diff --git a/backend/src/routes/admin.routes.ts b/backend/src/routes/admin.routes.ts
index f59a0d1..340f7fa 100644
--- a/backend/src/routes/admin.routes.ts
+++ b/backend/src/routes/admin.routes.ts
@@ -99,7 +99,7 @@ router.get("/videos", async (req: Request, res: Response): Promise<void> => {
       skip: (rawPage - 1) * rawLimit,
       take: rawLimit,
     });
-    res.json({ success: true, data: videos, total, page: rawPage, limit: rawLimit });
+    res.json({ success: true, data: { videos }, total, page: rawPage, limit: rawLimit });
   } catch (err) {
     logger.error("GET /admin/videos — failed to list videos", { err });
     res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
@@ -262,13 +262,43 @@ router.get("/users", async (req: Request, res: Response): Promise<void> => {
       })(),
     }));
 
-    res.json({ success: true, data, total, page: rawPage, limit: rawLimit });
+    res.json({ success: true, data: { users: data }, total, page: rawPage, limit: rawLimit });
   } catch (err) {
     logger.error("GET /admin/users — failed to list users", { err });
     res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
   }
 });
 
+/**
+ * PATCH /api/admin/users/:id
+ * Met à jour isActive (ban / unban) d'un utilisateur.
+ */
+router.patch("/users/:id", async (req: Request, res: Response): Promise<void> => {
+  const { isActive } = req.body as { isActive?: boolean };
+
+  if (typeof isActive !== "boolean") {
+    res.status(400).json({ success: false, error: "INVALID_BODY" });
+    return;
+  }
+
+  try {
+    const repo = AppDataSource.getRepository(User);
+    const user = await repo.findOne({ where: { id: req.params.id } });
+
+    if (!user) {
+      res.status(404).json({ success: false, error: "NOT_FOUND" });
+      return;
+    }
+
+    user.isActive = isActive;
+    await repo.save(user);
+    res.json({ success: true, data: { userId: user.id, isActive: user.isActive } });
+  } catch (err) {
+    logger.error("PATCH /admin/users/:id — failed to update user", { err, id: req.params.id });
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
 /**
  * PATCH /api/admin/users/:id/roles
  * Assigne des rôles à un utilisateur (remplace les rôles existants).
@@ -332,6 +362,28 @@ router.patch("/users/:id/roles", async (req: Request, res: Response): Promise<vo
   }
 });
 
+// ---------------------------------------------------------------------------
+// STATS (super_admin)
+// ---------------------------------------------------------------------------
+
+/**
+ * GET /api/admin/stats
+ * Métriques globales de la plateforme.
+ */
+router.get("/stats", async (_req: Request, res: Response): Promise<void> => {
+  try {
+    const [totalUsers, totalVideos, activeSubscriptions] = await Promise.all([
+      AppDataSource.getRepository(User).count(),
+      AppDataSource.getRepository(Video).count({ where: { isPublished: true } }),
+      AppDataSource.getRepository(UserSubscription).count({ where: { status: "active" } }),
+    ]);
+    res.json({ success: true, data: { totalUsers, totalVideos, activeSubscriptions } });
+  } catch (err) {
+    logger.error("GET /admin/stats — failed", { err });
+    res.status(500).json({ success: false, error: "INTERNAL_ERROR" });
+  }
+});
+
 // ---------------------------------------------------------------------------
 // SUBSCRIPTION PLANS
 // ---------------------------------------------------------------------------
diff --git a/frontend/src/pages/AdminPage.tsx b/frontend/src/pages/AdminPage.tsx
index e57c965..d671aec 100644
--- a/frontend/src/pages/AdminPage.tsx
+++ b/frontend/src/pages/AdminPage.tsx
@@ -41,21 +41,32 @@ interface AdminUser {
   } | null;
 }
 
+interface Stats {
+  totalUsers: number;
+  totalVideos: number;
+  activeSubscriptions: number;
+}
+
 // ── Tabs ─────────────────────────────────────────────────────────────────────
 
-type Tab = 'videos' | 'users' | 'plans';
+type Tab = 'videos' | 'users' | 'plans' | 'system';
 
 export default function AdminPage() {
   const { user, loading: authLoading } = useAuthContext();
+  const isSuperAdmin = user?.roles?.includes('super_admin') ?? false;
   const [tab, setTab] = useState<Tab>('videos');
 
   if (authLoading) return null;
   if (!user?.roles?.some((r) => r === 'admin' || r === 'super_admin')) return <Navigate to="/" replace />;
 
