diff --git a/src/app/globals.css b/src/app/globals.css
index 11fff64..326a6aa 100644
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -70,3 +70,16 @@ body {
   color: var(--foreground);
   font-family: Arial, Helvetica, sans-serif;
 }
+
+/* Prevent mobile auto-zoom on input focus.
+   iOS Safari (and other mobile browsers) zoom the viewport whenever a focused
+   input/select/textarea has a font-size below 16px — which is what made the
+   home "Ask AI" popup (and other text-sm inputs) jump and distort the UI.
+   Enforce a 16px minimum on touch devices only; desktop styling is unchanged. */
+@media (pointer: coarse) {
+  input:not([type="checkbox"]):not([type="radio"]):not([type="range"]),
+  select,
+  textarea {
+    font-size: 16px;
+  }
+}