diff --git a/client/src/App.tsx b/client/src/App.tsx
index 9d83cf5..3d20637 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -7,12 +7,15 @@ import NotFound from "@/pages/NotFound";
 import { Route, Switch } from "wouter";
 import ErrorBoundary from "./components/ErrorBoundary";
 import { ThemeProvider } from "./contexts/ThemeContext";
+import { ParametresProvider } from "./contexts/ParametresContext";
 import Home from "./pages/Home";
+import Parametres from "./pages/Parametres";
 
 function Router() {
   return (
     <Switch>
       <Route path={"/"} component={Home} />
+      <Route path={"/parametres"} component={Parametres} />
       <Route path={"/404"} component={NotFound} />
       <Route component={NotFound} />
     </Switch>
@@ -23,10 +26,12 @@ function App() {
   return (
     <ErrorBoundary>
       <ThemeProvider defaultTheme="light">
-        <TooltipProvider>
-          <Toaster />
-          <Router />
-        </TooltipProvider>
+        <ParametresProvider>
+          <TooltipProvider>
+            <Toaster />
+            <Router />
+          </TooltipProvider>
+        </ParametresProvider>
       </ThemeProvider>
     </ErrorBoundary>
   );
diff --git a/client/src/contexts/ParametresContext.tsx b/client/src/contexts/ParametresContext.tsx
new file mode 100644
index 0000000..017decf
--- /dev/null
+++ b/client/src/contexts/ParametresContext.tsx
@@ -0,0 +1,80 @@
+// ParametresContext.tsx — Contexte global des paramètres de calcul
+// Persiste les valeurs dans localStorage pour les conserver entre sessions
+
+import { createContext, useContext, useState, useCallback, type ReactNode } from 'react';
+
+export interface Parametres {
+  seuilFixesAns: number;
+  seuilPortablesAns: number;
+  coutFixe: number;
+  coutPortable: number;
+}
+
+const DEFAULTS: Parametres = {
+  seuilFixesAns: 5,
+  seuilPortablesAns: 4,
+  coutFixe: 450,
+  coutPortable: 1000,
+};
+
+const STORAGE_KEY = 'itinova_budget_parametres';
+
+function loadFromStorage(): Parametres {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY);
+    if (!raw) return DEFAULTS;
+    const parsed = JSON.parse(raw) as Partial<Parametres>;
+    return {
+      seuilFixesAns: typeof parsed.seuilFixesAns === 'number' ? parsed.seuilFixesAns : DEFAULTS.seuilFixesAns,
+      seuilPortablesAns: typeof parsed.seuilPortablesAns === 'number' ? parsed.seuilPortablesAns : DEFAULTS.seuilPortablesAns,
+      coutFixe: typeof parsed.coutFixe === 'number' ? parsed.coutFixe : DEFAULTS.coutFixe,
+      coutPortable: typeof parsed.coutPortable === 'number' ? parsed.coutPortable : DEFAULTS.coutPortable,
+    };
+  } catch {
+    return DEFAULTS;
+  }
+}
+
+interface ParametresContextType {
+  parametres: Parametres;
+  setParametres: (p: Parametres) => void;
+  resetParametres: () => void;
+}
+
+const ParametresContext = createContext<ParametresContextType | null>(null);
+
+export function ParametresProvider({ children }: { children: ReactNode }) {
+  const [parametres, setParametresState] = useState<Parametres>(loadFromStorage);
+
+  const setParametres = useCallback((p: Parametres) => {
+    setParametresState(p);
+    try {
+      localStorage.setItem(STORAGE_KEY, JSON.stringify(p));
+    } catch {
+      // ignore
+    }
+  }, []);
+
+  const resetParametres = useCallback(() => {
+    setParametresState(DEFAULTS);
+    try {
+      localStorage.removeItem(STORAGE_KEY);
+    } catch {
+      // ignore
+    }
+  }, []);
+
+  return (
+    <ParametresContext.Provider value={{ parametres, setParametres, resetParametres }}>
+      {children}
+    </ParametresContext.Provider>
