diff --git a/src/wp-activate.php b/src/wp-activate.php
index 2ea7cf42a902c..f1eb579e61b19 100644
--- a/src/wp-activate.php
+++ b/src/wp-activate.php
@@ -101,13 +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; }
-		#key { direction: ltr; }
-		#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 { width: 90%; 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: 5px 0; }
+		#key { width: 100%; direction: ltr; }
+		#submit { width: auto; }
+		span.h3 { font-weight: 600; }
 	</style>
 	<?php
 }
diff --git a/src/wp-signup.php b/src/wp-signup.php
index 45b3e09ed5aff..50ab624bb8ca8 100644
--- a/src/wp-signup.php
+++ b/src/wp-signup.php
@@ -64,8 +64,9 @@ function do_signup_header() {
 function wpmu_signup_stylesheet() {
 	?>
 	<style>
-		.mu_register { width: 90%; margin: 0 auto; }
-		.mu_register form { margin-top: 2em; }
+		.mu_register { width: 90%; margin: 0 auto; text-align: start; padding: 24px; box-sizing: border-box; }
+		.mu_register p { font-size: 18px; }
+		.mu_register form { margin: 24px 0; }
 		.mu_register fieldset,
 			.mu_register legend { margin: 0; padding: 0; border: none; }
 		.mu_register .error { padding: 10px; color: #333; background: #ffebe8; border: 1px solid #c00; }