1 files changed, 21 insertions, 0 deletions
diff --git a/nikola/data/themes/bootstrap/assets/css/theme.css b/nikola/data/themes/bootstrap/assets/css/theme.css
index ccdfda2..761dbb6 100644
--- a/nikola/data/themes/bootstrap/assets/css/theme.css
+++ b/nikola/data/themes/bootstrap/assets/css/theme.css
@@ -172,3 +172,24 @@ h4, h5, h6 {
     padding: 10px 0;
     display: inline-block;
 }
+
+.sr-only {
+    position: absolute;
+    width: 1px;
+    height: 1px;
+    padding: 0;
+    margin: -1px;
+    overflow: hidden;
+    clip: rect(0, 0, 0, 0);
+    border: 0;
+}
+
+.sr-only-focusable:active,
+.sr-only-focusable:focus {
+    position: static;
+    width: auto;
+    height: auto;
+    margin: 0;
+    overflow: visible;
+    clip: auto;
+}