diff --git a/frontend/css/style.css b/frontend/css/style.css
index 397d085..fc8793e 100644
--- a/frontend/css/style.css
+++ b/frontend/css/style.css
@@ -94,13 +94,81 @@ html, body {
   100% { transform: scale(1); opacity: 0.7; }
 }
 
-/* Zone admin invisible */
-.zone-admin {
+/* Bouton admin discret */
+.btn-admin {
   position: absolute;
-  bottom: 0;
-  right: 0;
-  width: 80px;
-  height: 80px;
+  bottom: 12px;
+  right: 12px;
+  width: 40px;
+  height: 40px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 1.2rem;
+  color: rgba(255,255,255,0.15);
+  cursor: pointer;
+  border-radius: 50%;
+  transition: color 0.3s;
+}
+
+.btn-admin:hover, .btn-admin:active {
+  color: rgba(255,255,255,0.4);
+}
+
+/* Popup mot de passe */
+.popup-overlay {
+  position: fixed;
+  top: 0; left: 0;
+  width: 100%; height: 100%;
+  background: rgba(0,0,0,0.7);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 100;
+}
+
+.popup-box {
+  background: var(--fond-carte);
+  border-radius: var(--rayon);
+  padding: 2rem;
+  min-width: 300px;
+  display: flex;
+  flex-direction: column;
+  gap: 1rem;
+  align-items: center;
+  box-shadow: var(--ombre);
+}
+
+.popup-box h3 {
+  color: var(--texte);
+  margin: 0;
+}
+
+.popup-box input {
+  background: var(--fond);
+  border: 2px solid #333;
+  border-radius: 8px;
+  padding: 0.8rem 1.2rem;
+  color: var(--texte);
+  font-size: 1.5rem;
+  text-align: center;
+  letter-spacing: 0.3em;
+  width: 200px;
+  outline: none;
+}
+
+.popup-box input:focus {
+  border-color: var(--primaire);
+}
+
+.popup-actions {
+  display: flex;
+  gap: 1rem;
+}
+
+.mdp-erreur {
+  color: var(--danger);
+  font-size: 0.9rem;
 }
 
 /* === Choix du mode === */
diff --git a/frontend/index.html b/frontend/index.html
index 6836adf..c46185f 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -21,8 +21,8 @@
           <span id="compteur-restant">400</span> / <span id="compteur-limite">400</span>
         </div>
       </div>
-      <!-- Zone admin : coin bas-droit, appui long 3s -->
-      <div id="zone-admin" class="zone-admin"></div>
+      <!-- Icone admin coin bas-droit -->
+      <div id="btn-admin" class="btn-admin" onclick="ouvrirAdmin()">&#9881;</div>
     </section>
 
     <!-- Choix du mode -->
@@ -323,6 +323,19 @@
       </div>
     </section>
 
+    <!-- Popup mot de passe admin -->
+    <div id="popup-mdp" class="popup-overlay cache">
+      <div class="popup-box">
+        <h3>Acces administration</h3>
+        <input type="password" id="input-mdp-admin" placeholder="Mot de passe" inputmode="numeric" autocomplete="off">
+        <div class="popup-actions">
+          <button class="btn-action" onclick="validerMdpAdmin()">OK</button>
+          <button class="btn-secondaire" onclick="fermerPopupMdp()">Annuler</button>
+        </div>
+        <p id="mdp-erreur" class="mdp-erreur cache">Mot de passe incorrect</p>
+      </div>
+    </div>
+
   </div>
 
   <script src="/js/websocket.js"></script>
diff --git a/frontend/js/app.js b/frontend/js/app.js
index 86f9984..cceb20a 100644
--- a/frontend/js/app.js
+++ b/frontend/js/app.js
@@ -73,38 +73,50 @@ function recommencer() {
 function setupEcranAccueil() {
   const accueil = document.getElementById('ecran-accueil');
 
-  // Toucher pour commencer
+  // Toucher pour commencer (ignorer le bouton admin et le popup)
   accueil.addEventListener('click', (e) => {
-    // Ignorer si c'est la zone admin
-    if (e.target.closest('.zone-admin')) return;
+    if (e.target.closest('.btn-admin')) return;
     allerA('mode');
   });
-
-  // Zone admin : appui long 3s
-  const zoneAdmin = document.getElementById('zone-admin');
-  let timerAdmin = null;
-
-  zoneAdmin.addEventListener('touchstart', (e) => {
-    e.preventDefault();
-    e.stopPropagation();
-    timerAdmin = setTimeout(() => allerA('admin'), 3000);
-  });
-
-  zoneAdmin.addEventListener('touchend', () => {
-    if (timerAdmin) clearTimeout(timerAdmin);
-  });
-
-  // Support souris aussi (pour dev)
-  zoneAdmin.addEventListener('mousedown', (e) => {
-    e.stopPropagation();
-    timerAdmin = setTimeout(() => allerA('admin'), 3000);
-  });
-
-  zoneAdmin.addEventListener('mouseup', () => {
-    if (timerAdmin) clearTimeout(timerAdmin);
-  });
 }
 
+// --- Admin : icone + mot de passe ---
+
+const MDP_ADMIN = '1234';
+
+function ouvrirAdmin() {
+  const popup = document.getElementById('popup-mdp');
+  const input = document.getElementById('input-mdp-admin');
+  popup.classList.remove('cache');
+  input.value = '';
+  document.getElementById('mdp-erreur').classList.add('cache');
+  setTimeout(() => input.focus(), 100);
+}
+
+function fermerPopupMdp() {
+  document.getElementById('popup-mdp').classList.add('cache');
+  document.getElementById('input-mdp-admin').value = '';
+}
+
+function validerMdpAdmin() {
+  const input = document.getElementById('input-mdp-admin');
+  if (input.value === MDP_ADMIN) {
+    fermerPopupMdp();
+    allerA('admin');
+  } else {
+    document.getElementById('mdp-erreur').classList.remove('cache');
+    input.value = '';
+    input.focus();
+  }
+}
+
+// Valider avec Entree
+document.addEventListener('keydown', (e) => {
+  if (e.key === 'Enter' && !document.getElementById('popup-mdp').classList.contains('cache')) {
+    validerMdpAdmin();
+  }
+});
+
 // --- Modes ---
 
 function setupModes() {