+  );
+}
+
+export function useParametres() {
+  const ctx = useContext(ParametresContext);
+  if (!ctx) throw new Error('useParametres must be used within ParametresProvider');
+  return ctx;
+}
+
+export { DEFAULTS as PARAMETRES_DEFAULTS };
diff --git a/client/src/hooks/useBudgetData.ts b/client/src/hooks/useBudgetData.ts
index 7b0de1c..791f894 100644
--- a/client/src/hooks/useBudgetData.ts
+++ b/client/src/hooks/useBudgetData.ts
@@ -1,20 +1,102 @@
-// Hook pour charger et gérer les données budget
+// Hook pour charger et gérer les données budget avec recalcul dynamique
 // Design: Corporate Modernism — Itinova Budget SI 2027
 
 import { useState, useMemo } from 'react';
 import budgetRaw from '../data_budget.json';
-import type { BudgetData, Etablissement, SortField, SortOrder, FilterType } from '../types/budget';
+import type { BudgetData, Etablissement, EtablissementStats, SortField, SortOrder, FilterType } from '../types/budget';
+import { useParametres } from '../contexts/ParametresContext';
 
 const budgetData = budgetRaw as BudgetData;
 
+// Date de référence fixe : 01/01/2027
+const DATE_REFERENCE = new Date('2027-01-01');
+
+/**
+ * Recalcule les stats d'un établissement selon les paramètres courants.
+ * On repart des données brutes (age_ans stocké dans chaque Materiel)
+ * et on applique les nouveaux seuils.
+ */
+function recalculerStats(
+  etab: Etablissement,
+  seuilFixesAns: number,
+  seuilPortablesAns: number,
+  coutFixe: number,
+  coutPortable: number
+): EtablissementStats {
+  const fixes = etab.fixes ?? [];
+  const portables = etab.portables ?? [];
+
+  const nbFixesTotal = fixes.length;
+  const nbPortablesTotal = portables.length;
+
+  // Renouveler si age_ans connu ET >= seuil
+  const nbFixesRenouveler = fixes.filter(
+    (f) => f.age_ans !== null && f.age_ans >= seuilFixesAns
+  ).length;
+  const nbPortablesRenouveler = portables.filter(
+    (p) => p.age_ans !== null && p.age_ans >= seuilPortablesAns
+  ).length;
+
+  const nbFixesSansDate = fixes.filter((f) => f.age_ans === null).length;
+  const nbPortablesSansDate = portables.filter((p) => p.age_ans === null).length;
+
+  const budgetFixes = nbFixesRenouveler * coutFixe;
+  const budgetPortables = nbPortablesRenouveler * coutPortable;
+  const budgetTotal = budgetFixes + budgetPortables;
+
+  return {
+    nb_fixes_total: nbFixesTotal,
+    nb_portables_total: nbPortablesTotal,
+    nb_fixes_renouveler: nbFixesRenouveler,
+    nb_portables_renouveler: nbPortablesRenouveler,
+    nb_fixes_sans_date: nbFixesSansDate,
+    nb_portables_sans_date: nbPortablesSansDate,
+    budget_fixes: budgetFixes,
+    budget_portables: budgetPortables,
+    budget_total: budgetTotal,
+  };
+}
+
 export function useBudgetData() {
+  const { parametres } = useParametres();
   const [search, setSearch] = useState('');
   const [sortField, setSortField] = useState<SortField>('budget_total');
   const [sortOrder, setSortOrder] = useState<SortOrder>('desc');
   const [filterType, setFilterType] = useState<FilterType>('all');
 
+  // Recalcul de tous les établissements selon les paramètres courants
+  const etablissementsRecalcules = useMemo<Etablissement[]>(() => {
+    return budgetData.etablissements.map((etab) => ({
+      ...etab,
+      stats: recalculerStats(
+        etab,
+        parametres.seuilFixesAns,
+        parametres.seuilPortablesAns,
+        parametres.coutFixe,
+        parametres.coutPortable
+      ),
+    }));
+  }, [parametres]);
+
+  // Méta recalculée (totaux globaux)
+  const metaRecalculee = useMemo(() => {
