diff --git a/apps/ai-game-creator-shell/src/styles.css b/apps/ai-game-creator-shell/src/styles.css
index a0f35682f..3718d6153 100644
--- a/apps/ai-game-creator-shell/src/styles.css
+++ b/apps/ai-game-creator-shell/src/styles.css
@@ -2605,6 +2605,8 @@ textarea {
   isolation: isolate;
   display: grid;
   gap: 9px;
+  min-height: 78px;
+  box-sizing: border-box;
   margin-top: 12px;
   padding: 12px 14px;
   border: 1px solid #b9d8c5;