Fix scrolling

style.css

@@ -407,6 +407,10 @@ fieldset.active .fs-body { display: contents; }
 
 /* ── Responsive ───────────────────────────────────────────── */
 @media (max-width: 600px) {
+  /* Fixed viewport so header and footer stay put while main scrolls */
+  body { height: 100dvh; overflow: hidden; }
+  main { overflow-y: auto; }
+
   /* Header: h1 + actions on line 1, search full-width on line 2 */
   header { flex-wrap: wrap; }
   header h1         { order: 1; flex: 1; }