diff --git a/src/styles/shell.css b/src/styles/shell.css
index 1a44e1b..4f98775 100644
--- a/src/styles/shell.css
+++ b/src/styles/shell.css
@@ -11,6 +11,18 @@
   box-sizing: border-box;
 }
 
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
+
 html {
   font-size: 17px;
 }