diff --git a/site/documents/index/_block_layout_index_children.html b/site/documents/index/_block_layout_index_children.html
index f4fabd3..bf47f70 100644
--- a/site/documents/index/_block_layout_index_children.html
+++ b/site/documents/index/_block_layout_index_children.html
@@ -22,7 +22,7 @@ <h2 id="heading-nav-documents">Site documents</h2>
   <h2 id="heading-nav-external-links">External links</h2>
   <nav aria-labelledby="heading-nav-external-links">
     <ul>
-      <li><span><a href="https://github.com/andis-sprinkis/tparts" target="_blank" rel="noreferrer noopener"><code>tparts</code> on GitHub</a></span></li>
+      <li><span><a href="https://github.com/andis-sprinkis/tparts"><code>tparts</code> on GitHub</a></span></li>
     </ul>
   </nav>
 </section>
diff --git a/site/documents/index/static/styles.css b/site/documents/index/static/styles.css
index 0376338..5a42de9 100644
--- a/site/documents/index/static/styles.css
+++ b/site/documents/index/static/styles.css
@@ -141,9 +141,7 @@ a:hover {
   text-underline-offset: var(--underline-offset-active-focus);
 }
 
-a[target='_blank']::after,
-a[href^='mailto:']::after,
-a[href^='tel:']::after {
+a[target='_blank']::after {
   content: var(--url-icon-new-tab);
   display: inline-block;
   width: 1em;
@@ -154,9 +152,7 @@ a[href^='tel:']::after {
 }
 
 @media print {
-  a[target='_blank']::after,
-  a[href^='mailto:']::after,
-  a[href^='tel:']::after {
+  a[target='_blank']::after {
     content: none;
     opacity: initial;
   }