Index: src/wp-admin/css/login.css
===================================================================
--- src/wp-admin/css/login.css	(revision 37712)
+++ src/wp-admin/css/login.css	(working copy)
@@ -14,7 +14,7 @@
 	color: #444;
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen-Sans", "Ubuntu", "Cantarell", "Helvetica Neue", sans-serif;
 	font-size: 13px;
-	line-height: 1.4em;
+	line-height: 1.4;
 }
 
 a {
@@ -64,10 +64,22 @@
 	box-shadow: 0 1px 1px 0 rgba(0,0,0,0.1);
 }
 
+.login .login-error-list {
+	list-style: none;
+	margin: 0;
+	padding: 0;
+}
+
 .login #login_error {
 	border-left-color: #dc3232;
 }
 
+#login_error,
+.login .notice-info {
+	margin: 20px 0;
+	padding: 0;
+}
+
 #loginform p.submit,
 .login-action-lostpassword p.submit {
 	border: none;
Index: src/wp-login.php
===================================================================
--- src/wp-login.php	(revision 37712)
+++ src/wp-login.php	(working copy)
@@ -192,7 +192,7 @@
 				if ( 'message' == $severity )
 					$messages .= '	' . $error_message . "<br />\n";
 				else
-					$errors .= '	' . $error_message . "<br />\n";
+					$errors .= '<li>' . $error_message . '</li>';
 			}
 		}
 		if ( ! empty( $errors ) ) {
@@ -203,7 +203,7 @@
 			 *
 			 * @param string $errors Login error message.
 			 */
-			echo '<div id="login_error">' . apply_filters( 'login_errors', $errors ) . "</div>\n";
+			echo '<div id="login_error"><ul class="login-error-list">' . apply_filters( 'login_errors', $errors ) . "</ul></div>\n";
 		}
 		if ( ! empty( $messages ) ) {
 			/**
@@ -213,7 +213,7 @@
 			 *
 			 * @param string $messages Login messages.
 			 */
-			echo '<p class="message">' . apply_filters( 'login_messages', $messages ) . "</p>\n";
+			echo '<div class="notice-info"><p class="message">' . apply_filters( 'login_messages', $messages ) . "</p></div>\n";
 		}
 	}
 } // End of login_header()
@@ -533,7 +533,7 @@
 	 */
 	do_action( 'lost_password' );
 
-	login_header(__('Lost Password'), '<p class="message">' . __('Please enter your username or email address. You will receive a link to create a new password via email.') . '</p>', $errors);
+	login_header( __( 'Lost Password' ), '<div class="notice-info"><p class="message">' . __( 'Please enter your username or email address. You will receive a link to create a new password via email.' ) . '</p></div>', $errors );
 
 	$user_login = isset($_POST['user_login']) ? wp_unslash($_POST['user_login']) : '';
 
@@ -619,7 +619,7 @@
 	if ( ( ! $errors->get_error_code() ) && isset( $_POST['pass1'] ) && !empty( $_POST['pass1'] ) ) {
 		reset_password($user, $_POST['pass1']);
 		setcookie( $rp_cookie, ' ', time() - YEAR_IN_SECONDS, $rp_path, COOKIE_DOMAIN, is_ssl(), true );
-		login_header( __( 'Password Reset' ), '<p class="message reset-pass">' . __( 'Your password has been reset.' ) . ' <a href="' . esc_url( wp_login_url() ) . '">' . __( 'Log in' ) . '</a></p>' );
+		login_header( __( 'Password Reset' ), '<div class="notice-info"><p class="message reset-pass">' . __( 'Your password has been reset.' ) . ' <a href="' . esc_url( wp_login_url() ) . '">' . __( 'Log in' ) . '</a></p></div>' );
 		login_footer();
 		exit;
 	}
@@ -627,7 +627,7 @@
 	wp_enqueue_script('utils');
 	wp_enqueue_script('user-profile');
 
-	login_header(__('Reset Password'), '<p class="message reset-pass">' . __('Enter your new password below.') . '</p>', $errors );
+	login_header(__('Reset Password'), '<div class="notice-info"><p class="message reset-pass">' . __('Enter your new password below.') . '</p></div>', $errors );
 
 ?>
 <form name="resetpassform" id="resetpassform" action="<?php echo esc_url( network_site_url( 'wp-login.php?action=resetpass', 'login_post' ) ); ?>" method="post" autocomplete="off">
@@ -724,7 +724,7 @@
 	 * @param string $registration_redirect The redirect destination URL.
 	 */
 	$redirect_to = apply_filters( 'registration_redirect', $registration_redirect );
-	login_header(__('Registration Form'), '<p class="message register">' . __('Register For This Site') . '</p>', $errors);
+	login_header(__('Registration Form'), '<div class="notice-info"><p class="message register">' . __('Register For This Site') . '</p></div>', $errors);
 ?>
 <form name="registerform" id="registerform" action="<?php echo esc_url( site_url( 'wp-login.php?action=register', 'login_post' ) ); ?>" method="post" novalidate="novalidate">
 	<p>
@@ -820,7 +820,7 @@
 
 	if ( !is_wp_error($user) && !$reauth ) {
 		if ( $interim_login ) {
-			$message = '<p class="message">' . __('You have logged in successfully.') . '</p>';
+			$message = '<div class="notice-info"><p class="message">' . __('You have logged in successfully.') . '</p></div>';
 			$interim_login = 'success';
 			login_header( '', $message ); ?>
 			</div>