diff --git a/django/contrib/admin/static/admin/css/base.css b/django/contrib/admin/static/admin/css/base.css
index 22010b7fa9f..1ff93e245ff 100644
--- a/django/contrib/admin/static/admin/css/base.css
+++ b/django/contrib/admin/static/admin/css/base.css
@@ -946,8 +946,11 @@ a.deletelink:focus, a.deletelink:hover {
 #user-tools a:focus, #user-tools a:hover,
 #logout-form button:active, #logout-form button:hover {
     text-decoration: none;
-    border-bottom-color: var(--primary);
-    color: var(--primary);
+    border-bottom: 0;
+}
+
+#logout-form button:active, #logout-form button:hover {
+    margin-bottom: 1px;
 }
 
 /* SIDEBAR */
diff --git a/django/contrib/admin/static/admin/css/responsive.css b/django/contrib/admin/static/admin/css/responsive.css
index 223dba0dd55..9a4615d09e3 100644
--- a/django/contrib/admin/static/admin/css/responsive.css
+++ b/django/contrib/admin/static/admin/css/responsive.css
@@ -45,7 +45,6 @@ input[type="submit"], button {
 
     #branding h1 {
         margin: 0 0 8px;
-        font-size: 1.25rem;
         line-height: 1.2;
     }