diff --git a/.gitignore b/.gitignore
index 14a6e94..c657b21 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ fotospiel-tenant-app
 /public/build
 /public/hot
 /public/storage
+/public/fonts/google
 /resources/js/actions
 /resources/js/routes
 /resources/js/wayfinder
diff --git a/resources/js/admin/pages/EventBrandingPage.tsx b/resources/js/admin/pages/EventBrandingPage.tsx
index afae40b..163d5d8 100644
--- a/resources/js/admin/pages/EventBrandingPage.tsx
+++ b/resources/js/admin/pages/EventBrandingPage.tsx
@@ -21,6 +21,9 @@ import { getContrastingTextColor } from '../../guest/lib/color';
 import { buildEventTabs } from '../lib/eventTabs';
 import { ensureFontLoaded, useTenantFonts } from '../lib/fonts';
 
+const DEFAULT_FONT_VALUE = '__default';
+const CUSTOM_FONT_VALUE = '__custom';
+
 type BrandingForm = {
   useDefault: boolean;
   palette: {
@@ -318,12 +321,12 @@ export default function EventBrandingPage(): React.ReactElement {
   }
 
   const resolveFontSelectValue = (current: string): string => {
-    if (!current) return '';
-    return availableFonts.some((font) => font.family === current) ? current : '__custom';
+    if (!current) return DEFAULT_FONT_VALUE;
+    return availableFonts.some((font) => font.family === current) ? current : CUSTOM_FONT_VALUE;
   };
 
   const handleFontSelect = (key: 'heading' | 'body', value: string) => {
-    const resolved = value === '__custom' ? '' : value;
+    const resolved = value === CUSTOM_FONT_VALUE || value === DEFAULT_FONT_VALUE ? '' : value;
     setForm((prev) => ({ ...prev, typography: { ...prev.typography, [key]: resolved } }));
     const font = availableFonts.find((entry) => entry.family === resolved);
     if (font) {
@@ -446,11 +449,11 @@ export default function EventBrandingPage(): React.ReactElement {
                     <SelectValue placeholder={t('branding.fontDefault', 'Standard (Tenant)')} />
                   </SelectTrigger>
                   <SelectContent>
-                    <SelectItem value="">{t('branding.fontDefault', 'Standard (Tenant)')}</SelectItem>
+                    <SelectItem value={DEFAULT_FONT_VALUE}>{t('branding.fontDefault', 'Standard (Tenant)')}</SelectItem>
                     {availableFonts.map((font) => (
                       <SelectItem key={font.family} value={font.family}>{font.family}</SelectItem>
                     ))}
-                    <SelectItem value="__custom">{t('branding.fontCustom', 'Eigene Schrift eingeben')}</SelectItem>
+                    <SelectItem value={CUSTOM_FONT_VALUE}>{t('branding.fontCustom', 'Eigene Schrift eingeben')}</SelectItem>
                   </SelectContent>
                 </Select>
                 <Input
@@ -471,11 +474,11 @@ export default function EventBrandingPage(): React.ReactElement {
                     <SelectValue placeholder={t('branding.fontDefault', 'Standard (Tenant)')} />
                   </SelectTrigger>
                   <SelectContent>
-                    <SelectItem value="">{t('branding.fontDefault', 'Standard (Tenant)')}</SelectItem>
+                    <SelectItem value={DEFAULT_FONT_VALUE}>{t('branding.fontDefault', 'Standard (Tenant)')}</SelectItem>
                     {availableFonts.map((font) => (
                       <SelectItem key={font.family} value={font.family}>{font.family}</SelectItem>
                     ))}
-                    <SelectItem value="__custom">{t('branding.fontCustom', 'Eigene Schrift eingeben')}</SelectItem>
+                    <SelectItem value={CUSTOM_FONT_VALUE}>{t('branding.fontCustom', 'Eigene Schrift eingeben')}</SelectItem>
                   </SelectContent>
                 </Select>
                 <Input
diff --git a/resources/js/admin/pages/components/InviteLayoutCustomizerPanel.tsx b/resources/js/admin/pages/components/InviteLayoutCustomizerPanel.tsx
index 2703861..cf04efc 100644
--- a/resources/js/admin/pages/components/InviteLayoutCustomizerPanel.tsx
+++ b/resources/js/admin/pages/components/InviteLayoutCustomizerPanel.tsx
@@ -33,6 +33,8 @@ import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/component
 import { cn } from '@/lib/utils';
 import { ensureFontLoaded, useTenantFonts } from '../../lib/fonts';
 
+const DEFAULT_FONT_VALUE = '__default';
+
 import type { EventQrInvite, EventQrInviteLayout } from '../../api';
 import { authorizedFetch } from '../../auth/tokens';
 
