Index: src/wp-admin/css/common.css
===================================================================
--- src/wp-admin/css/common.css	(revision 34692)
+++ src/wp-admin/css/common.css	(working copy)
@@ -1958,15 +1958,20 @@
 	border-bottom: none;
 	background: #e4e4e4;
 	color: #555;
+}
+
+.nav-tab,
+.nav-tab-small .nav-tab {
+	display: inline-block;
+	margin: -4px 4px -1px 0;
+	padding: 5px 14px;
 	font-size: 12px;
 	line-height: 16px;
-	display: inline-block;
-	padding: 4px 14px 6px;
 	text-decoration: none;
-	margin: -4px 4px -1px 0;
 }
 
-.nav-tab:hover {
+.nav-tab:hover,
+.nav-tab:focus {
 	background-color: #fff;
 	color: #464646;
 }
@@ -1976,7 +1981,8 @@
 }
 
 .nav-tab-active,
-.nav-tab-active:hover {
+.nav-tab-active:hover,
+.nav-tab-active:focus {
 	border-bottom: 1px solid #f1f1f1;
 	background: #f1f1f1;
 	color: #000;
@@ -1993,7 +1999,7 @@
 h1 .nav-tab,
 h2 .nav-tab {
 	padding: 6px 10px;
-	font-weight: bold;
+	font-weight: 600;
 	font-size: 15px;
 	line-height: 24px;
 }
Index: src/wp-admin/network/site-info.php
===================================================================
--- src/wp-admin/network/site-info.php	(revision 34692)
+++ src/wp-admin/network/site-info.php	(working copy)
@@ -138,7 +138,7 @@
 <div class="wrap">
 <h1 id="edit-site"><?php echo $title; ?></h1>
 <p class="edit-site-actions"><a href="<?php echo esc_url( get_home_url( $id, '/' ) ); ?>"><?php _e( 'Visit' ); ?></a> | <a href="<?php echo esc_url( get_admin_url( $id ) ); ?>"><?php _e( 'Dashboard' ); ?></a></p>
-<h3 class="nav-tab-wrapper">
+<h2 class="nav-tab-wrapper nav-tab-small">
 <?php
 $tabs = array(
 	'site-info'     => array( 'label' => __( 'Info' ),     'url' => 'site-info.php'     ),
@@ -151,7 +151,7 @@
 	echo '<a href="' . $tab['url'] . '?id=' . $id .'" class="nav-tab' . $class . '">' . esc_html( $tab['label'] ) . '</a>';
 }
 ?>
-</h3>
+</h2>
 <?php
 if ( ! empty( $messages ) ) {
 	foreach ( $messages as $msg ) {
Index: src/wp-admin/network/site-settings.php
===================================================================
--- src/wp-admin/network/site-settings.php	(revision 34692)
+++ src/wp-admin/network/site-settings.php	(working copy)
@@ -95,7 +95,7 @@
 <div class="wrap">
 <h1 id="edit-site"><?php echo $title; ?></h1>
 <p class="edit-site-actions"><a href="<?php echo esc_url( get_home_url( $id, '/' ) ); ?>"><?php _e( 'Visit' ); ?></a> | <a href="<?php echo esc_url( get_admin_url( $id ) ); ?>"><?php _e( 'Dashboard' ); ?></a></p>
-<h3 class="nav-tab-wrapper">
+<h2 class="nav-tab-wrapper nav-tab-small">
 <?php
 $tabs = array(
 	'site-info'     => array( 'label' => __( 'Info' ),     'url' => 'site-info.php'     ),
@@ -108,7 +108,7 @@
 	echo '<a href="' . $tab['url'] . '?id=' . $id .'" class="nav-tab' . $class . '">' . esc_html( $tab['label'] ) . '</a>';
 }
 ?>
-</h3>
+</h2>
 <?php
 if ( ! empty( $messages ) ) {
 	foreach ( $messages as $msg )
Index: src/wp-admin/network/site-themes.php
===================================================================
--- src/wp-admin/network/site-themes.php	(revision 34692)
+++ src/wp-admin/network/site-themes.php	(working copy)
@@ -143,7 +143,7 @@
 <div class="wrap">
 <h1 id="edit-site"><?php echo $title; ?></h1>
 <p class="edit-site-actions"><a href="<?php echo esc_url( get_home_url( $id, '/' ) ); ?>"><?php _e( 'Visit' ); ?></a> | <a href="<?php echo esc_url( get_admin_url( $id ) ); ?>"><?php _e( 'Dashboard' ); ?></a></p>
-<h3 class="nav-tab-wrapper">
+<h2 class="nav-tab-wrapper nav-tab-small">
 <?php
 $tabs = array(
 	'site-info'     => array( 'label' => __( 'Info' ),     'url' => 'site-info.php'     ),
@@ -156,7 +156,7 @@
 	echo '<a href="' . $tab['url'] . '?id=' . $id .'" class="nav-tab' . $class . '">' . esc_html( $tab['label'] ) . '</a>';
 }
 ?>
-</h3><?php
+</h2><?php
 
 if ( isset( $_GET['enabled'] ) ) {
 	$enabled = absint( $_GET['enabled'] );
Index: src/wp-admin/network/site-users.php
===================================================================
--- src/wp-admin/network/site-users.php	(revision 34692)
+++ src/wp-admin/network/site-users.php	(working copy)
@@ -198,7 +198,7 @@
 <div class="wrap">
 <h1 id="edit-site"><?php echo $title; ?></h1>
 <p class="edit-site-actions"><a href="<?php echo esc_url( get_home_url( $id, '/' ) ); ?>"><?php _e( 'Visit' ); ?></a> | <a href="<?php echo esc_url( get_admin_url( $id ) ); ?>"><?php _e( 'Dashboard' ); ?></a></p>
-<h3 class="nav-tab-wrapper">
+<h2 class="nav-tab-wrapper nav-tab-small">
 <?php
 $tabs = array(
 	'site-info'     => array( 'label' => __( 'Info' ),     'url' => 'site-info.php'     ),
@@ -211,7 +211,7 @@
 	echo '<a href="' . $tab['url'] . '?id=' . $id .'" class="nav-tab' . $class . '">' . esc_html( $tab['label'] ) . '</a>';
 }
 ?>
-</h3><?php
+</h2><?php
 
 if ( isset($_GET['update']) ) :
 	switch($_GET['update']) {