Your changes

lib/widgets/rounded_input.dart

@@ -19,16 +19,27 @@ class RoundedInput extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final radius = BorderRadius.circular(12);
+
     return TextField(
       controller: controller,
       keyboardType: keyboardType,
       obscureText: obscure,
-      maxLines: maxLines,
+      maxLines: obscure ? 1 : maxLines,
+      style: const TextStyle(
+        color: Colors.grey, // grey input text
+      ),
       decoration: InputDecoration(
         filled: true,
+        fillColor: const Color(0xFFD8E7FF), // light blue background
         hintText: hint,
+        hintStyle: const TextStyle(
+          color: Colors.grey, // grey hint text
+        ),
         contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
-        border: OutlineInputBorder(borderRadius: radius, borderSide: BorderSide.none),
+        border: OutlineInputBorder(
+          borderRadius: radius,
+          borderSide: BorderSide.none,
+        ),
       ),
     );
   }