diff --git a/src/app/auth/PodProviderPicker.tsx b/src/app/auth/PodProviderPicker.tsx
index 848f2f3..8dde3ef 100644
--- a/src/app/auth/PodProviderPicker.tsx
+++ b/src/app/auth/PodProviderPicker.tsx
@@ -39,6 +39,10 @@ export function PodProviderPicker({ authProvider, redirect, onDemo }: PodProvide
         flexDirection: 'column',
         height: '100%',
         minHeight: '100dvh',
+        // Full-width buttons are right on mobile; on desktop cap the column so
+        // the sign-in screen reads as a centered card instead of a full-bleed row.
+        maxWidth: 480,
+        margin: '0 auto',
       }}
     >
       <div