Fix login route theme

lib/ui/widgets/login_scaffold.dart

@@ -18,12 +18,29 @@ class LoginScaffold extends StatelessWidget {
 
     final availableHeight =
         mediaQuery.size.height - mediaQuery.viewInsets.bottom;
-    final minHeight = 400.0;
+    final minHeight = 450.0;
 
     final contentHeight =
         availableHeight < minHeight ? minHeight : availableHeight;
 
-    return Scaffold(
+    return Theme(
+      data: Theme.of(context).copyWith(
+        hintColor: Colors.white,
+        inputDecorationTheme: InputDecorationTheme(
+          errorStyle: TextStyle(color: Colors.white),
+          hintStyle: TextStyle(color: Colors.white),
+          labelStyle: TextStyle(color: Colors.white),
+          focusColor: Colors.white,
+          fillColor: Colors.white,
+          hoverColor: Colors.white,
+        ),
+        scaffoldBackgroundColor: Colors.indigo.shade900,
+        textTheme: TextTheme(
+          body1: TextStyle(color: Colors.white),
+          button: TextStyle(color: Colors.white),
+        ),
+      ),
+      child: Scaffold(
         body: SingleChildScrollView(
           child: Center(
             child: Container(
@@ -51,7 +68,7 @@ class LoginScaffold extends StatelessWidget {
             ),
           ),
         ),
-      backgroundColor: Colors.indigo.shade900,
+      ),
     );
   }
 }