+    const totalFixesR = etablissementsRecalcules.reduce((s, e) => s + e.stats.nb_fixes_renouveler, 0);
+    const totalPortablesR = etablissementsRecalcules.reduce((s, e) => s + e.stats.nb_portables_renouveler, 0);
+    const budgetGlobal = etablissementsRecalcules.reduce((s, e) => s + e.stats.budget_total, 0);
+    return {
+      ...budgetData.meta,
+      seuil_fixes_ans: parametres.seuilFixesAns,
+      seuil_portables_ans: parametres.seuilPortablesAns,
+      cout_fixe: parametres.coutFixe,
+      cout_portable: parametres.coutPortable,
+      total_fixes_renouveler: totalFixesR,
+      total_portables_renouveler: totalPortablesR,
+      budget_global: budgetGlobal,
+    };
+  }, [etablissementsRecalcules, parametres]);
+
   const filteredAndSorted = useMemo(() => {
-    let list: Etablissement[] = [...budgetData.etablissements];
+    let list: Etablissement[] = [...etablissementsRecalcules];
 
     // Filtre par recherche
     if (search.trim()) {
@@ -76,7 +158,7 @@ export function useBudgetData() {
     });
 
     return list;
-  }, [search, sortField, sortOrder, filterType]);
+  }, [etablissementsRecalcules, search, sortField, sortOrder, filterType]);
 
   const toggleSort = (field: SortField) => {
     if (sortField === field) {
@@ -88,7 +170,7 @@ export function useBudgetData() {
   };
 
   return {
-    meta: budgetData.meta,
+    meta: metaRecalculee,
     etablissements: filteredAndSorted,
     totalEtablissements: budgetData.etablissements.length,
     search,
diff --git a/client/src/pages/Home.tsx b/client/src/pages/Home.tsx
index cbef1ec..1fb6d85 100644
--- a/client/src/pages/Home.tsx
+++ b/client/src/pages/Home.tsx
@@ -2,6 +2,7 @@
 // Design: Corporate Modernism — Sidebar bleu marine + grille de cards + vue liste
 
 import { useState } from 'react';
+import { useLocation } from 'wouter';
 import {
   Building2,
   Monitor,
@@ -17,6 +18,7 @@ import {
   ChevronDown,
   LayoutGrid,
   List,
+  Settings,
 } from 'lucide-react';
 import { useBudgetData } from '../hooks/useBudgetData';
 import { formatEuros, formatNumber } from '../lib/format';
@@ -42,6 +44,7 @@ export default function Home() {
     setFilterType,
   } = useBudgetData();
 
+  const [, navigate] = useLocation();
   const [selectedEtab, setSelectedEtab] = useState<Etablissement | null>(null);
   const [sidebarOpen, setSidebarOpen] = useState(true);
   const [viewMode, setViewMode] = useState<ViewMode>('grid');
@@ -90,6 +93,13 @@ export default function Home() {
             <Building2 className="w-4 h-4 flex-shrink-0" />
             {sidebarOpen && <span className="text-sm font-medium">Établissements</span>}
           </div>
+          <button
+            onClick={() => navigate('/parametres')}
+            className="w-full flex items-center gap-3 px-3 py-2.5 rounded-lg text-white/60 hover:bg-white/10 hover:text-white transition-colors"
+          >
+            <Settings className="w-4 h-4 flex-shrink-0" />
+            {sidebarOpen && <span className="text-sm font-medium">Paramètres</span>}
+          </button>
         </nav>
 
         {/* Infos calcul */}
diff --git a/client/src/pages/Parametres.tsx b/client/src/pages/Parametres.tsx
new file mode 100644
index 0000000..263b45f
--- /dev/null
+++ b/client/src/pages/Parametres.tsx
@@ -0,0 +1,406 @@
+// Parametres.tsx — Page de paramétrage du calcul de renouvellement
+// Design: Corporate Modernism — Itinova Budget SI 2027
+
+import { useState, useEffect } from 'react';
+import { useLocation } from 'wouter';
+import {
+  Settings,
+  Monitor,
+  Laptop,
+  Euro,
+  RotateCcw,
+  Save,
+  CheckCircle,
+  ChevronLeft,
+  Info,
