diff --git a/src/renderer/src/api/ors.ts b/src/renderer/src/api/ors.ts
index 2e254bd..23a9d4d 100644
--- a/src/renderer/src/api/ors.ts
+++ b/src/renderer/src/api/ors.ts
@@ -3,6 +3,13 @@ import type { TransportMode } from '../store/useAppStore'
 
 export const ISOCHRONE_COLORS = ['#4ade80', '#fbbf24', '#f87171', '#c084fc', '#60a5fa']
 
+// Valhalla costing profiles
+const COSTING_MAP: Record<TransportMode, string> = {
+  auto: 'auto',
+  bicycle: 'bicycle',
+  pedestrian: 'pedestrian'
+}
+
 export function formatDuration(seconds: number): string {
   const h = Math.floor(seconds / 3600)
   const m = Math.round((seconds % 3600) / 60)
@@ -14,33 +21,33 @@ export function formatDuration(seconds: number): string {
 export async function fetchIsochrones(
   point: [number, number],
   mode: TransportMode,
-  ranges: number[],
-  apiKey: string
+  ranges: number[], // in seconds
+  valhallaUrl: string
 ): Promise<FeatureCollection> {
-  // ORS expects largest range first
-  const sorted = [...ranges].sort((a, b) => b - a)
+  // Valhalla expects minutes, sorted ascending
+  const sorted = [...ranges].sort((a, b) => a - b)
+  const contours = sorted.map((s) => ({ time: s / 60 }))
 
-  const response = await fetch(`https://api.openrouteservice.org/v2/isochrones/${mode}`, {
+  const url = `${valhallaUrl.replace(/\/$/, '')}/isochrone`
+  const response = await fetch(url, {
     method: 'POST',
-    headers: {
-      Authorization: apiKey,
-      'Content-Type': 'application/json',
-      Accept: 'application/json, application/geo+json'
-    },
+    headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify({
-      locations: [point],
-      range: sorted,
-      range_type: 'time',
-      smoothing: 10
+      locations: [{ lon: point[0], lat: point[1] }],
+      costing: COSTING_MAP[mode],
+      contours,
+      polygons: true,
+      denoise: 0.5,
+      generalize: 150
     })
   })
 
   if (!response.ok) {
     const text = await response.text()
-    let msg = `Erreur ORS ${response.status}`
+    let msg = `Erreur Valhalla ${response.status}`
     try {
       const parsed = JSON.parse(text)
-      msg = parsed.error?.message ?? parsed.message ?? msg
+      msg = parsed.error ?? parsed.error_code ? `Valhalla ${parsed.error_code}: ${parsed.error}` : msg
     } catch {
       // ignore
     }
@@ -49,14 +56,15 @@ export async function fetchIsochrones(
 
   const geojson: FeatureCollection = await response.json()
 
-  // ORS returns features largest-first; we assign colors in that order
-  const features: Feature<Polygon | MultiPolygon>[] = geojson.features.map((f, i) => ({
+  // Valhalla returns features smallest-first; reverse for layering (big polygon below)
+  const reversed = [...geojson.features].reverse()
+  const features: Feature<Polygon | MultiPolygon>[] = reversed.map((f, i) => ({
     ...(f as Feature<Polygon | MultiPolygon>),
     properties: {
       ...f.properties,
       isoColor: ISOCHRONE_COLORS[i % ISOCHRONE_COLORS.length],
       isoIndex: i,
-      isoLabel: formatDuration((f.properties?.value as number) ?? sorted[i])
+      isoLabel: formatDuration(((f.properties?.contour as number | undefined) ?? sorted[i] / 60) * 60)
     }
   }))
 
diff --git a/src/renderer/src/components/ControlPanel.tsx b/src/renderer/src/components/ControlPanel.tsx
index 44cb418..22b2299 100644
--- a/src/renderer/src/components/ControlPanel.tsx
+++ b/src/renderer/src/components/ControlPanel.tsx
@@ -7,9 +7,9 @@ import { exportPng, exportGeoJSON } from '../utils/export'
 import { TimeRangeEditor } from './TimeRangeEditor'
 
 const MODES: { value: TransportMode; label: string; icon: string }[] = [
-  { value: 'driving-car', label: 'Voiture', icon: '🚗' },
-  { value: 'cycling-regular', label: 'Vélo', icon: '🚴' },
-  { value: 'foot-walking', label: 'Piéton', icon: '🚶' }
+  { value: 'auto', label: 'Voiture', icon: '🚗' },
+  { value: 'bicycle', label: 'Vélo', icon: '🚴' },
+  { value: 'pedestrian', label: 'Piéton', icon: '🚶' }
 ]
 
