ustawiamy hasło "na sztywno" jako zapas, żeby działało od razu.
+const FALLBACK_PASS = 'Prometeusz'; 
+
+// Decision Logic
+const ENV_PASSWORD = VITE_ENV_PASS || PROCESS_ENV_PASS;
+const APP_PASSWORD = ENV_PASSWORD || FALLBACK_PASS;
+const IS_USING_FALLBACK = !ENV_PASSWORD;
 
 const INITIAL_STATE: WizardState = {
   step: Step.CONTEXT,
@@ -38,7 +59,131 @@ const INITIAL_STATE: WizardState = {
   }
 };
 
+// --- LOGIN SCREEN COMPONENT ---
+const LoginScreen: React.FC<{ onLogin: (success: boolean) => void }> = ({ onLogin }) => {
+    const [input, setInput] = useState('');
+    const [error, setError] = useState(false);
+    const [showDebug, setShowDebug] = useState(false);
+
+    // DEBUGGING: Log to console on mount
+    useEffect(() => {
+        console.group("--- DEBUG PASSWORD SYSTEM ---");
+        console.log("1. Detected VITE_ENV:", VITE_ENV_PASS ? "****" : "(empty)");
+        console.log("2. Detected PROCESS_ENV:", PROCESS_ENV_PASS ? "****" : "(empty)");
+        console.log("3. Final Password Source:", IS_USING_FALLBACK ? "FALLBACK (Hardcoded)" : ".ENV FILE");
+        console.log("4. Active Password Length:", APP_PASSWORD.length);
+        console.groupEnd();
+    }, []);
+
+    const handleSubmit = (e: React.FormEvent) => {
+        e.preventDefault();
+        // Trim input to avoid accidental spaces from copy-paste
+        if (input.trim() === APP_PASSWORD) {
+            onLogin(true);
+        } else {
+            console.log(`Failed Login. Input: "${input}" vs Expected: "${APP_PASSWORD}"`);
+            setError(true);
+            setInput('');
+        }
+    };
+
+    return (
+        <div className="min-h-screen bg-gray-50 flex flex-col items-center justify-center p-4">
+            <div className="bg-white p-8 rounded-xl shadow-lg border border-gray-100 max-w-md w-full text-center space-y-6 animate-fade-in relative">
+                
+                {/* Debug Toggle (Hidden in corner) */}
+                <button 
+                    onClick={() => setShowDebug(!showDebug)}
+                    className="absolute top-2 right-2 text-gray-200 hover:text-gray-400 p-2"
+                    title="Pokaż informacje debugowania"
+                >
+                    <Bug size={16} />
+                </button>
+
+                <div className="flex justify-center mb-2">
+                    <div className="bg-[#EA4420]/10 p-4 rounded-full text-[#EA4420]">
+                        <Lock size={32} />
+                    </div>
+                </div>
+                
+                <div>
+                    <h2 className="text-2xl font-bold text-gray-900">Dostęp Chroniony</h2>
+                    <p className="text-gray-500 mt-2">Wprowadź hasło, aby uzyskać dostęp do kreatora PromptStory.</p>
+                </div>
+
+                <form onSubmit={handleSubmit} className="space-y-4">
+                    <div className="relative">
+                        <input 
+                            type="password" 
+                            value={input}
+                            onChange={(e) => {
+                                setInput(e.target.value);
+                                setError(false);
+                            }}
+                            placeholder="Hasło..."
+                            className={`w-full p-4 border rounded-lg outline-none transition-all font-medium text-center tracking-widest ${
+                                error 
+                                ? 'border-red-300 bg-red-50 focus:border-red-500' 
+                                : 'border-gray-200 focus:border-[#EA4420] focus:ring-1 focus:ring-[#EA4420]'
+                            }`}
+                            autoFocus
+                        />
+                    </div>
+                    
+                    {error && (
+                        <div className="flex items-center justify-center gap-2 text-red-500 text-sm font-medium animate-pulse">
+                            <AlertCircle size={16} />
+                            <span>Nieprawidłowe hasło</span>
+                        </div>
+                    )}
+
+                    <button 
+                        type="submit"
+                        className="w-full bg-[#EA4420] text-white py-4 rounded-lg font-bold hover:bg-[#d63b1a] transition-colors flex items-center justify-center gap-2"
+                    >
+                        <span>Odblokuj</span>
+                        <ArrowRight size={20} />
+                    </button>
+                </form>
+
+                {/* DEBUG PANEL */}
+                {showDebug && (
+                    <div className="bg-gray-800 text-left text-green-400 p-4 rounded-md text-xs font-mono mt-4 overflow-hidden">
+                        <p className="font-bold border-b border-gray-600 mb-2 pb-1 text-white">DEBUG STATUS:</p>
+                        
+                        <div className="grid grid-cols-2 gap-x-4 gap-y-1 mt-2">
+                             <span className="text-gray-400">SOURCE:</span>
+                             <span className={IS_USING_FALLBACK ? "text-yellow-400 font-bold" : "text-green-400 font-bold"}>
+                                {IS_USING_FALLBACK ? "FALLBACK (Code)" : ".ENV FILE"}
+                             </span>
+
+                             <span className="text-gray-400">ACTIVE PASS:</span>
+                             <span>{APP_PASSWORD.substring(0, 4)}... (len: {APP_PASSWORD.length})</span>
+                        </div>
+                        
+                        {IS_USING_FALLBACK && (
+                            <div className="mt-3 text-yellow-500 border-t border-gray-600 pt-2">
+                                <p>System używa hasła awaryjnego zdefiniowanego w kodzie, ponieważ nie może odświeżyć pliku .env bez restartu.</p>
+                                <p className="mt-1 font-bold text-white">Twoje hasło powinno teraz działać.</p>
+                            </div>
+                        )}
+                    </div>
+                )}
+
+                <p className="text-xs text-gray-300 pt-4">
+                    PromptStory v1.0 • Private Instance
+                </p>
+            </div>
+        </div>
+    );
+};
+
 const App: React.FC = () => {
+  // Auth State
+  const [isAuthenticated, setIsAuthenticated] = useState(false);
+  const [isAuthChecking, setIsAuthChecking] = useState(true);
+
+  // App State
   const [data, setData] = useState<WizardState>(INITIAL_STATE);
   const [generatedContent, setGeneratedContent] = useState<GeneratedContent | null>(null);
   const [isGenerating, setIsGenerating] = useState(false);
@@ -49,7 +194,29 @@ const App: React.FC = () => {
   const [logoError, setLogoError] = useState(false);
   const [avatarError, setAvatarError] = useState(false);
 
