themes-wordpress/kigen/templates/404.html

<!-- wp:template-part {"slug":"header","tagName":"header"} /-->

<!-- wp:group {"tagName":"main","style":{"spacing":{"margin":{"top":"var:preset|spacing|80","bottom":"var:preset|spacing|80"}}},"layout":{"type":"constrained"}} -->
<main class="wp-block-group" style="margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)">
	<!-- wp:pattern {"slug":"kigen/404"} /-->
	<!-- wp:pattern {"slug":"kigen/search"} /-->
</main>
<!-- /wp:group -->

<!-- wp:template-part {"slug":"footer","tagName":"footer"} /-->