diff --git a/src/wp-activate.php b/src/wp-activate.php
index 103df0364e973..e98c75b84c53f 100644
--- a/src/wp-activate.php
+++ b/src/wp-activate.php
@@ -101,12 +101,13 @@ function do_activate_header() {
 function wpmu_activate_stylesheet() {
 	?>
 	<style>
-		.wp-activate-container { width: 90%; margin: 0 auto; }
-		.wp-activate-container form { margin-top: 2em; }
-		#submit, #key { width: 100%; font-size: 24px; box-sizing: border-box; }
-		#language { margin-top: 0.5em; }
-		.wp-activate-container .error { background: #f66; color: #333; }
-		span.h3 { padding: 0 8px; font-size: 1.3em; font-weight: 600; }
+		.wp-activate-container { max-width: 1280px; width: 100%; margin: 0 auto; text-align: start; padding: 24px; box-sizing: border-box; }
+		.wp-activate-container form { margin: 24px 0; }
+		.wp-activate-container p { font-size: 18px; }
+		#key, #submit { font-size: 24px; box-sizing: border-box; margin: 2px 0; }
+		#key { width: 100%; }
+		#submit { width: auto; }
+		span.h3 { font-weight: 600; }
 	</style>
 	<?php
 }