diff --git a/frontend/src/app/(admin)/admin/contenus/page.tsx b/frontend/src/app/(admin)/admin/contenus/page.tsx
index a103f3b..00e6ef1 100644
--- a/frontend/src/app/(admin)/admin/contenus/page.tsx
+++ b/frontend/src/app/(admin)/admin/contenus/page.tsx
@@ -6,6 +6,7 @@ import type { Feed } from '@/types';
 import Button from '@/components/ui/Button';
 import Input from '@/components/ui/Input';
 import Modal from '@/components/ui/Modal';
+import ConfirmDialog from '@/components/ui/ConfirmDialog';
 import toast from 'react-hot-toast';
 
 export default function AdminContenusPage() {
@@ -14,6 +15,7 @@ export default function AdminContenusPage() {
   const [modalOpen, setModalOpen] = useState(false);
   const [editingFeed, setEditingFeed] = useState<Feed | null>(null);
   const [formLoading, setFormLoading] = useState(false);
+  const [deleteId, setDeleteId] = useState<number | null>(null);
   const [form, setForm] = useState({
     titre: '',
     contenu: '',
@@ -74,14 +76,16 @@ export default function AdminContenusPage() {
     }
   };
 
-  const handleDelete = async (id: number) => {
-    if (!confirm('Supprimer cet article ?')) return;
+  const confirmDelete = async () => {
+    if (deleteId === null) return;
     try {
-      await api.delete(`/admin/feeds/${id}`);
+      await api.delete(`/admin/feeds/${deleteId}`);
       await fetchFeeds();
       toast.success('Article supprimé');
     } catch {
       toast.error('Erreur lors de la suppression');
+    } finally {
+      setDeleteId(null);
     }
   };
 
@@ -152,7 +156,7 @@ export default function AdminContenusPage() {
                       <li>
                         <button
                           type="button"
-                          onClick={() => handleDelete(feed.id)}
+                          onClick={() => setDeleteId(feed.id)}
                           className="fr-btn fr-btn--sm fr-btn--tertiary fr-btn--icon-left fr-icon-delete-line"
                           title="Supprimer"
                         >
@@ -238,6 +242,16 @@ export default function AdminContenusPage() {
           </ul>
         </form>
       </Modal>
+
+      <ConfirmDialog
+        isOpen={deleteId !== null}
+        title="Supprimer l'article"
+        message="Cet article sera supprimé définitivement. Cette action est irréversible."
+        confirmLabel="Supprimer"
+        destructive
+        onConfirm={confirmDelete}
+        onClose={() => setDeleteId(null)}
+      />
     </div>
   );
 }
diff --git a/frontend/src/app/(admin)/admin/emotions/page.tsx b/frontend/src/app/(admin)/admin/emotions/page.tsx
index 50a80a4..7baf6f6 100644
--- a/frontend/src/app/(admin)/admin/emotions/page.tsx
+++ b/frontend/src/app/(admin)/admin/emotions/page.tsx
@@ -6,6 +6,7 @@ import type { Emotion } from '@/types';
 import Button from '@/components/ui/Button';
 import Input from '@/components/ui/Input';
 import Modal from '@/components/ui/Modal';
+import ConfirmDialog from '@/components/ui/ConfirmDialog';
 import toast from 'react-hot-toast';
 
 export default function AdminEmotionsPage() {
@@ -14,6 +15,7 @@ export default function AdminEmotionsPage() {
   const [modalOpen, setModalOpen] = useState(false);
   const [editingEmotion, setEditingEmotion] = useState<Emotion | null>(null);
   const [formLoading, setFormLoading] = useState(false);
+  const [deleteId, setDeleteId] = useState<number | null>(null);
   const [form, setForm] = useState({
     nom: '',
     couleur: '#fce117',
@@ -86,14 +88,18 @@ export default function AdminEmotionsPage() {
     }
   };
 
-  const handleDelete = async (id: number) => {
-    if (!confirm('Supprimer cette émotion ?')) return;
+  const handleDelete = (id: number) => setDeleteId(id);
+
+  const confirmDelete = async () => {
+    if (deleteId === null) return;
     try {
-      await api.delete(`/admin/emotions/${id}`);
+      await api.delete(`/admin/emotions/${deleteId}`);
       await fetchEmotions();
       toast.success('Émotion supprimée');
     } catch {
       toast.error('Erreur lors de la suppression');
+    } finally {
+      setDeleteId(null);
     }
   };
 
