diff --git a/app/Http/Controllers/Auth/SsoLoginController.php b/app/Http/Controllers/Auth/SsoLoginController.php
index 683beed..632caa2 100644
--- a/app/Http/Controllers/Auth/SsoLoginController.php
+++ b/app/Http/Controllers/Auth/SsoLoginController.php
@@ -11,7 +11,9 @@ use Illuminate\Http\Request;
 use Illuminate\Http\Response;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Facades\Route;
 use Illuminate\Support\Str;
+use Illuminate\View\View;
 
 /**
  * "Sign in with Ladill" — Authorization Code + PKCE against auth.ladill.com.
@@ -19,7 +21,7 @@ use Illuminate\Support\Str;
  */
 class SsoLoginController extends Controller
 {
-    public function connect(Request $request): RedirectResponse
+    public function connect(Request $request): RedirectResponse|View
     {
         $intended = (string) $request->query('redirect', route('give.dashboard'));
 
@@ -58,10 +60,26 @@ class SsoLoginController extends Controller
             $query['prompt'] = 'none';
         }
 
-        return redirect()->away(rtrim((string) config('services.ladill_sso.issuer'), '/').'/oauth/authorize?'.http_build_query($query));
+        $authorizeUrl = rtrim((string) config('services.ladill_sso.issuer'), '/').'/oauth/authorize?'.http_build_query($query);
+
+        if ($request->boolean('interactive') && ! $request->boolean('fallback')) {
+            $request->session()->put('sso.popup', true);
+
+            return view('auth.sso-signing-in', [
+                'authorizeUrl' => $authorizeUrl,
+                'intended' => $intended,
+                'fallbackUrl' => route('sso.connect', [
+                    'redirect' => $intended,
+                    'interactive' => 1,
+                    'fallback' => 1,
+                ]),
+            ]);
+        }
+
+        return redirect()->away($authorizeUrl);
     }
 
-    public function callback(Request $request): RedirectResponse
+    public function callback(Request $request): RedirectResponse|View
     {
         $intended = (string) $request->session()->get('sso.intended', route('give.dashboard'));
 
@@ -74,18 +92,12 @@ class SsoLoginController extends Controller
                 ]);
             }
 
-            return redirect()->route('sso.connect', [
-                'redirect' => $intended,
-                'interactive' => 1,
-            ]);
+            return $this->finishCallback($request, $intended, (string) $request->query('error_description', $request->query('error')));
         }
 
         if (! $request->filled('code')
             || $request->query('state') !== $request->session()->pull('sso.state')) {
-            return redirect()->route('sso.connect', [
-                'redirect' => $intended,
-                'interactive' => 1,
-            ]);
+            return $this->finishCallback($request, $intended, 'invalid_state');
         }
 
         $issuer = rtrim((string) config('services.ladill_sso.issuer'), '/');
@@ -99,18 +111,12 @@ class SsoLoginController extends Controller
             'code_verifier' => (string) $request->session()->pull('sso.verifier'),
         ]);
         if ($tokenRes->failed()) {
-            return redirect()->route('sso.connect', [
-                'redirect' => $intended,
-                'interactive' => 1,
-            ]);
+            return $this->finishCallback($request, $intended, 'token_exchange_failed');
         }
 
         $user = $this->loginFromTokenResponse($request, $tokenRes);
         if (! $user) {
-            return redirect()->route('sso.connect', [
-                'redirect' => $intended,
-                'interactive' => 1,
-            ]);
+            return $this->finishCallback($request, $intended, 'userinfo_failed');
         }
 
         QrTeamMember::linkPendingInvitesFor($user);
@@ -118,7 +124,7 @@ class SsoLoginController extends Controller
         Auth::login($user, remember: true);
         $request->session()->regenerate();
 
-        return $this->safeRedirect($intended, route('give.dashboard'));
+        return $this->finishCallback($request, $intended);
     }
 
     public function logout(Request $request): RedirectResponse
@@ -127,10 +133,24 @@ class SsoLoginController extends Controller
         $request->session()->invalidate();
         $request->session()->regenerateToken();
 
-        $home = 'https://'.config('app.platform_domain');
-        $endSession = 'https://'.config('app.auth_domain').'/logout/sso?redirect='.urlencode($home);
+        return redirect()->route('sso.logout-bridge', [
+            'return' => $this->defaultSignedOutUrl(),
+        ]);
+    }
 
-        return redirect()->away($endSession);
+    public function logoutBridge(Request $request): View
+    {
+        $return = $this->safeReturnUrl((string) $request->query('return', ''));
+        $hubUrl = 'https://'.config('app.auth_domain').'/logout/sso/hub?'.http_build_query([
+            'embedded' => 1,
+            'return' => $return,
+        ]);
+
+        return view('auth.sso-logout-bridge', [
+            'hubUrl' => $hubUrl,
+            'return' => $return,
+            'authOrigin' => 'https://'.config('app.auth_domain'),
+        ]);
     }
 
     public function frontchannelLogout(Request $request): Response|RedirectResponse
@@ -228,6 +248,50 @@ class SsoLoginController extends Controller
         return strtolower((string) $user->email) !== $mailbox;
     }
 
