Cleaned a bit more

tools/editor/styles/components/empty-state.css

@@ -1,6 +1,9 @@
 /* Component – Empty state */
 
 .empty-state {
+  background: var(--bg-surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
   border-style: dashed;
   padding: 3rem;
   text-align: center;