@@ -271,19 +273,6 @@ export function InviteLayoutCustomizerPanel({
   const appliedLayoutRef = React.useRef<string | null>(null);
   const appliedInviteRef = React.useRef<number | string | null>(null);
 
-  const handleElementFontChange = React.useCallback(
-    (id: string, family: string) => {
-      updateElement(id, { fontFamily: family || null });
-      const font = availableFonts.find((entry) => entry.family === family);
-      if (font) {
-        void ensureFontLoaded(font).then(() => {
-          fabricCanvasRef.current?.requestRenderAll();
-        });
-      }
-    },
-    [availableFonts, updateElement]
-  );
-
   React.useEffect(() => {
     if (!availableFonts.length || !elements.length) {
       return;
@@ -609,6 +598,19 @@ export function InviteLayoutCustomizerPanel({
     [commitElements]
   );
 
+  const handleElementFontChange = React.useCallback(
+    (id: string, family: string) => {
+      updateElement(id, { fontFamily: family || null });
+      const font = availableFonts.find((entry) => entry.family === family);
+      if (font) {
+        void ensureFontLoaded(font).then(() => {
+          fabricCanvasRef.current?.requestRenderAll();
+        });
+      }
+    },
+    [availableFonts, updateElement]
+  );
+
   React.useEffect(() => {
     if (!invite) {
       setAvailableLayouts([]);
@@ -1340,15 +1342,15 @@ export function InviteLayoutCustomizerPanel({
             <div className="space-y-2">
               <Label>{t('invites.customizer.elements.fontFamily', 'Schriftart')}</Label>
               <Select
-                value={availableFonts.some((font) => font.family === element.fontFamily) ? element.fontFamily ?? '' : ''}
-                onValueChange={(value) => handleElementFontChange(element.id, value)}
+                value={availableFonts.some((font) => font.family === element.fontFamily) ? element.fontFamily ?? DEFAULT_FONT_VALUE : DEFAULT_FONT_VALUE}
+                onValueChange={(value) => handleElementFontChange(element.id, value === DEFAULT_FONT_VALUE ? '' : value)}
                 disabled={fontsLoading}
               >
                 <SelectTrigger>
                   <SelectValue placeholder={t('invites.customizer.elements.fontPlaceholder', 'Standard')} />
                 </SelectTrigger>
                 <SelectContent>
-                  <SelectItem value="">{t('invites.customizer.elements.fontPlaceholder', 'Standard')}</SelectItem>
+                  <SelectItem value={DEFAULT_FONT_VALUE}>{t('invites.customizer.elements.fontPlaceholder', 'Standard')}</SelectItem>
                   {availableFonts.map((font) => (
                     <SelectItem key={font.family} value={font.family}>{font.family}</SelectItem>
                   ))}
diff --git a/resources/js/admin/router.tsx b/resources/js/admin/router.tsx
index 26b660c..2dd0526 100644
--- a/resources/js/admin/router.tsx
+++ b/resources/js/admin/router.tsx
@@ -8,6 +8,7 @@ import {
   ADMIN_LOGIN_START_PATH,
   ADMIN_PUBLIC_LANDING_PATH,
 } from './constants';
+import RouteErrorElement from '@/components/RouteErrorElement';
 const LoginPage = React.lazy(() => import('./pages/LoginPage'));
 const DashboardPage = React.lazy(() => import('./pages/DashboardPage'));
 const EventsPage = React.lazy(() => import('./pages/EventsPage'));
@@ -86,6 +87,7 @@ export const router = createBrowserRouter([
   {
     path: ADMIN_BASE_PATH,
     element: <Outlet />,
+    errorElement: <RouteErrorElement />,
     children: [
       { index: true, element: <LandingGate /> },
       { path: 'login', element: <LoginPage /> },
@@ -124,5 +126,6 @@ export const router = createBrowserRouter([
   {
     path: '*',
     element: <Navigate to={ADMIN_PUBLIC_LANDING_PATH} replace />,
+    errorElement: <RouteErrorElement />,
   },
 ]);
diff --git a/resources/js/components/RouteErrorElement.tsx b/resources/js/components/RouteErrorElement.tsx
new file mode 100644
index 0000000..1f9bd72
--- /dev/null
+++ b/resources/js/components/RouteErrorElement.tsx
@@ -0,0 +1,50 @@
+import React from 'react';
+import { isRouteErrorResponse, useNavigate, useRouteError } from 'react-router-dom';
+import { AlertTriangle, RotateCcw } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+
+export function RouteErrorElement(): React.ReactElement {
+  const error = useRouteError();
+  const navigate = useNavigate();
+
+  const statusText = (() => {
+    if (isRouteErrorResponse(error)) {
+      return `${error.status} ${error.statusText}`;
+    }
+    if (error instanceof Error) {
+      return error.message;
+    }
+    return 'Unerwarteter Fehler';
+  })();
+
+  return (
+    <div className="flex min-h-screen items-center justify-center bg-slate-50 px-4 py-10 text-slate-900 dark:bg-slate-950 dark:text-slate-50">
+      <div className="w-full max-w-lg rounded-2xl border border-slate-200 bg-white p-6 shadow-lg dark:border-slate-800 dark:bg-slate-900">
+        <div className="flex items-center gap-3">
+          <div className="flex h-10 w-10 items-center justify-center rounded-full bg-amber-100 text-amber-700 dark:bg-amber-900/40 dark:text-amber-200">
+            <AlertTriangle className="h-5 w-5" />
+          </div>
+          <div>
+            <p className="text-sm font-semibold text-slate-900 dark:text-slate-50">Unerwarteter Fehler</p>
+            <p className="text-xs text-slate-600 dark:text-slate-300">{statusText}</p>
+          </div>
+        </div>
+        <p className="mt-4 text-sm text-slate-700 dark:text-slate-200">
+          Etwas ist schiefgelaufen. Du kannst es erneut versuchen oder zur letzten Seite zurückkehren.
+        </p>
+        <div className="mt-5 flex flex-wrap gap-2">
+          <Button variant="outline" onClick={() => navigate(-1)}>
+            Zurück
+          </Button>
+          <Button onClick={() => window.location.reload()}>
+            <RotateCcw className="mr-2 h-4 w-4" /> Neu laden
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default RouteErrorElement;
+
diff --git a/resources/js/guest/router.tsx b/resources/js/guest/router.tsx
index ac7df7e..011f506 100644
--- a/resources/js/guest/router.tsx
+++ b/resources/js/guest/router.tsx
@@ -14,6 +14,7 @@ import { useTranslation, type TranslateFn } from './i18n/useTranslation';
 import type { EventBranding } from './types/event-branding';
 import type { EventBrandingPayload, FetchEventErrorCode } from './services/eventApi';
 import { NotificationCenterProvider } from './context/NotificationCenterContext';
+import RouteErrorElement from '@/components/RouteErrorElement';
 