+  BarChart3,
+  Building2,
+} from 'lucide-react';
+import { useParametres, PARAMETRES_DEFAULTS } from '../contexts/ParametresContext';
+import { formatEuros } from '../lib/format';
+import { toast } from 'sonner';
+
+interface FieldState {
+  seuilFixesAns: number;
+  seuilPortablesAns: number;
+  coutFixe: number;
+  coutPortable: number;
+}
+
+function SliderInput({
+  label,
+  icon: Icon,
+  value,
+  min,
+  max,
+  step,
+  unit,
+  description,
+  onChange,
+  accentClass,
+}: {
+  label: string;
+  icon: React.ElementType;
+  value: number;
+  min: number;
+  max: number;
+  step: number;
+  unit: string;
+  description: string;
+  onChange: (v: number) => void;
+  accentClass: string;
+}) {
+  return (
+    <div className="bg-card border border-border rounded-xl p-5 space-y-4">
+      <div className="flex items-start gap-3">
+        <div className={`w-10 h-10 rounded-lg flex items-center justify-center flex-shrink-0 ${accentClass}`}>
+          <Icon className="w-5 h-5" />
+        </div>
+        <div className="flex-1 min-w-0">
+          <p className="font-semibold text-foreground" style={{ fontFamily: 'Sora, sans-serif' }}>
+            {label}
+          </p>
+          <p className="text-sm text-muted-foreground mt-0.5">{description}</p>
+        </div>
+        <div className="flex-shrink-0 text-right">
+          <span className={`text-2xl font-bold tabular-nums ${accentClass.replace('bg-', 'text-').replace('/10', '')}`}>
+            {value}
+          </span>
+          <span className="text-sm text-muted-foreground ml-1">{unit}</span>
+        </div>
+      </div>
+
+      {/* Slider */}
+      <div className="space-y-2">
+        <input
+          type="range"
+          min={min}
+          max={max}
+          step={step}
+          value={value}
+          onChange={(e) => onChange(Number(e.target.value))}
+          className="w-full h-2 rounded-full appearance-none cursor-pointer accent-primary bg-muted"
+        />
+        <div className="flex justify-between text-xs text-muted-foreground">
+          <span>{min} {unit}</span>
+          <span>{max} {unit}</span>
+        </div>
+      </div>
+
+      {/* Input numérique direct */}
+      <div className="flex items-center gap-2">
+        <label className="text-sm text-muted-foreground flex-shrink-0">Valeur exacte :</label>
+        <input
+          type="number"
+          min={min}
+          max={max}
+          step={step}
+          value={value}
+          onChange={(e) => {
+            const v = Number(e.target.value);
+            if (!isNaN(v) && v >= min && v <= max) onChange(v);
+          }}
+          className="w-24 px-3 py-1.5 text-sm border border-border rounded-lg bg-muted/50 focus:outline-none focus:ring-2 focus:ring-primary/30 focus:border-primary tabular-nums"
+        />
+        <span className="text-sm text-muted-foreground">{unit}</span>
+      </div>
+    </div>
+  );
+}
+
+export default function Parametres() {
+  const [, navigate] = useLocation();
+  const { parametres, setParametres, resetParametres } = useParametres();
+  const [draft, setDraft] = useState<FieldState>({ ...parametres });
+  const [saved, setSaved] = useState(false);
+
+  // Sync si les paramètres changent depuis l'extérieur
+  useEffect(() => {
+    setDraft({ ...parametres });
+  }, [parametres]);
+
+  const hasChanges =
+    draft.seuilFixesAns !== parametres.seuilFixesAns ||
+    draft.seuilPortablesAns !== parametres.seuilPortablesAns ||
+    draft.coutFixe !== parametres.coutFixe ||
+    draft.coutPortable !== parametres.coutPortable;
+