@@ -253,6 +259,16 @@ export default function AdminEmotionsPage() {
           </ul>
         </form>
       </Modal>
+
+      <ConfirmDialog
+        isOpen={deleteId !== null}
+        title="Supprimer l'émotion"
+        message="Cette émotion (et ses sous-émotions) sera supprimée. Cette action est irréversible."
+        confirmLabel="Supprimer"
+        destructive
+        onConfirm={confirmDelete}
+        onClose={() => setDeleteId(null)}
+      />
     </div>
   );
 }
diff --git a/frontend/src/app/(admin)/admin/utilisateurs/page.tsx b/frontend/src/app/(admin)/admin/utilisateurs/page.tsx
index e1439a5..f9ed562 100644
--- a/frontend/src/app/(admin)/admin/utilisateurs/page.tsx
+++ b/frontend/src/app/(admin)/admin/utilisateurs/page.tsx
@@ -6,6 +6,7 @@ import type { Utilisateur } from '@/types';
 import Button from '@/components/ui/Button';
 import Input from '@/components/ui/Input';
 import Modal from '@/components/ui/Modal';
+import ConfirmDialog from '@/components/ui/ConfirmDialog';
 import toast from 'react-hot-toast';
 
 export default function AdminUtilisateursPage() {
@@ -14,6 +15,7 @@ export default function AdminUtilisateursPage() {
   const [search, setSearch] = useState('');
   const [createModalOpen, setCreateModalOpen] = useState(false);
   const [formLoading, setFormLoading] = useState(false);
+  const [deleteId, setDeleteId] = useState<number | null>(null);
   const [newUser, setNewUser] = useState({
     nom: '', prenom: '', email: '', password: '', password_confirmation: '', role_id: 2,
   });
@@ -41,14 +43,16 @@ export default function AdminUtilisateursPage() {
     }
   };
 
-  const handleDelete = async (id: number) => {
-    if (!confirm('Supprimer cet utilisateur ?')) return;
+  const confirmDelete = async () => {
+    if (deleteId === null) return;
     try {
-      await api.delete(`/admin/utilisateurs/${id}`);
+      await api.delete(`/admin/utilisateurs/${deleteId}`);
       await fetchUsers();
       toast.success('Utilisateur supprimé');
     } catch {
       toast.error('Erreur lors de la suppression');
+    } finally {
+      setDeleteId(null);
     }
   };
 
