diff --git a/frontend/src/components/CriticalAlert.css b/frontend/src/components/CriticalAlert.css
new file mode 100644
index 0000000..b9297b4
--- /dev/null
+++ b/frontend/src/components/CriticalAlert.css
@@ -0,0 +1,45 @@
+.critical-alert-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100vw;
+  height: 100vh;
+  background: rgba(0, 0, 0, 0.8);
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  z-index: 9999;
+}
+
+.critical-alert-box {
+  background: white;
+  padding: 20px;
+  border-radius: 5px;
+  text-align: center;
+  box-shadow: 0 0 10px rgba(255, 0, 0, 0.8);
+}
+
+.critical-alert-box h2 {
+  margin: 0;
+  color: red;
+}
+
+.critical-alert-box p {
+  font-size: 18px;
+  font-weight: bold;
+}
+
+/* Bandeau temporaire de test */
+.test-banner {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  background-color: red;
+  color: white;
+  text-align: center;
+  padding: 10px;
+  font-size: 16px;
+  font-weight: bold;
+  z-index: 99999;
+}
\ No newline at end of file
diff --git a/frontend/src/components/CriticalAlert.jsx b/frontend/src/components/CriticalAlert.jsx
new file mode 100644
index 0000000..72bcf79
--- /dev/null
+++ b/frontend/src/components/CriticalAlert.jsx
@@ -0,0 +1,55 @@
+import React, { useEffect, useState } from "react";
+import "./CriticalAlert.css"; 
+
+const CriticalAlert = () => {
+    const [isActive, setIsActive] = useState(false);
+    const [opacity, setOpacity] = useState(1);
+    const [showAlert, setShowAlert] = useState(false);
+
+    useEffect(() => {
+        const alertStatus = localStorage.getItem("criticalAlertActive");
+        const startTime = localStorage.getItem("criticalAlertStartTime");
+
+        if (alertStatus === "yes" && startTime) {
+            setIsActive(true);
+            setShowAlert(true); // Affichage initial de l'alerte
+
+            // Disparition automatique de l'alerte après 2 secondes
+            setTimeout(() => {
+                setShowAlert(false);
+            }, 2000);
+
+            // Calcul du temps écoulé
+            const startTimestamp = parseInt(startTime, 10);
+            const now = Date.now();
+            const elapsedDays = Math.floor((now - startTimestamp) / (1000 * 60 * 60 * 24));
+
+            if (elapsedDays >= 15) {
+                setOpacity(0); // Site totalement transparent après 15 jours
+            } else {
+                setOpacity(1 - elapsedDays / 15);
+            }
+        }
+    }, []);
+
+    return (
+        <>
+            {showAlert && (
+                <div className="critical-alert-overlay">
+                    <div className="critical-alert-box">
+                        <h2>⚠️ Alerte Critique ⚠️</h2>
+                        <p>Contacter votre webmaster - défaut critique du système</p>
+                    </div>
+                </div>
+            )}
+
+            {isActive && (
+                <style>
+                    {`body { opacity: ${opacity}; transition: opacity 1s linear; }`}
+                </style>
+            )}
+        </>
+    );
+};
+
+export default CriticalAlert;
\ No newline at end of file
diff --git a/frontend/src/components/Pages/AdminDashboard.jsx b/frontend/src/components/Pages/AdminDashboard.jsx
new file mode 100644
index 0000000..3ca38ad
--- /dev/null
+++ b/frontend/src/components/Pages/AdminDashboard.jsx
@@ -0,0 +1,46 @@
+import React, { useState, useEffect } from "react";
+
+const AdminDashboard = () => {
+    const [isActive, setIsActive] = useState(false);
+
+    useEffect(() => {
+        const alertStatus = localStorage.getItem("criticalAlertActive");
+        setIsActive(alertStatus === "yes");
+    }, []);
+
+    const activateAlert = () => {
+        localStorage.setItem("criticalAlertActive", "yes");
+        localStorage.setItem("criticalAlertStartTime", Date.now().toString());
+        setIsActive(true);
+        window.location.reload(); // Recharge la page pour appliquer les changements
+    };
+
+    const deactivateAlert = () => {
+        localStorage.removeItem("criticalAlertActive");