+  const handleSave = () => {
+    setParametres(draft);
+    setSaved(true);
+    toast.success('Paramètres enregistrés', {
+      description: 'Les budgets ont été recalculés avec les nouveaux seuils.',
+    });
+    setTimeout(() => setSaved(false), 2500);
+  };
+
+  const handleReset = () => {
+    setDraft({ ...PARAMETRES_DEFAULTS });
+    resetParametres();
+    toast.info('Paramètres réinitialisés', {
+      description: 'Les valeurs par défaut ont été restaurées.',
+    });
+  };
+
+  const update = (key: keyof FieldState) => (v: number) => {
+    setDraft((d) => ({ ...d, [key]: v }));
+  };
+
+  return (
+    <div className="min-h-screen flex bg-background">
+      {/* Sidebar identique à Home */}
+      <aside
+        className="w-64 flex-shrink-0 bg-[oklch(0.22_0.06_240)] text-white flex flex-col"
+        style={{ minHeight: '100vh' }}
+      >
+        <div className="px-4 py-5 border-b border-white/10">
+          <div className="flex items-center gap-3">
+            <div className="w-8 h-8 rounded-lg bg-primary flex items-center justify-center flex-shrink-0">
+              <BarChart3 className="w-4 h-4 text-white" />
+            </div>
+            <div className="min-w-0">
+              <p className="font-bold text-sm leading-tight" style={{ fontFamily: 'Sora, sans-serif' }}>
+                Budget SI 2027
+              </p>
+              <p className="text-[10px] text-white/50 mt-0.5">Itinova — Renouvellement</p>
+            </div>
+          </div>
+        </div>
+
+        <nav className="flex-1 px-3 py-4 space-y-1">
+          <button
+            onClick={() => navigate('/')}
+            className="w-full flex items-center gap-3 px-3 py-2.5 rounded-lg text-white/70 hover:bg-white/10 hover:text-white transition-colors"
+          >
+            <Building2 className="w-4 h-4 flex-shrink-0" />
+            <span className="text-sm font-medium">Établissements</span>
+          </button>
+          <div className="flex items-center gap-3 px-3 py-2.5 rounded-lg bg-white/10 text-white">
+            <Settings className="w-4 h-4 flex-shrink-0" />
+            <span className="text-sm font-medium">Paramètres</span>
+          </div>
+        </nav>
+
+        {/* Résumé des paramètres actifs */}
+        <div className="px-4 py-4 border-t border-white/10">
+          <p className="text-[10px] text-white/40 uppercase tracking-wider mb-2">Paramètres actifs</p>
+          <div className="space-y-1.5 text-xs text-white/70">
+            <div className="flex justify-between">
+              <span>Seuil fixes</span>
+              <span className="text-white font-medium">&gt; {parametres.seuilFixesAns} ans</span>
+            </div>
+            <div className="flex justify-between">
+              <span>Seuil portables</span>
+              <span className="text-white font-medium">&gt; {parametres.seuilPortablesAns} ans</span>
+            </div>
+            <div className="flex justify-between">
+              <span>Coût fixe</span>
+              <span className="text-white font-medium">{formatEuros(parametres.coutFixe)}</span>
+            </div>
+            <div className="flex justify-between">
+              <span>Coût portable</span>
+              <span className="text-white font-medium">{formatEuros(parametres.coutPortable)}</span>
+            </div>
+          </div>
+        </div>
+      </aside>
+
+      {/* Contenu principal */}
+      <main className="flex-1 flex flex-col min-w-0 overflow-hidden">
+        {/* En-tête */}
+        <header className="bg-card border-b border-border px-6 py-4 flex-shrink-0">
