themes-wordpress/lineup/parts/header.html

<!-- wp:group {"style":{"spacing":{"padding":{"top":"0","right":"var:preset|spacing|50","bottom":"var:preset|spacing|50","left":"var:preset|spacing|50"}}},"layout":{"type":"default"}} -->
<div class="wp-block-group" style="padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)">
	<!-- wp:group {"style":{"spacing":{"blockGap":"var:preset|spacing|40"}},"layout":{"type":"flex","justifyContent":"space-between"}} -->
	<div class="wp-block-group">
		<!-- wp:site-title /-->

		<!-- wp:navigation {"overlayBackgroundColor":"base","overlayTextColor":"contrast","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right","orientation":"horizontal"},"style":{"spacing":{"margin":{"top":"0"},"blockGap":"var:preset|spacing|40"}}} /-->
	</div>
	<!-- /wp:group -->
</div>
<!-- /wp:group -->