<style> html { display: flex; width: 100vw; height: 100vh; justify-content: center; align-items: center; } .page-content h2 { text-align: center; font-size: 18px; font-family: sans-serif; color: #636b6f; } body { display: contents; } </style> <div id="primary" class="content-area"> <div id="content" class="site-content" role="main"> <header class="page-header"> <h1 class="page-title"><?//php _e( 'Not Found', 'twentythirteen' ); ?></h1> </header> <div class="page-wrapper"> <div class="page-content"> <h2><?//php _e( 'This is somewhat embarrassing, isn鈥檛 it?', 'twentythirteen' ); ?></h2> <h2>404 | Not Found</h2> <!-- <p><?//php _e( 'It looks like nothing was found at this location. Maybe try a search?', 'twentythirteen' ); ?></p> --> <?//php get_search_form(); ?> </div><!-- .page-content --> </div><!-- .page-wrapper --> </div><!-- #content --> </div><!-- #primary --> <?//php get_footer(); ?>