+  const tabs: Tab[] = isSuperAdmin
+    ? ['videos', 'users', 'plans', 'system']
+    : ['videos', 'users', 'plans'];
+
   return (
     <div className="flex flex-col gap-6">
       <div className="flex items-center gap-1 border-b border-od-border pb-4">
-        {(['videos', 'users', 'plans'] as Tab[]).map((t) => (
+        {tabs.map((t) => (
           <button
             key={t}
             onClick={() => setTab(t)}
@@ -71,8 +82,9 @@ export default function AdminPage() {
       </div>
 
       {tab === 'videos' && <VideosTab />}
-      {tab === 'users'  && <UsersTab />}
+      {tab === 'users'  && <UsersTab isSuperAdmin={isSuperAdmin} />}
       {tab === 'plans'  && <PlansTab />}
+      {tab === 'system' && isSuperAdmin && <SystemTab />}
     </div>
   );
 }
@@ -166,7 +178,6 @@ function VideosTab() {
   return (
     <div className="flex flex-col gap-6">
 
-      {/* Formulaire création */}
       <form onSubmit={handleCreate} className="flex flex-col gap-3 rounded border border-od-border bg-od-surface p-4">
         <p className="font-mono text-xs text-od-muted uppercase tracking-widest">Nouvelle vidéo</p>
 
@@ -219,8 +230,7 @@ function VideosTab() {
           <label className="flex items-center gap-2 text-sm text-od-muted">
             Niveau requis
             <input
-              type="number"
-              min={0}
+              type="number" min={0}
               value={form.requiredLevel}
               onChange={(e) => setForm((f) => ({ ...f, requiredLevel: parseInt(e.target.value) || 0 }))}
               className="w-16 rounded border border-od-border bg-od-bg px-2 py-1 text-sm text-od-text outline-none focus:border-od-accent"
@@ -246,7 +256,6 @@ function VideosTab() {
         </button>
       </form>
 
-      {/* Liste */}
       {loading ? (
         <div className="flex flex-col gap-2">
           {[...Array(3)].map((_, i) => <div key={i} className="h-12 rounded border border-od-border animate-pulse" />)}
@@ -289,7 +298,7 @@ function VideosTab() {
 
 // ── Users tab ────────────────────────────────────────────────────────────────
 
-function UsersTab() {
+function UsersTab({ isSuperAdmin }: { isSuperAdmin: boolean }) {
   const [users, setUsers] = useState<AdminUser[]>([]);
   const [plans, setPlans] = useState<Plan[]>([]);
   const [loading, setLoading] = useState(true);
@@ -299,6 +308,7 @@ function UsersTab() {
   const [selectedPlan, setSelectedPlan] = useState<Record<string, string>>({});
   const [assigningRole, setAssigningRole] = useState<string | null>(null);
   const [selectedRole, setSelectedRole] = useState<Record<string, string>>({});
+  const [togglingBan, setTogglingBan] = useState<string | null>(null);
 
   useEffect(() => {
     Promise.all([
@@ -325,6 +335,7 @@ function UsersTab() {
       });
       const r = await apiFetch<{ success: boolean; data: { users: AdminUser[] } }>('/admin/users');
       setUsers(r.data.users);
+      setSelectedPlan((s) => { const n = { ...s }; delete n[userId]; return n; });
     } catch {
       setActionError('Impossible d\'assigner le plan.');
     }
@@ -343,12 +354,28 @@ function UsersTab() {
       });
       const r = await apiFetch<{ success: boolean; data: { users: AdminUser[] } }>('/admin/users');
       setUsers(r.data.users);
+      setSelectedRole((s) => { const n = { ...s }; delete n[userId]; return n; });
     } catch {
       setActionError('Impossible d\'assigner le rôle.');
     }
     setAssigningRole(null);
   }
 
+  async function toggleBan(u: AdminUser) {
+    setTogglingBan(u.id);
+    setActionError(null);
+    try {
+      await apiFetch(`/admin/users/${u.id}`, {
+        method: 'PATCH',
+        body: JSON.stringify({ isActive: !u.isActive }),
+      });
+      setUsers((prev) => prev.map((x) => x.id === u.id ? { ...x, isActive: !u.isActive } : x));
+    } catch {
+      setActionError('Impossible de modifier le statut.');
+    }
+    setTogglingBan(null);
+  }
+
   if (loading) return (
     <div className="flex flex-col gap-2">
       {[...Array(3)].map((_, i) => <div key={i} className="h-20 rounded border border-od-border animate-pulse" />)}
@@ -357,14 +384,29 @@ function UsersTab() {
 
   if (error) return <p className="text-sm text-od-crit">{error}</p>;
 
