diff --git a/frontend/src/components/ConfigurationView.jsx b/frontend/src/components/ConfigurationView.jsx
index 34f7271..dd2ef4b 100644
--- a/frontend/src/components/ConfigurationView.jsx
+++ b/frontend/src/components/ConfigurationView.jsx
@@ -44,6 +44,8 @@ function ConfigurationView({
   libraryResetError,
   libraryResetMessage,
   isResettingLibrary,
+  isLibraryResetConfirmationOpen,
+  waitingValidationResetCount,
   platformCatalogSyncError,
   platformCatalogSyncMessage,
   isSyncingPlatformCatalog,
@@ -63,6 +65,8 @@ function ConfigurationView({
   onOpenCollectionShares,
   onDownloadOds,
   onResetLibrary,
+  onCancelLibraryReset,
+  onConfirmLibraryReset,
   onSyncPlatformCatalog,
   onReinitializeCollection,
   onLogout,
@@ -256,8 +260,81 @@ function ConfigurationView({
           </article>
         ) : null}
       </section>
+
+      <LibraryResetConfirmationDialog
+        isOpen={isLibraryResetConfirmationOpen}
+        isResettingLibrary={isResettingLibrary}
+        waitingValidationCount={waitingValidationResetCount}
+        onCancel={onCancelLibraryReset}
+        onConfirm={onConfirmLibraryReset}
+      />
     </PageLayout>
   );
 }
 
+/**
+ * Affiche la confirmation du reset Bibliotheque.
+ *
+ * @param {Object} props - Etat de la pop-up et callbacks de confirmation.
+ * @returns {import("react").JSX.Element|null} Pop-up de confirmation ou rien.
+ * @throws {void} Ne leve pas d'exception pendant le rendu React.
+ */
+function LibraryResetConfirmationDialog({
+  isOpen,
+  isResettingLibrary,
+  waitingValidationCount,
+  onCancel,
+  onConfirm,
+}) {
+  if (!isOpen) {
+    return null;
+  }
+
+  return (
+    <div className="modalOverlay" role="presentation">
+      <section
+        className="adminResetConfirmationDialog"
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="admin-reset-confirmation-title"
+      >
+        <header>
+          <p className="eyebrow">Confirmation</p>
+          <h2 id="admin-reset-confirmation-title">Confirmer le reset Bibliotheque</h2>
+        </header>
+        <p>
+          ATTENTION : ce reset supprime et reconstruit toute la Bibliotheque globale a partir des
+          imports utilisateur.
+        </p>
+        {Number(waitingValidationCount) > 0 ? (
+          <p className="adminResetValidationWarning">
+            <strong>{waitingValidationCount} jeu(x)</strong>
+            {" "}
+            marque(s) comme en attente de validation seront automatiquement acceptes si le reset est
+            lance.
+          </p>
+        ) : null}
+        <div className="formActions">
+          <button
+            className="secondaryButton"
+            type="button"
+            onClick={onCancel}
+            disabled={isResettingLibrary}
+          >
+            Annuler
+          </button>
+          <button
+            className="dangerButton"
+            type="button"
+            onClick={onConfirm}
+            disabled={isResettingLibrary}
+          >
+            Confirmer le reset
+          </button>
+        </div>
+      </section>
+    </div>
+  );
+}
+
 export default ConfigurationView;
diff --git a/frontend/src/components/appViewSwitchConfigurationRenderer.jsx b/frontend/src/components/appViewSwitchConfigurationRenderer.jsx
index 52a1da7..5e75c3b 100644
--- a/frontend/src/components/appViewSwitchConfigurationRenderer.jsx
+++ b/frontend/src/components/appViewSwitchConfigurationRenderer.jsx
@@ -33,6 +33,8 @@ function renderConfigurationView(props, pageLayoutProps) {
       libraryResetError={props.libraryResetError}
       libraryResetMessage={props.libraryResetMessage}
       isResettingLibrary={props.isResettingLibrary}
+      isLibraryResetConfirmationOpen={props.isLibraryResetConfirmationOpen}
+      waitingValidationResetCount={props.waitingValidationResetCount}
       platformCatalogSyncError={props.platformCatalogSyncError}
       platformCatalogSyncMessage={props.platformCatalogSyncMessage}
       isSyncingPlatformCatalog={props.isSyncingPlatformCatalog}
@@ -45,6 +47,8 @@ function renderConfigurationView(props, pageLayoutProps) {
       onOpenCollectionShares={props.openCollectionShares}
       onDownloadOds={props.downloadOdsFile}
       onResetLibrary={props.resetLibrary}
+      onCancelLibraryReset={props.cancelLibraryReset}
+      onConfirmLibraryReset={props.confirmLibraryReset}
       onSyncPlatformCatalog={props.syncPlatformCatalog}
       onReinitializeCollection={props.reinitializeCollection}
     />
diff --git a/frontend/src/hooks/app/useCloudCollectionViewModel.js b/frontend/src/hooks/app/useCloudCollectionViewModel.js
index 7b42afa..84b7f6b 100644
--- a/frontend/src/hooks/app/useCloudCollectionViewModel.js
+++ b/frontend/src/hooks/app/useCloudCollectionViewModel.js
@@ -280,6 +280,8 @@ function useCloudCollectionViewModel() {
       libraryResetError: libraryResetAction.libraryResetError,
       libraryResetMessage: libraryResetAction.libraryResetMessage,
       isResettingLibrary: libraryResetAction.isResettingLibrary,
+      isLibraryResetConfirmationOpen: libraryResetAction.isLibraryResetConfirmationOpen,
+      waitingValidationResetCount: libraryResetAction.waitingValidationCount,
       adminLibraryImportError: adminLibraryCsvImportAction.adminLibraryImportError,
       adminLibraryImportResult: adminLibraryCsvImportAction.adminLibraryImportResult,
       isImportingAdminLibrary: adminLibraryCsvImportAction.isImportingAdminLibrary,
@@ -326,6 +328,8 @@ function useCloudCollectionViewModel() {
       closeHomeSearch: homePage.closeHomeSearch,
       downloadOdsFile: odsDownload.downloadOdsFile,
       resetLibrary: libraryResetAction.resetLibrary,
+      cancelLibraryReset: libraryResetAction.cancelLibraryReset,
+      confirmLibraryReset: libraryResetAction.confirmLibraryReset,
       importAdminLibraryCsv: adminLibraryCsvImportAction.importAdminLibraryCsv,
       selectAdminLibraryImportFile: adminLibraryCsvImportAction.selectAdminLibraryImportFile,
       syncPlatformCatalog: platformCatalogSyncAction.syncPlatformCatalog,
diff --git a/frontend/src/hooks/library/useLibraryResetAction.js b/frontend/src/hooks/library/useLibraryResetAction.js
index 7edc9be..92a3cb7 100644
--- a/frontend/src/hooks/library/useLibraryResetAction.js
+++ b/frontend/src/hooks/library/useLibraryResetAction.js
@@ -30,13 +30,14 @@ function useLibraryResetAction(options = {}) {
   const [libraryResetMessage, setLibraryResetMessage] = useState("");
   const [libraryResetError, setLibraryResetError] = useState("");
   const [isResettingLibrary, setIsResettingLibrary] = useState(false);
+  const [isLibraryResetConfirmationOpen, setIsLibraryResetConfirmationOpen] = useState(false);
   const waitingValidationCount = Math.max(
     0,
     Number.parseInt(options.waitingValidationCount, 10) || 0
   );
 
