404.php

<?php
/**
 * The template for displaying 404 pages (Not Found).
 *
 * @package WordPress
 * @subpackage Cornerstone
 * @since Cornerstone 1.0
 */

get_header(); ?>

<div class="row">
	<div id="primary" class="site-content small-12 mediums-12 columns">
		<div id="content" role="main">
			<article id="post-0" class="post error404 no-results not-found">

				<header class="entry-header">
					<h1 class="entry-title"><?php _e( 'This is somewhat embarrassing, isn&rsquo;t it?', 'cornerstone' ); ?></h1>
				</header>

				<div class="entry-content">
					<div data-alert class="alert-box">404!</div>
					<p><?php _e( 'It seems we can&rsquo;t find what you&rsquo;re looking for. Perhaps searching can help.', 'twentytwelve' ); ?></p>
					<?php get_search_form(); ?>
				</div>

			</article>
		</div>
	</div>
</div>

<?php get_footer(); ?>