+          <div className="flex items-center justify-between">
+            <div className="flex items-center gap-3">
+              <button
+                onClick={() => navigate('/')}
+                className="p-2 rounded-lg hover:bg-muted transition-colors text-muted-foreground hover:text-foreground"
+                title="Retour aux établissements"
+              >
+                <ChevronLeft className="w-4 h-4" />
+              </button>
+              <div>
+                <h1 className="text-xl font-bold text-foreground" style={{ fontFamily: 'Sora, sans-serif' }}>
+                  Paramètres de calcul
+                </h1>
+                <p className="text-sm text-muted-foreground mt-0.5">
+                  Seuils de vétusté et coûts unitaires — Budget 2027
+                </p>
+              </div>
+            </div>
+            <div className="flex items-center gap-2">
+              <button
+                onClick={handleReset}
+                className="flex items-center gap-2 px-3 py-2 text-sm rounded-lg border border-border bg-card hover:bg-muted transition-colors text-muted-foreground"
+              >
+                <RotateCcw className="w-3.5 h-3.5" />
+                Réinitialiser
+              </button>
+              <button
+                onClick={handleSave}
+                disabled={!hasChanges}
+                className={`flex items-center gap-2 px-4 py-2 text-sm rounded-lg font-medium transition-all ${
+                  saved
+                    ? 'bg-emerald-600 text-white'
+                    : hasChanges
+                    ? 'bg-primary text-primary-foreground hover:bg-primary/90 shadow-sm'
+                    : 'bg-muted text-muted-foreground cursor-not-allowed'
+                }`}
+              >
+                {saved ? (
+                  <>
+                    <CheckCircle className="w-3.5 h-3.5" />
+                    Enregistré
+                  </>
+                ) : (
+                  <>
+                    <Save className="w-3.5 h-3.5" />
+                    Enregistrer
+                  </>
+                )}
+              </button>
+            </div>
+          </div>
+        </header>
+
+        {/* Contenu */}
+        <div className="flex-1 overflow-y-auto px-6 py-6">
+          <div className="max-w-2xl space-y-8">
+
+            {/* Bandeau info */}
+            <div className="flex items-start gap-3 bg-blue-50 border border-blue-200 rounded-xl px-4 py-3 text-sm text-blue-800">
+              <Info className="w-4 h-4 mt-0.5 flex-shrink-0 text-blue-500" />
+              <p>
+                Les modifications sont appliquées <strong>immédiatement</strong> après enregistrement.
+                Tous les budgets des 60 établissements sont recalculés automatiquement.
+                Les valeurs sont sauvegardées dans votre navigateur.
+              </p>
+            </div>
+
+            {/* Section vétusté */}
+            <section className="space-y-4">
+              <div className="flex items-center gap-2 pb-2 border-b border-border">
+                <Settings className="w-4 h-4 text-muted-foreground" />
+                <h2 className="font-semibold text-foreground" style={{ fontFamily: 'Sora, sans-serif' }}>
+                  Seuils de vétusté
+                </h2>
+              </div>
+              <p className="text-sm text-muted-foreground">
+                Un équipement est considéré à renouveler si son âge (calculé au 01/01/2027) est
+                <strong> supérieur ou égal</strong> au seuil défini ci-dessous.
