Output over 1MiB is passed back as an ArrayBuffer and an output file card is displayed.

src/web/stylesheets/layout/_io.css

@@ -77,7 +77,8 @@
     transition: all 0.5s ease;
 }
 
-#input-file {
+#input-file,
+#output-file {
     position: absolute;
     left: 0;
     top: 0;