-  // Persistence Logic
+  // 1. Check Auth on Mount
+  useEffect(() => {
+      const storedAuth = localStorage.getItem(AUTH_KEY);
+      if (storedAuth === 'true') {
+          setIsAuthenticated(true);
+      }
+      setIsAuthChecking(false);
+  }, []);
+
+  const handleLogin = (success: boolean) => {
+      if (success) {
+          localStorage.setItem(AUTH_KEY, 'true');
+          setIsAuthenticated(true);
+      }
+  };
+
+  const handleLogout = () => {
+      localStorage.removeItem(AUTH_KEY);
+      setIsAuthenticated(false);
+      resetApp();
+  };
+
+  // 2. Load Data Persistence Logic
   useEffect(() => {
     const saved = localStorage.getItem(STORAGE_KEY);
     if (saved) {
@@ -154,7 +321,13 @@ const App: React.FC = () => {
     window.location.reload();
   };
 
-  if (!isLoaded) return null;
+  // --- RENDER LOGIC ---
+
+  if (isAuthChecking || !isLoaded) return null; // Loading state
+
+  if (!isAuthenticated) {
+      return <LoginScreen onLogin={handleLogin} />;
+  }
 
   // Step Labels for Progress Bar (Order Changed)
   const stepsLabels = ['Kontekst', 'Typ', 'Platforma', 'Vibe & Cel', 'Szczegóły'];
@@ -179,9 +352,15 @@ const App: React.FC = () => {
              )}
              <h1 className="text-xl font-bold tracking-tight text-gray-900">PromptStory</h1>
           </div>
-          <button onClick={resetApp} className="text-xs font-medium text-gray-400 hover:text-[#EA4420] transition-colors uppercase tracking-wide">
-            Resetuj
-          </button>
+          
+          <div className="flex items-center gap-4">
+              <button onClick={resetApp} className="text-xs font-medium text-gray-400 hover:text-[#EA4420] transition-colors uppercase tracking-wide">
+                Resetuj
+              </button>
+              <button onClick={handleLogout} className="text-xs font-medium text-gray-400 hover:text-red-500 transition-colors uppercase tracking-wide">
+                Wyloguj
+              </button>
+          </div>
         </div>
       </header>
 
diff --git a/index.tsx b/index.tsx
index 6ca5361..39e1012 100644
--- a/index.tsx
+++ b/index.tsx
@@ -12,4 +12,4 @@ root.render(
   <React.StrictMode>
     <App />
   </React.StrictMode>
-);
\ No newline at end of file
+);