diff --git a/pkg/index.html b/pkg/index.html
index 7fef0fc6..f2d5645d 100644
--- a/pkg/index.html
+++ b/pkg/index.html
@@ -344,6 +344,19 @@ input ~ .tab { display: none }
 #tab4:checked ~ .tab.content4,
 #tab5:checked ~ .tab.content5 { display: block; }
 
+#tab1:checked ~ nav ul li.tab1 label {
+  background: none;
+  border-bottom: 1px solid #c0c0c0;
+}
+#tab2:checked ~ nav ul li.tab2 label {
+  background: none;
+  border-bottom: 1px solid #c0c0c0;
+}
+#tab3:checked ~ nav ul li.tab3 label {
+  background: none;
+  border-bottom: 1px solid #c0c0c0;
+}
+
 input + label {
   border-top: 1px outset #fff;
   border-left: 1px outset #fff;