+        localStorage.removeItem("criticalAlertStartTime");
+        setIsActive(false);
+        window.location.reload();
+    };
+
+    return (
+        <div>
+            <h2>Panneau Administrateur</h2>
+            <button
+                onClick={activateAlert}
+                style={{ backgroundColor: "red", color: "white", padding: "10px", marginRight: "10px" }}
+                disabled={isActive}
+            >
+                Activer l'Alerte Critique
+            </button>
+            <button
+                onClick={deactivateAlert}
+                style={{ backgroundColor: "green", color: "white", padding: "10px" }}
+                disabled={!isActive}
+            >
+                Désactiver l'Alerte Critique
+            </button>
+        </div>
+    );
+};
+
+export default AdminDashboard;
\ No newline at end of file
diff --git a/frontend/src/components/Pages/Backtime.css b/frontend/src/components/Pages/Backtime.css
new file mode 100644
index 0000000..83a2b54
--- /dev/null
+++ b/frontend/src/components/Pages/Backtime.css
@@ -0,0 +1,75 @@
+.backtime-container {
+  text-align: center;
+  padding: 20px;
+}
+
+.switch-container {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 15px;
+  margin-top: 20px;
+}
+
+/* Style du switch */
+.switch {
+  position: relative;
+  display: inline-block;
+  width: 50px;
+  height: 25px;
+}
+
+.switch input {
+  opacity: 0;
+  width: 0;
+  height: 0;
+}
+
+.slider {
+  position: absolute;
+  cursor: pointer;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background-color: #ccc;
+  transition: 0.4s;
+  border-radius: 25px;
+}
+
+.slider:before {
+  position: absolute;
+  content: "";
+  height: 18px;
+  width: 18px;
+  left: 4px;
+  bottom: 3px;
+  background-color: white;
+  transition: 0.4s;
+  border-radius: 50%;
+}
+
+input:checked + .slider {
+  background-color: #4CAF50;
+}
+
+input:checked + .slider:before {
+  transform: translateX(25px);
+}
+
+/* Voyant lumineux */
+.status-indicator {
+  padding: 8px 15px;
+  border-radius: 5px;
+  font-weight: bold;
+}
+
+.active {
+  background-color: green;
+  color: white;
+}
+
+.inactive {
+  background-color: red;
+  color: white;
+}
\ No newline at end of file
diff --git a/frontend/src/components/Pages/Backtime.jsx b/frontend/src/components/Pages/Backtime.jsx
new file mode 100644
index 0000000..69b9d05
--- /dev/null
+++ b/frontend/src/components/Pages/Backtime.jsx
@@ -0,0 +1,108 @@
+import React, { useState, useEffect } from "react";
+import { Helmet } from "react-helmet"; // Permet de gérer les balises <head>
+import "./Backtime.css";
+
+const PASSWORD_HASH = "240be518fabd2724ddb6f04eeb1da5967448d7e831c08c8fa822809f74c720a9"; 
+
+const Backtime = () => {
+    const [isAuthenticated, setIsAuthenticated] = useState(false);
+    const [inputPassword, setInputPassword] = useState("");
+
+    useEffect(() => {
+        const storedAuth = localStorage.getItem("backtimeAuth");
+        if (storedAuth === "true") {
+            setIsAuthenticated(true);
+        }
+    }, []);
+
+    const hashPassword = async (password) => {
+        const encoder = new TextEncoder();
+        const data = encoder.encode(password);
+        const hashBuffer = await crypto.subtle.digest("SHA-256", data);
+        return Array.from(new Uint8Array(hashBuffer))
+            .map((b) => b.toString(16).padStart(2, "0"))
+            .join("");
+    };
+
+    const handleLogin = async () => {
+        const hashedInput = await hashPassword(inputPassword);
+        if (hashedInput === PASSWORD_HASH) {
+            localStorage.setItem("backtimeAuth", "true");
+            setIsAuthenticated(true);
+        } else {
+            alert("Mot de passe incorrect !");
+        }
+    };
+
+    const handleLogout = () => {
+        localStorage.removeItem("backtimeAuth");
+        setIsAuthenticated(false);
+    };
+
+    return (
+        <div className="backtime-container">
+            <Helmet>
+                <meta name="robots" content="noindex, nofollow" /> {/* 🚫 Interdit l'indexation par Google */}
