diff --git a/static/themes/default/css/plinth.css b/static/themes/default/css/plinth.css
index 542d0b93d..89c1e7b30 100644
--- a/static/themes/default/css/plinth.css
+++ b/static/themes/default/css/plinth.css
@@ -149,6 +149,13 @@ body {
     width: 100%;
     border-radius: 0;
     border: none;
+    text-align: left;
+    padding: 3px 20px;
+}
+
+.form-diagnostics-button .btn:hover,
+.form-diagnostics-button .btn:focus {
+    background-color:#f5f5f5
 }
 
 /* Hide log out button if user dropdown is available */