 interface ControlPanelProps {
@@ -24,19 +24,19 @@ export function ControlPanel({ mapRef }: ControlPanelProps): React.JSX.Element {
     isochrones,
     loading,
     error,
-    orsApiKey,
+    valhallaUrl,
     setPoint,
     setMode,
     setIsochrones,
     setLoading,
     setError,
-    setOrsApiKey
+    setValhallaUrl
   } = useAppStore()
 
   const [query, setQuery] = useState('')
   const [results, setResults] = useState<NominatimResult[]>([])
   const [showDropdown, setShowDropdown] = useState(false)
-  const [showApiKey, setShowApiKey] = useState(!orsApiKey)
+  const [showSettings, setShowSettings] = useState(false)
   const searchTimer = useRef<ReturnType<typeof setTimeout> | null>(null)
 
   const handleQueryChange = (q: string): void => {
@@ -68,15 +68,10 @@ export function ControlPanel({ mapRef }: ControlPanelProps): React.JSX.Element {
       setError('Cliquez sur la carte pour définir un point de départ.')
       return
     }
-    if (!orsApiKey.trim()) {
-      setError('Clé API ORS manquante.')
-      setShowApiKey(true)
-      return
-    }
     setError(null)
     setLoading(true)
     try {
-      const data = await fetchIsochrones(point, mode, timeRanges, orsApiKey)
+      const data = await fetchIsochrones(point, mode, timeRanges, valhallaUrl)
       setIsochrones(data)
     } catch (e) {
       setError((e as Error).message)
@@ -155,7 +150,7 @@ export function ControlPanel({ mapRef }: ControlPanelProps): React.JSX.Element {
 
       {/* Time ranges */}
       <section className="panel-section">
-        <label className="section-label">Durées de trajet</label>
+        <label className="section-label">Durées de trajet (heures)</label>
         <TimeRangeEditor />
       </section>
 
@@ -185,20 +180,18 @@ export function ControlPanel({ mapRef }: ControlPanelProps): React.JSX.Element {
         </section>
       )}
 
-      {/* API Key */}
+      {/* Settings */}
       <section className="panel-section api-section">
-        <button className="btn-link" onClick={() => setShowApiKey(!showApiKey)}>
-          {showApiKey ? '▲' : '▼'} Clé API ORS
-          {orsApiKey && <span className="key-ok"> ✓</span>}
+        <button className="btn-link" onClick={() => setShowSettings(!showSettings)}>
+          {showSettings ? '▲' : '▼'} Serveur Valhalla
         </button>
-        {showApiKey && (
+        {showSettings && (
           <input
-            type="password"
+            type="text"
             className="input-text"
-            placeholder="Clé API OpenRouteService..."
-            value={orsApiKey}
-            onChange={(e) => setOrsApiKey(e.target.value)}
-            autoComplete="off"
+            placeholder="https://routing.kerboul.me"
+            value={valhallaUrl}
+            onChange={(e) => setValhallaUrl(e.target.value)}
           />
         )}
       </section>
diff --git a/src/renderer/src/components/TimeRangeEditor.tsx b/src/renderer/src/components/TimeRangeEditor.tsx
index b728989..95a08a7 100644
--- a/src/renderer/src/components/TimeRangeEditor.tsx
+++ b/src/renderer/src/components/TimeRangeEditor.tsx
@@ -5,10 +5,8 @@ export function TimeRangeEditor(): React.JSX.Element {
   const { timeRanges, setTimeRanges } = useAppStore()
   const sorted = [...timeRanges].sort((a, b) => a - b)
 
-  const ORS_MAX_SEC = 3600
-
-  const update = (index: number, minutes: number): void => {
-    const sec = Math.min(ORS_MAX_SEC, Math.max(60, Math.round(minutes) * 60))
+  const update = (index: number, hours: number): void => {
+    const sec = Math.max(1800, Math.round(hours * 2) / 2 * 3600) // pas de 0.5h, min 30min
     const next = sorted.map((v, i) => (i === index ? sec : v)).sort((a, b) => a - b)
     setTimeRanges(next)
   }
@@ -20,8 +18,8 @@ export function TimeRangeEditor(): React.JSX.Element {
 
   const add = (): void => {
     if (sorted.length >= 5) return
-    const next = Math.min(ORS_MAX_SEC, Math.max(...sorted) + 600)
-    if (next === Math.max(...sorted)) return // already at max
+    const next = Math.min(36000, Math.max(...sorted) + 3600)
+    if (next === Math.max(...sorted)) return
     setTimeRanges([...sorted, next])
   }
 
