diff --git a/app/assets/stylesheets/earthworks.css b/app/assets/stylesheets/earthworks.css
index b4b29f02..84a5021e 100644
--- a/app/assets/stylesheets/earthworks.css
+++ b/app/assets/stylesheets/earthworks.css
@@ -143,7 +143,7 @@
   padding: .5rem;
   border-radius: .25rem;
   background-color: white;
-  width: 100%;
+  width: 100%; /* overrides https://github.com/projectblacklight/blacklight/blob/69373f202753f04ec6aca179fdf8fa01248a9edf/app/assets/stylesheets/blacklight/_header.scss#L32 */
   @media (min-width: 576px) {
     max-width: 520px;
   }
@@ -315,4 +315,4 @@ label.toggle-bookmark {
 .header-tools > *:hover {
   --bs-link-color-rgb: var(--stanford-digital-blue-dark-rgb);
   text-decoration: underline;
-}
\ No newline at end of file
+}