   /**
-   * Demande confirmation puis appelle le backend de reset Bibliotheque.
+   * Ouvre la confirmation du reset Bibliotheque.
    *
    * @returns {Promise<void>} Met a jour les messages de resultat.
    * @throws {void} Les erreurs sont converties en message lisible.
@@ -44,11 +45,37 @@ function useLibraryResetAction(options = {}) {
   const resetLibrary = async () => {
     setLibraryResetMessage("");
     setLibraryResetError("");
-    const confirmed = window.confirm(buildLibraryResetConfirmationMessage(waitingValidationCount));
-    if (!confirmed) {
-      return;
-    }
+    setIsLibraryResetConfirmationOpen(true);
+  };
+
+  /**
+   * Confirme le reset apres affichage de la pop-up de confirmation.
+   *
+   * @returns {Promise<void>} Lance le reset apres fermeture de la pop-up.
+   * @throws {void} Les erreurs sont converties en message lisible.
+   */
+  const confirmLibraryReset = async () => {
+    setIsLibraryResetConfirmationOpen(false);
+    await launchLibraryReset();
+  };
+
+  /**
+   * Annule la demande de reset depuis la pop-up de confirmation.
+   *
+   * @returns {void} Ferme la pop-up sans appeler le backend.
+   * @throws {void} Ne leve pas d'exception.
+   */
+  const cancelLibraryReset = () => {
+    setIsLibraryResetConfirmationOpen(false);
+  };
 
+  /**
+   * Appelle le backend de reset Bibliotheque apres confirmation.
+   *
+   * @returns {Promise<void>} Met a jour les messages de resultat.
+   * @throws {void} Les erreurs sont converties en message lisible.
+   */
+  const launchLibraryReset = async () => {
     try {
       setIsResettingLibrary(true);
       await LibraryAdminApi.resetLibrary();
@@ -67,29 +94,15 @@ function useLibraryResetAction(options = {}) {
   };
 
   return {
+    cancelLibraryReset,
+    confirmLibraryReset,
+    isLibraryResetConfirmationOpen,
     isResettingLibrary,
     libraryResetError,
     libraryResetMessage,
     resetLibrary,
+    waitingValidationCount,
   };
 }
 
