diff --git a/packages/shared/src/schemas.ts b/packages/shared/src/schemas.ts
index 38fdf48..f149ed1 100644
--- a/packages/shared/src/schemas.ts
+++ b/packages/shared/src/schemas.ts
@@ -7,14 +7,17 @@ export const usernameSchema = z
   .toLowerCase()
   .regex(/^[a-z0-9_]{3,32}$/, 'Username must be 3-32 characters: letters, numbers, underscores');
 
+// Trim before validating: iOS keyboards often append a space after autocompleting an email.
+const emailSchema = z.string().trim().toLowerCase().pipe(z.email());
+
 export const registerSchema = z.object({
   username: usernameSchema,
-  email: z.email().trim().toLowerCase(),
+  email: emailSchema,
   password: z.string().min(8, 'Password must be at least 8 characters').max(200),
 });
 
 export const loginSchema = z.object({
-  email: z.email().trim().toLowerCase(),
+  email: emailSchema,
   password: z.string().min(1).max(200),
 });