+    private function finishCallback(Request $request, string $intended, ?string $error = null): RedirectResponse|View
+    {
+        if ($request->session()->pull('sso.popup')) {
+            return view('auth.sso-popup-done', [
+                'intended' => $intended,
+                'error' => $error,
+                'appOrigin' => rtrim((string) config('app.url'), '/'),
+            ]);
+        }
+
+        if ($error) {
+            return redirect()->route('sso.connect', [
+                'redirect' => $intended,
+                'interactive' => 1,
+            ]);
+        }
+
+        return $this->safeRedirect($intended, route('give.dashboard'));
+    }
+
+    private function defaultSignedOutUrl(): string
+    {
+        foreach (array_keys(Route::getRoutes()->getRoutesByName()) as $name) {
+            if (str_ends_with($name, '.signed-out')) {
+                return route($name);
+            }
+        }
+
+        return 'https://'.config('app.platform_domain');
+    }
+
+    private function safeReturnUrl(string $url): string
+    {
+        $host = parse_url($url, PHP_URL_HOST);
+        $root = (string) config('app.platform_domain', 'ladill.com');
+
+        if (is_string($host) && str_starts_with($url, 'https://')
+            && ($host === $root || str_ends_with($host, '.'.$root))) {
+            return $url;
+        }
+
+        return $this->defaultSignedOutUrl();
+    }
+
     private function safeRedirect(string $url, string $fallback): RedirectResponse
     {
         $host = parse_url($url, PHP_URL_HOST);
diff --git a/resources/views/auth/sso-logout-bridge.blade.php b/resources/views/auth/sso-logout-bridge.blade.php
new file mode 100644
index 0000000..2540367
--- /dev/null
+++ b/resources/views/auth/sso-logout-bridge.blade.php
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Signing out…</title>
+    @include('partials.favicon')
+    <meta name="robots" content="noindex">
+    <style>
+        body { font-family: system-ui, sans-serif; display: flex; min-height: 100vh; align-items: center; justify-content: center; margin: 0; background: #f8fafc; color: #334155; }
+    </style>
+</head>
+<body>
+    <p>Signing you out of Ladill…</p>
+    <iframe src="{{ $hubUrl }}" hidden width="0" height="0" title=""></iframe>
+    <script>
+        window.addEventListener('message', function (event) {
+            if (event.origin !== @json($authOrigin)) return;
+            if (event.data && event.data.type === 'ladill:logout:done' && event.data.return) {
+                window.location.replace(event.data.return);
+            }
+        });
+        setTimeout(function () { window.location.replace(@json($return)); }, 5000);
+    </script>
+</body>
+</html>
diff --git a/resources/views/auth/sso-popup-done.blade.php b/resources/views/auth/sso-popup-done.blade.php
new file mode 100644
index 0000000..9b3b877
--- /dev/null
+++ b/resources/views/auth/sso-popup-done.blade.php
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Signing in…</title>
+    <meta name="robots" content="noindex">
+</head>
+<body>
+    <script>
+        (function () {
+            var intended = @json($intended);
+            var appOrigin = @json($appOrigin);
+            @if ($error)
+            if (window.opener) {
+                window.opener.postMessage({ type: 'ladill:sso:error' }, appOrigin);
+                window.close();
+            } else {
+                window.location.replace(@json(route('sso.connect', ['redirect' => $intended, 'interactive' => 1, 'fallback' => 1])));
+            }
+            @else
+            if (window.opener) {
+                window.opener.postMessage({ type: 'ladill:sso:success', return: intended }, appOrigin);
+                window.close();
+            } else {
+                window.location.replace(intended);
+            }
+            @endif
+        })();
+    </script>
+</body>
+</html>
diff --git a/resources/views/auth/sso-signing-in.blade.php b/resources/views/auth/sso-signing-in.blade.php
new file mode 100644
index 0000000..232c698
--- /dev/null
+++ b/resources/views/auth/sso-signing-in.blade.php
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Signing in…</title>
+    @include('partials.favicon')
+    <meta name="robots" content="noindex">
+    <style>
+        body { font-family: system-ui, sans-serif; display: flex; min-height: 100vh; align-items: center; justify-content: center; margin: 0; background: #f8fafc; color: #334155; }
+    </style>
+</head>
+<body>
+    <p>Signing you in with Ladill…</p>
+    <script>
+        (function () {
+            var intended = @json($intended);
+            var authorizeUrl = @json($authorizeUrl);
+            var fallbackUrl = @json($fallbackUrl);
+
+            window.addEventListener('message', function (event) {
+                if (event.origin !== window.location.origin) return;
+                if (!event.data) return;
+                if (event.data.type === 'ladill:sso:success') {
+                    window.location.replace(event.data.return || intended);
+                } else if (event.data.type === 'ladill:sso:error') {
+                    window.location.replace(fallbackUrl);
+                }
+            });
+
+            var popup = window.open(authorizeUrl, 'ladill_sso', 'width=520,height=720');
+            if (!popup) {
+                window.location.replace(fallbackUrl);
+            }
+        })();
+    </script>
+</body>
+</html>
diff --git a/routes/web.php b/routes/web.php
index e93e52d..0f63748 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -22,6 +22,7 @@ Route::get('/login', [SsoLoginController::class, 'connect'])->name('login');
 Route::get('/sso/connect', [SsoLoginController::class, 'connect'])->name('sso.connect');
 Route::get('/sso/callback', [SsoLoginController::class, 'callback'])->name('sso.callback');
 Route::post('/logout', [SsoLoginController::class, 'logout'])->name('logout');
+Route::get('/sso/logout-bridge', [SsoLoginController::class, 'logoutBridge'])->name('sso.logout-bridge');
 Route::get('/sso/logout-frontchannel', [SsoLoginController::class, 'frontchannelLogout'])->name('sso.logout-frontchannel');
 Route::get('/signed-out', fn () => auth()->check() ? redirect()->route('give.dashboard') : view('give.signed-out'))->name('give.signed-out');