 const LandingPage = React.lazy(() => import('./pages/LandingPage'));
 const ProfileSetupPage = React.lazy(() => import('./pages/ProfileSetupPage'));
@@ -57,19 +58,21 @@ function HomeLayout() {
 }
 
 export const router = createBrowserRouter([
-  { path: '/event', element: <SimpleLayout title="Event"><LandingPage /></SimpleLayout> },
-  { path: '/share/:slug', element: <SharedPhotoPage /> },
+  { path: '/event', element: <SimpleLayout title="Event"><LandingPage /></SimpleLayout>, errorElement: <RouteErrorElement /> },
+  { path: '/share/:slug', element: <SharedPhotoPage />, errorElement: <RouteErrorElement /> },
   {
     path: '/setup/:token',
-    element: <SetupLayout />,
+    element: <SetupLayout />, 
+    errorElement: <RouteErrorElement />,
     children: [
       { index: true, element: <ProfileSetupPage /> },
     ],
   },
-  { path: '/g/:token', element: <PublicGalleryPage /> },
+  { path: '/g/:token', element: <PublicGalleryPage />, errorElement: <RouteErrorElement /> },
   {
     path: '/e/:token',
     element: <HomeLayout />,
+    errorElement: <RouteErrorElement />,
     children: [
       { index: true, element: <HomePage /> },
       { path: 'tasks', element: <TaskPickerPage /> },
@@ -84,11 +87,11 @@ export const router = createBrowserRouter([
       { path: 'help/:slug', element: <HelpArticlePage /> },
     ],
   },
-  { path: '/settings', element: <SimpleLayout title="Einstellungen"><SettingsPage /></SimpleLayout> },
-  { path: '/legal/:page', element: <SimpleLayout title="Rechtliches"><LegalPage /></SimpleLayout> },
-  { path: '/help', element: <HelpStandalone /> },
-  { path: '/help/:slug', element: <HelpArticleStandalone /> },
-  { path: '*', element: <NotFoundPage /> },
+  { path: '/settings', element: <SimpleLayout title="Einstellungen"><SettingsPage /></SimpleLayout>, errorElement: <RouteErrorElement /> },
+  { path: '/legal/:page', element: <SimpleLayout title="Rechtliches"><LegalPage /></SimpleLayout>, errorElement: <RouteErrorElement /> },
+  { path: '/help', element: <HelpStandalone />, errorElement: <RouteErrorElement /> },
+  { path: '/help/:slug', element: <HelpArticleStandalone />, errorElement: <RouteErrorElement /> },
+  { path: '*', element: <NotFoundPage />, errorElement: <RouteErrorElement /> },
 ]);
 
 function EventBoundary({ token }: { token: string }) {