diff --git a/apps/web/src/layout/PanelHost.tsx b/apps/web/src/layout/PanelHost.tsx
index f873ea7..67ad6f5 100644
--- a/apps/web/src/layout/PanelHost.tsx
+++ b/apps/web/src/layout/PanelHost.tsx
@@ -9,6 +9,8 @@ const OPEN_FULL = new Set(["/settings", "/logbook", "/pilots", "/hqs", "/locatio
 /** Screens with extra columns: a wider panel on desktop. */
 const WIDE = new Set(["/contracts", "/logbook"]);
 
+/** The standard desktop panel and its margin; the map always centers beside this. */
+const DESKTOP_PANEL_PX = 436;
 const PEEK_PX = 96;
 const HALF = 0.56;
 const HEADER_PX = 64;
@@ -50,7 +52,8 @@ export function PanelHost({ children }: { children: ReactNode }) {
       const { innerWidth: width, innerHeight: height } = window;
       const desktop = width >= 768;
       const left = desktop ? 96 : 0;
-      const right = desktop ? rect.left : width;
+      // A wider panel covers more of the map rather than moving it.
+      const right = desktop ? width - DESKTOP_PANEL_PX : width;
       const top = desktop ? 0 : HEADER_PX;
       const bottom = desktop ? height : onMap ? height - NAV_PX : rect.top;
       useMapFrame.setState({
diff --git a/apps/web/test/panel-host.test.tsx b/apps/web/test/panel-host.test.tsx
index 52071d2..d2e3860 100644
--- a/apps/web/test/panel-host.test.tsx
+++ b/apps/web/test/panel-host.test.tsx
@@ -31,6 +31,22 @@ describe("the shell (decision 0.5.166)", () => {
     expect(screen.getByTestId("map-canvas")).toBe(canvas);
   });
 
+  it("keeps the map still on desktop when a wider panel opens", async () => {
+    const before = window.innerWidth;
+    window.innerWidth = 1280;
+    try {
+      renderApp(app());
+      await screen.findByRole("heading", { level: 1, name: "Bridge" });
+      const standard = useMapFrame.getState().offsetX;
+      expect(standard).toBe(-170);
+      await userEvent.click(screen.getByRole("link", { name: "Jobs" }));
+      await screen.findByRole("heading", { level: 1, name: "Jobs" });
+      expect(useMapFrame.getState().offsetX).toBe(standard);
+    } finally {
+      window.innerWidth = before;
+    }
+  });
+
   it("shifts the view by the frame without touching the saved camera", () => {
     useMapFrame.setState({ offsetX: 10, offsetY: -20 });
     expect(framed(DEFAULT_CAMERA, useMapFrame.getState())).toEqual({