Continue working on fund us form structure, style and accessibility

assets/css/base.css

@@ -578,6 +578,21 @@ input::-moz-focus-inner {
   }
 }
 
+/* A class for hiding items visually while keeping them visible to assistive technology. Use with caution and avoid where the content can be happily shown. */
+
+.visually-hidden {
+  border: 0 !important;
+  clip: rect(1px, 1px, 1px, 1px) !important;
+  -webkit-clip-path: inset(50%) !important;
+  clip-path: inset(50%) !important;
+  height: 1px !important;
+  overflow: hidden !important;
+  padding: 0 !important;
+  position: absolute !important;
+  width: 1px !important;
+  white-space: nowrap !important;
+}
+
 /* Shortcode elements */
 
 .gist, .s_video_simple, .instagram-media, .s_instagram_simple {