diff --git a/doc/api_assets/style.css b/doc/api_assets/style.css
index c54804269c38e5..242cc6a7d11db2 100644
--- a/doc/api_assets/style.css
+++ b/doc/api_assets/style.css
@@ -576,14 +576,14 @@ kbd {
   background-color: #eee;
   border-radius: 3px;
   border: 1px solid #b4b4b4;
-  box-shadow: 0 1px 1px rgba(0, 0, 0, .2), 0 2px 0 0 rgba(255, 255, 255, .7) inset;
+  box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
   color: #333;
   display: inline-block;
   font-size: .85em;
   font-weight: 700;
-  line-height: 1;
   padding: 2px 4px;
   white-space: nowrap;
+  vertical-align: middle;
  }
 
 .changelog > summary {