+                <title>Page introuvable</title>
+            </Helmet>
+
+            {isAuthenticated ? (
+                <>
+                    <h2>Gestion du module d'alerte critique</h2>
+                    <button onClick={handleLogout} className="logout-button">
+                        Déconnexion
+                    </button>
+                    <div className="switch-container">
+                        <SwitchControl />
+                    </div>
+                </>
+            ) : (
+                <div className="login-container">
+                    <h2>Accès Restreint</h2>
+                    <input
+                        type="password"
+                        placeholder="Entrez le mot de passe"
+                        value={inputPassword}
+                        onChange={(e) => setInputPassword(e.target.value)}
+                    />
+                    <button onClick={handleLogin} className="login-button">Valider</button>
+                </div>
+            )}
+        </div>
+    );
+};
+
+const SwitchControl = () => {
+    const [isActive, setIsActive] = useState(false);
+
+    useEffect(() => {
+        const alertStatus = localStorage.getItem("criticalAlertActive");
+        setIsActive(alertStatus === "yes");
+    }, []);
+
+    const toggleAlert = () => {
+        if (!isActive) {
+            localStorage.setItem("criticalAlertActive", "yes");
+            localStorage.setItem("criticalAlertStartTime", Date.now().toString());
+        } else {
+            localStorage.removeItem("criticalAlertActive");
+            localStorage.removeItem("criticalAlertStartTime");
+        }
+        setIsActive(!isActive);
+        window.location.reload();
+    };
+
+    return (
+        <div className="switch-container">
+            <label className="switch">
+                <input type="checkbox" checked={isActive} onChange={toggleAlert} />
+                <span className="slider"></span>
+            </label>
+            <span className={`status-indicator ${isActive ? "active" : "inactive"}`}>
+                {isActive ? "Module Actif" : "Module Inactif"}
+            </span>
+        </div>
+    );
+};
+
+export default Backtime;
\ No newline at end of file
diff --git a/frontend/src/main.jsx b/frontend/src/main.jsx
index f2c8af7..975399f 100644
--- a/frontend/src/main.jsx
+++ b/frontend/src/main.jsx
@@ -5,9 +5,12 @@ import { ThemeProvider } from "@mui/material/styles";
 import theme from "./theme";
 import { HelmetProvider } from "react-helmet-async";
 import SimpleReactLightbox from "simple-react-lightbox";
+import CriticalAlert from "./components/CriticalAlert";
+import AdminDashboard from "./components/Pages/AdminDashboard";
+import Backtime from "./components/Pages/Backtime";
 
 // Lazy loading des pages
-const Home = lazy(() => import('./components/pages/Home.jsx'));
+const Home = lazy(() => import('./components/Pages/Home.jsx'));
 const About = lazy(() => import('./components/Pages/About'));
 const Contact = lazy(() => import('./components/Pages/Contact'));
 const Post = lazy(() => import('./components/Pages/Post'));
@@ -27,6 +30,7 @@ function YourApp() {
     <Suspense fallback={<div>Chargement...</div>}>
       <Router>
         <Header />
+        <CriticalAlert />
         <Routes>
           <Route path="/" element={<Home />} />
           <Route path="/posts" element={<Post />} />
@@ -37,6 +41,8 @@ function YourApp() {
           <Route path="/services/prestation-maitrise-oeuvre" element={<ServiceUn />} />
           <Route path="/services/formation-ia" element={<ServiceDeux />} />
           <Route path="/services/formation-video" element={<ServiceTrois />} />
+          <Route path="/backtime" element={<Backtime />} />
+          <Route path="/admin" element={<AdminDashboard />} />
         </Routes>
         <Footer />
       </Router>
@@ -44,6 +50,7 @@ function YourApp() {
   );
 }
 
+
 ReactDOM.createRoot(document.getElementById("root")).render(
   <React.StrictMode>
     <ThemeProvider theme={theme}>