diff --git a/tests/e2e/oikos-kitchen-assist-flow.spec.mjs b/tests/e2e/oikos-kitchen-assist-flow.spec.mjs
index 7ec6ec1..c7f905c 100644
--- a/tests/e2e/oikos-kitchen-assist-flow.spec.mjs
+++ b/tests/e2e/oikos-kitchen-assist-flow.spec.mjs
@@ -141,6 +141,42 @@ function makeDiagnostics(page) {
   return diagnostics;
 }
 
+test.describe('Oikos route guards and responsive edge coverage', () => {
+  test('Protected kitchen routes send anonymous users to login instead of leaking a blank app', async ({ page }) => {
+    for (const route of ['/', '/meals', '/shopping']) {
+      await page.context().clearCookies();
+      await page.goto(route, { waitUntil: 'domcontentloaded' });
+      await expect(page.locator('#login-form')).toBeVisible({ timeout: 10_000 });
+      await expect(page.locator('#username')).toBeVisible();
+    }
+  });
+
+  test('Kitchen/Studio works at mobile edge width without horizontal overflow', async ({ page }, testInfo) => {
+    const diagnostics = makeDiagnostics(page);
+    await page.setViewportSize({ width: 390, height: 844 });
+    await page.addInitScript(() => localStorage.setItem('oikos-onboarded', '1'));
+    await login(page);
+    await page.goto('/meals', { waitUntil: 'domcontentloaded' });
+    await dismissOnboardingIfPresent(page);
+
+    const studioHost = page.locator('[data-oikos-meal-plan-studio]');
+    await expect(studioHost).toBeVisible({ timeout: 15_000 });
+    await expect(studioHost).toContainText(/Meal Plan Studio|Børnenes madplan/i);
+    await expect(page.getByRole('button', { name: /Generér ugeplan|Regenerér|Meal Plan Studio/i }).first()).toBeVisible();
+
+    const overflow = await page.evaluate(() => ({
+      innerWidth: window.innerWidth,
+      scrollWidth: document.documentElement.scrollWidth,
+      bodyScrollWidth: document.body.scrollWidth,
+    }));
+    diagnostics.mobileOverflow = overflow;
+    await attachDiagnostics(testInfo, diagnostics);
+
+    expect(overflow.scrollWidth, `mobile page should not cause sideways scrolling: ${JSON.stringify(overflow)}`).toBeLessThanOrEqual(overflow.innerWidth + 12);
+    expect(diagnostics.pageErrors, 'No browser page errors during mobile Kitchen smoke').toEqual([]);
+  });
+});
+
 test.describe('Oikos Kitchen + Assist meal-planning flow', () => {
   test('Kitchen opens quickly, Studio is present, and Assist routes meal plans into Studio', async ({ page }, testInfo) => {
     const diagnostics = makeDiagnostics(page);