@@ -170,7 +174,7 @@ export default function AdminUtilisateursPage() {
                       <li>
                         <button
                           type="button"
-                          onClick={() => handleDelete(user.id)}
+                          onClick={() => setDeleteId(user.id)}
                           className="fr-btn fr-btn--sm fr-btn--tertiary fr-btn--icon-left fr-icon-delete-line"
                           title="Supprimer"
                         >
@@ -222,6 +226,16 @@ export default function AdminUtilisateursPage() {
           </ul>
         </form>
       </Modal>
+
+      <ConfirmDialog
+        isOpen={deleteId !== null}
+        title="Supprimer l'utilisateur"
+        message="Cet utilisateur sera supprimé. Cette action est irréversible."
+        confirmLabel="Supprimer"
+        destructive
+        onConfirm={confirmDelete}
+        onClose={() => setDeleteId(null)}
+      />
     </div>
   );
 }
diff --git a/frontend/src/components/features/EmotionChart.tsx b/frontend/src/components/features/EmotionChart.tsx
index 800c199..1f3c855 100644
--- a/frontend/src/components/features/EmotionChart.tsx
+++ b/frontend/src/components/features/EmotionChart.tsx
@@ -60,11 +60,13 @@ export default function EmotionChart({ data, type = 'repartition' }: EmotionChar
                 [`${value} saisies`, name]
               }
               contentStyle={{
-                backgroundColor: 'rgba(255,255,255,0.95)',
-                border: 'none',
-                borderRadius: '12px',
-                boxShadow: '0 4px 12px rgba(0,0,0,0.1)',
+                backgroundColor: 'var(--background-overlap-grey)',
+                border: '1px solid var(--border-default-grey)',
+                borderRadius: '0.25rem',
+                color: 'var(--text-default-grey)',
               }}
+              labelStyle={{ color: 'var(--text-default-grey)' }}
+              itemStyle={{ color: 'var(--text-default-grey)' }}
             />
           </PieChart>
         </ResponsiveContainer>
@@ -94,11 +96,13 @@ export default function EmotionChart({ data, type = 'repartition' }: EmotionChar
             <YAxis tick={{ fontSize: 12 }} allowDecimals={false} />
             <Tooltip
               contentStyle={{
-                backgroundColor: 'rgba(255,255,255,0.95)',
-                border: 'none',
-                borderRadius: '12px',
-                boxShadow: '0 4px 12px rgba(0,0,0,0.1)',
+                backgroundColor: 'var(--background-overlap-grey)',
+                border: '1px solid var(--border-default-grey)',
+                borderRadius: '0.25rem',
+                color: 'var(--text-default-grey)',
               }}
+              labelStyle={{ color: 'var(--text-default-grey)' }}
+              itemStyle={{ color: 'var(--text-default-grey)' }}
             />
             <Legend />
             {data.evolution.emotions.map((emotion) => (
@@ -134,11 +138,13 @@ export default function EmotionChart({ data, type = 'repartition' }: EmotionChar
             <YAxis domain={[0, 10]} tick={{ fontSize: 12 }} />
             <Tooltip
               contentStyle={{
-                backgroundColor: 'rgba(255,255,255,0.95)',
-                border: 'none',
-                borderRadius: '12px',
-                boxShadow: '0 4px 12px rgba(0,0,0,0.1)',
+                backgroundColor: 'var(--background-overlap-grey)',
+                border: '1px solid var(--border-default-grey)',
+                borderRadius: '0.25rem',
+                color: 'var(--text-default-grey)',
               }}
+              labelStyle={{ color: 'var(--text-default-grey)' }}
+              itemStyle={{ color: 'var(--text-default-grey)' }}
               formatter={(value: ValueType | undefined) => [`${Number(value).toFixed(1)}`, 'Intensité moyenne']}
             />
             <Bar dataKey="intensite" fill="#000091" radius={[6, 6, 0, 0]} />
diff --git a/frontend/src/components/ui/ThemeToggle.tsx b/frontend/src/components/ui/ThemeToggle.tsx
deleted file mode 100644
index 385aa68..0000000
--- a/frontend/src/components/ui/ThemeToggle.tsx
+++ /dev/null
@@ -1,51 +0,0 @@
-"use client";
-
-import React from "react";
-
-type Scheme = "light" | "dark";
-
-export default function ThemeToggle() {
-  const [mounted, setMounted] = React.useState(false);
-  const [scheme, setScheme] = React.useState<Scheme>("light");
-
-  React.useEffect(() => {
-    setMounted(true);
-    const current = document.documentElement.getAttribute("data-fr-theme");
-    setScheme(current === "dark" ? "dark" : "light");
-  }, []);
-
-  const toggle = () => {
-    const next: Scheme = scheme === "dark" ? "light" : "dark";
-    document.documentElement.setAttribute("data-fr-theme", next);
-    document.documentElement.setAttribute("data-fr-scheme", next);
-    setScheme(next);
-  };
-
-  if (!mounted) {
-    return (
-      <button
-        type="button"
-        className="fr-btn fr-btn--tertiary fr-btn--icon-left fr-icon-theme-fill"
-        aria-label="Changer le thème"
-      >
-        Thème
-      </button>
-    );
-  }
-
-  return (
-    <button
-      type="button"
-      onClick={toggle}
-      className={`fr-btn fr-btn--tertiary fr-btn--icon-left ${
-        scheme === "dark" ? "fr-icon-sun-fill" : "fr-icon-moon-fill"
-      }`}
-      aria-label={
-        scheme === "dark" ? "Passer en mode clair" : "Passer en mode sombre"
-      }
-      title={scheme === "dark" ? "Passer en mode clair" : "Passer en mode sombre"}
-    >
-      {scheme === "dark" ? "Mode clair" : "Mode sombre"}
-    </button>
-  );
-}