+              </p>
+
+              <SliderInput
+                label="PC Fixes"
+                icon={Monitor}
+                value={draft.seuilFixesAns}
+                min={1}
+                max={15}
+                step={1}
+                unit="ans"
+                description="Âge minimum pour renouveler un PC de bureau"
+                onChange={update('seuilFixesAns')}
+                accentClass="bg-blue-100 text-blue-700"
+              />
+
+              <SliderInput
+                label="PC Portables"
+                icon={Laptop}
+                value={draft.seuilPortablesAns}
+                min={1}
+                max={15}
+                step={1}
+                unit="ans"
+                description="Âge minimum pour renouveler un PC portable"
+                onChange={update('seuilPortablesAns')}
+                accentClass="bg-orange-100 text-orange-700"
+              />
+            </section>
+
+            {/* Section coûts */}
+            <section className="space-y-4">
+              <div className="flex items-center gap-2 pb-2 border-b border-border">
+                <Euro className="w-4 h-4 text-muted-foreground" />
+                <h2 className="font-semibold text-foreground" style={{ fontFamily: 'Sora, sans-serif' }}>
+                  Coûts unitaires TTC
+                </h2>
+              </div>
+              <p className="text-sm text-muted-foreground">
+                Prix d'achat unitaire estimé utilisé pour le calcul du budget de renouvellement.
+              </p>
+
+              <SliderInput
+                label="Coût d'un PC Fixe"
+                icon={Monitor}
+                value={draft.coutFixe}
+                min={100}
+                max={2000}
+                step={50}
+                unit="€ TTC"
+                description="Prix unitaire estimé pour un PC de bureau neuf"
+                onChange={update('coutFixe')}
+                accentClass="bg-blue-100 text-blue-700"
+              />
+
+              <SliderInput
+                label="Coût d'un PC Portable"
+                icon={Laptop}
+                value={draft.coutPortable}
+                min={100}
+                max={3000}
+                step={50}
+                unit="€ TTC"
+                description="Prix unitaire estimé pour un PC portable neuf"
+                onChange={update('coutPortable')}
+                accentClass="bg-orange-100 text-orange-700"
+              />
+            </section>
+
+            {/* Aperçu de l'impact */}
+            <section className="space-y-4">
+              <div className="flex items-center gap-2 pb-2 border-b border-border">
+                <BarChart3 className="w-4 h-4 text-muted-foreground" />
+                <h2 className="font-semibold text-foreground" style={{ fontFamily: 'Sora, sans-serif' }}>
+                  Paramètres en cours d'édition
+                </h2>
+              </div>
+              <div className="grid grid-cols-2 gap-3">
+                {[
+                  { label: 'Seuil PC Fixes', value: `${draft.seuilFixesAns} ans`, changed: draft.seuilFixesAns !== parametres.seuilFixesAns },
+                  { label: 'Seuil PC Portables', value: `${draft.seuilPortablesAns} ans`, changed: draft.seuilPortablesAns !== parametres.seuilPortablesAns },
+                  { label: 'Coût fixe unitaire', value: formatEuros(draft.coutFixe), changed: draft.coutFixe !== parametres.coutFixe },
+                  { label: 'Coût portable unitaire', value: formatEuros(draft.coutPortable), changed: draft.coutPortable !== parametres.coutPortable },
+                ].map((item) => (
+                  <div
+                    key={item.label}
+                    className={`rounded-lg border px-4 py-3 transition-colors ${
+                      item.changed
+                        ? 'border-orange-300 bg-orange-50'
+                        : 'border-border bg-card'
+                    }`}
+                  >
+                    <p className="text-xs text-muted-foreground">{item.label}</p>
+                    <p className={`font-bold mt-0.5 ${item.changed ? 'text-orange-700' : 'text-foreground'}`}>
+                      {item.value}
+                      {item.changed && (
+                        <span className="ml-2 text-[10px] font-normal text-orange-500 uppercase tracking-wide">
+                          modifié
+                        </span>
+                      )}
+                    </p>
+                  </div>
+                ))}
+              </div>
+              {hasChanges && (
+                <p className="text-sm text-orange-600 flex items-center gap-1.5">
+                  <Info className="w-3.5 h-3.5" />
+                  Des modifications non enregistrées sont en attente. Cliquez sur <strong>Enregistrer</strong> pour les appliquer.
+                </p>
+              )}
+            </section>
+
+          </div>
+        </div>
+      </main>
+    </div>
+  );
+}