-/**
- * Construit le message de confirmation du reset Bibliotheque.
- *
- * @param {number} waitingValidationCount - Nombre de jeux actuellement en attente.
- * @returns {string} Message de confirmation affiche a l'administrateur.
- * @throws {void} Ne leve pas d'exception.
- */
-function buildLibraryResetConfirmationMessage(waitingValidationCount = 0) {
-  const baseMessage = (
-    "ATTENTION : ce reset supprime et reconstruit toute la Bibliotheque globale a partir des imports utilisateur."
-  );
-  const waitingMessage = Number(waitingValidationCount) > 0
-    ? ` ${waitingValidationCount} jeu(x) en attente seront valides automatiquement par le reset.`
-    : "";
-  return `${baseMessage}${waitingMessage} Confirmer le lancement ?`;
-}
-
-export { buildLibraryResetConfirmationMessage };
 export default useLibraryResetAction;
diff --git a/frontend/src/styles/admin.css b/frontend/src/styles/admin.css
index 13108f2..9dfb1b8 100644
--- a/frontend/src/styles/admin.css
+++ b/frontend/src/styles/admin.css
@@ -77,6 +77,33 @@
   border-color: #991b1b;
 }
 
+.adminResetConfirmationDialog {
+  background: #ffffff;
+  border: 1px solid #fecaca;
+  border-radius: 8px;
+  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.28);
+  display: grid;
+  gap: 1rem;
+  padding: 1.25rem;
+  width: min(100%, 34rem);
+}
+
+.adminResetConfirmationDialog h2 {
+  color: #111827;
+  font-size: 1.25rem;
+  margin: 0;
+}
+
+.adminResetConfirmationDialog p {
+  color: #334155;
+  margin: 0;
+}
+
+.adminResetValidationWarning strong {
+  color: #b91c1c;
+  font-weight: 900;
+}
+
 .usersTableSection {
   margin-top: 1.5rem;
 }
diff --git a/frontend/tests/gameValidationWorkflow.test.js b/frontend/tests/gameValidationWorkflow.test.js
index 569bbbc..0bd999f 100644
--- a/frontend/tests/gameValidationWorkflow.test.js
+++ b/frontend/tests/gameValidationWorkflow.test.js
@@ -14,7 +14,6 @@ import BackendRouteAccessService from "../src/services/BackendRouteAccessService
 import LibraryAdminApi from "../src/services/LibraryAdminApi.js";
 import LibraryApi from "../src/services/LibraryApi.js";
 import { getLibraryGameColumns } from "../src/hooks/library/libraryGameColumns.js";
-import { buildLibraryResetConfirmationMessage } from "../src/hooks/library/useLibraryResetAction.js";
 
 class MemoryStorage {
   /** Initialise un stockage navigateur en memoire. */
@@ -107,11 +106,38 @@ test("derive la permission de gestion validation jeux depuis les routes admin",
   assert.equal(userPermissions.canManageGameValidation, false);
 });
 
-test("ajoute l'avertissement de validation automatique dans la confirmation reset", () => {
-  const message = buildLibraryResetConfirmationMessage(4);
+test("declare la pop-up de confirmation reset permanente avec compteur colore", () => {
+  const hookSource = readFileSync(
+    new URL("../src/hooks/library/useLibraryResetAction.js", import.meta.url),
+    "utf8"
+  );
+  const configurationSource = readFileSync(
+    new URL("../src/components/ConfigurationView.jsx", import.meta.url),
+    "utf8"
+  );
+  const rendererSource = readFileSync(
+    new URL("../src/components/appViewSwitchConfigurationRenderer.jsx", import.meta.url),
+    "utf8"
+  );
+  const adminStyleSource = readFileSync(
+    new URL("../src/styles/admin.css", import.meta.url),
+    "utf8"
+  );
 
-  assert.equal(message.includes("4 jeu(x) en attente"), true);
-  assert.equal(message.includes("valides automatiquement"), true);
+  assert.equal(hookSource.includes("isLibraryResetConfirmationOpen"), true);
+  assert.equal(hookSource.includes("setIsLibraryResetConfirmationOpen(true)"), true);
+  assert.equal(hookSource.includes("window.confirm"), false);
+  assert.equal(configurationSource.includes("LibraryResetConfirmationDialog"), true);
+  assert.equal(configurationSource.includes("ATTENTION : ce reset supprime"), true);
+  assert.equal(configurationSource.includes("Number(waitingValidationCount) > 0"), true);
+  assert.equal(configurationSource.includes("<strong>{waitingValidationCount} jeu(x)</strong>"), true);
+  assert.equal(configurationSource.includes("seront automatiquement acceptes"), true);
+  assert.equal(configurationSource.includes("Annuler"), true);
+  assert.equal(configurationSource.includes("Confirmer le reset"), true);
+  assert.equal(rendererSource.includes("onCancelLibraryReset"), true);
+  assert.equal(rendererSource.includes("onConfirmLibraryReset"), true);
+  assert.equal(adminStyleSource.includes(".adminResetValidationWarning strong"), true);
+  assert.equal(adminStyleSource.includes("font-weight: 900"), true);
 });
 
 test("declare les controles admin de filtre, selection et badge Bibliotheque", () => {