update ui

app.py

@@ -1452,6 +1452,11 @@ label { font-weight: 500 !important; color: #374151 !important; }
     flex-wrap: nowrap !important;
 }
 #header_title { flex: 1 1 auto !important; }
+/* scoped to the app title so the generic .prose h1 rule stays put */
+#header_title h1 {
+    font-size: 1.85rem !important;
+    letter-spacing: -0.02em !important;
+}
 #how_to_use_btn {
     flex: 0 0 auto !important;
     width: auto !important;