themes-wordpress/aldente/templates/404.html

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

<!-- wp:group {"tagName":"main","style":{"spacing":{"margin":{"bottom":"var:preset|spacing|70"}}},"layout":{"type":"constrained"}} -->
<main
	class="wp-block-group"
	style="margin-bottom: var(--wp--preset--spacing--70)"
>
	<!-- wp:columns {"align":"wide","style":{"spacing":{"blockGap":{"left":"9%"}}}} -->
	<div class="wp-block-columns alignwide">
		<!-- wp:column {"width":"70%"} -->
		<div class="wp-block-column" style="flex-basis: 70%">
			<!-- wp:pattern {"slug":"aldente/404"} /-->
		</div>
		<!-- /wp:column -->

		<!-- wp:column {"width":"30%","layout":{"type":"default"}} -->
		<div class="wp-block-column" style="flex-basis: 30%">
			<!-- wp:template-part {"slug":"sidebar","tagName":"aside"} /-->
		</div>
		<!-- /wp:column -->
	</div>
	<!-- /wp:columns -->
</main>
<!-- /wp:group -->

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