@@ -36,13 +34,13 @@ export function TimeRangeEditor(): React.JSX.Element {
           <input
             type="number"
             className="range-input"
-            min={1}
-            max={60}
-            step={5}
-            value={Math.round(t / 60)}
-            onChange={(e) => update(i, parseInt(e.target.value) || 5)}
+            min={0.5}
+            max={10}
+            step={0.5}
+            value={t / 3600}
+            onChange={(e) => update(i, parseFloat(e.target.value) || 0.5)}
           />
-          <span className="range-preview">min — {formatDuration(t)}</span>
+          <span className="range-preview">h — {formatDuration(t)}</span>
           <button
             className="btn-icon"
             onClick={() => remove(i)}
@@ -53,12 +51,11 @@ export function TimeRangeEditor(): React.JSX.Element {
           </button>
         </div>
       ))}
-      {sorted.length < 5 && Math.max(...sorted) < ORS_MAX_SEC && (
+      {sorted.length < 5 && Math.max(...sorted) < 36000 && (
         <button className="btn-add" onClick={add}>
           + Ajouter une durée
         </button>
       )}
-      <p className="hint">Max 60 min — limite API ORS gratuit</p>
     </div>
   )
 }
diff --git a/src/renderer/src/store/useAppStore.ts b/src/renderer/src/store/useAppStore.ts
index 1fda60d..38527cb 100644
--- a/src/renderer/src/store/useAppStore.ts
+++ b/src/renderer/src/store/useAppStore.ts
@@ -1,46 +1,44 @@
 import { create } from 'zustand'
 import type { FeatureCollection } from 'geojson'
 
-export type TransportMode = 'driving-car' | 'cycling-regular' | 'foot-walking'
+export type TransportMode = 'auto' | 'bicycle' | 'pedestrian'
 
 interface AppState {
   point: [number, number] | null
   mode: TransportMode
-  timeRanges: number[]
+  timeRanges: number[] // seconds
   isochrones: FeatureCollection | null
   loading: boolean
   error: string | null
-  orsApiKey: string
+  valhallaUrl: string
   setPoint: (point: [number, number] | null) => void
   setMode: (mode: TransportMode) => void
   setTimeRanges: (ranges: number[]) => void
   setIsochrones: (iso: FeatureCollection | null) => void
   setLoading: (v: boolean) => void
   setError: (e: string | null) => void
-  setOrsApiKey: (key: string) => void
+  setValhallaUrl: (url: string) => void
 }
 
-const STORAGE_KEY = 'ors_api_key'
+const URL_KEY = 'valhalla_url'
+const DEFAULT_URL = (import.meta.env.VITE_VALHALLA_URL as string | undefined) ?? 'https://routing.kerboul.me'
 
 export const useAppStore = create<AppState>((set) => ({
   point: null,
-  mode: 'driving-car',
-  timeRanges: [1200, 2400, 3600], // 20min, 40min, 1h
+  mode: 'auto',
+  timeRanges: [3600, 7200, 14400], // 1h, 2h, 4h
   isochrones: null,
   loading: false,
   error: null,
-  orsApiKey:
-    localStorage.getItem(STORAGE_KEY) ??
-    (import.meta.env.VITE_ORS_API_KEY as string | undefined) ??
-    '',
+  valhallaUrl: localStorage.getItem(URL_KEY) ?? DEFAULT_URL,
   setPoint: (point) => set({ point }),
   setMode: (mode) => set({ mode }),
   setTimeRanges: (timeRanges) => set({ timeRanges }),
   setIsochrones: (isochrones) => set({ isochrones }),
   setLoading: (loading) => set({ loading }),
   setError: (error) => set({ error }),
-  setOrsApiKey: (key) => {
-    localStorage.setItem(STORAGE_KEY, key)
-    set({ orsApiKey: key })
+  setValhallaUrl: (url) => {
+    localStorage.setItem(URL_KEY, url)
+    set({ valhallaUrl: url })
   }
 }))