diff --git a/src/app.rs b/src/app.rs
index 539b210..c2fea3e 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -1244,6 +1244,20 @@ fn AlternativeCard(
                                                     .into_any();
                                                 }
 
+                                                if req.kind == "hidden" {
+                                                    // A carrier value only — no label row, or a
+                                                    // preset key reads as a second visible field.
+                                                    return view! {
+                                                        <input
+                                                            id=field_id
+                                                            type="hidden"
+                                                            prop:value=move || sig.get()
+                                                            on:input=move |ev| sig.set(event_target_value(&ev))
+                                                        />
+                                                    }
+                                                    .into_any();
+                                                }
+
                                                 view! {
                                                     <label class="field" for=label_for>
                                                         {label_text}