+  // Rôles assignables selon le niveau du current user
+  const assignableRoles = isSuperAdmin
+    ? ['user', 'moderator', 'admin', 'super_admin']
+    : ['user', 'moderator'];
+
   return (
     <div className="flex flex-col gap-2">
       {actionError && <p className="text-xs text-od-crit">{actionError}</p>}
       {users.map((u) => (
-        <div key={u.id} className="flex flex-col gap-2 rounded border border-od-border bg-od-surface px-4 py-3">
+        <div
+          key={u.id}
+          className={`flex flex-col gap-2 rounded border bg-od-surface px-4 py-3 ${
+            u.isActive ? 'border-od-border' : 'border-od-crit/40 opacity-60'
+          }`}
+        >
           <div className="flex items-start justify-between gap-2">
             <div>
-              <p className="text-sm font-medium text-od-text">{u.nickname}</p>
+              <p className="text-sm font-medium text-od-text">
+                {u.nickname}
+                {!u.isActive && (
+                  <span className="ml-2 font-mono text-xs text-od-crit">banni</span>
+                )}
+              </p>
               <p className="font-mono text-xs text-od-muted">{u.email ?? '—'}</p>
             </div>
             <div className="flex flex-col items-end gap-1">
@@ -382,11 +424,11 @@ function UsersTab() {
             </div>
           </div>
 
-          <div className="flex items-center gap-2">
+          <div className="flex flex-wrap items-center gap-2">
             <select
               value={selectedPlan[u.id] ?? ''}
               onChange={(e) => setSelectedPlan((s) => ({ ...s, [u.id]: e.target.value }))}
-              className="flex-1 rounded border border-od-border bg-od-bg px-2 py-1 text-xs text-od-text outline-none focus:border-od-accent"
+              className="flex-1 min-w-0 rounded border border-od-border bg-od-bg px-2 py-1 text-xs text-od-text outline-none focus:border-od-accent"
             >
               <option value="">— Plan —</option>
               {plans.filter((p) => p.isActive).map((p) => (
@@ -406,9 +448,7 @@ function UsersTab() {
               className="rounded border border-od-border bg-od-bg px-2 py-1 text-xs text-od-text outline-none focus:border-od-accent"
             >
               <option value="">— Rôle —</option>
-              <option value="user">user</option>
-              <option value="admin">admin</option>
-              <option value="super_admin">super_admin</option>
+              {assignableRoles.map((r) => <option key={r} value={r}>{r}</option>)}
             </select>
             <button
               disabled={!selectedRole[u.id] || assigningRole === u.id}
@@ -417,6 +457,17 @@ function UsersTab() {
             >
               {assigningRole === u.id ? '…' : 'Rôle'}
             </button>
+            <button
+              disabled={togglingBan === u.id}
+              onClick={() => toggleBan(u)}
+              className={`rounded border px-3 py-1 font-mono text-xs transition-colors disabled:opacity-40 ${
+                u.isActive
+                  ? 'border-od-border text-od-muted hover:border-od-crit hover:text-od-crit'
+                  : 'border-od-crit text-od-crit hover:bg-od-crit hover:text-od-bg'
+              }`}
+            >
+              {togglingBan === u.id ? '…' : u.isActive ? 'Bannir' : 'Débannir'}
+            </button>
           </div>
         </div>
       ))}
@@ -559,3 +610,51 @@ function PlansTab() {
     </div>
   );
 }
+
+// ── System tab (super_admin only) ─────────────────────────────────────────────
+
+function SystemTab() {
+  const [stats, setStats] = useState<Stats | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState(false);
+
+  useEffect(() => {
+    apiFetch<{ success: boolean; data: Stats }>('/admin/stats')
+      .then((r) => setStats(r.data))
+      .catch(() => setError(true))
+      .finally(() => setLoading(false));
+  }, []);
+
+  return (
+    <div className="flex flex-col gap-6">
+      <p className="font-mono text-xs text-od-muted uppercase tracking-widest">Métriques plateforme</p>
+
+      {loading && (
+        <div className="grid gap-4 sm:grid-cols-3">
+          {[...Array(3)].map((_, i) => (
+            <div key={i} className="h-20 rounded border border-od-border animate-pulse" />
+          ))}
+        </div>
+      )}
+
+      {error && <p className="text-sm text-od-crit">Impossible de charger les stats.</p>}
+
+      {stats && (
+        <div className="grid gap-4 sm:grid-cols-3">
+          <StatCard label="Utilisateurs" value={stats.totalUsers} />
+          <StatCard label="Vidéos publiées" value={stats.totalVideos} />
+          <StatCard label="Abonnements actifs" value={stats.activeSubscriptions} />
+        </div>
+      )}
+    </div>
+  );
+}
+
+function StatCard({ label, value }: { label: string; value: number }) {
+  return (
+    <div className="flex flex-col gap-1 rounded border border-od-border bg-od-surface p-4">
+      <p className="font-mono text-xs text-od-muted uppercase tracking-widest">{label}</p>
+      <p className="text-2xl font-semibold text-od-accent">{value}</p>
+    </div>
+  );
+}