themes-wordpress/varia/template-parts/header/site-branding.php

<?php
/**
 * Displays header site branding
 *
 * @package WordPress
 * @subpackage Varia
 * @since 1.0.0
 */
?>
<div class="site-branding">

	<?php if ( has_custom_logo() ) : ?>
		<div class="site-logo"><?php the_custom_logo(); ?></div>
	<?php endif; ?>
	<?php $blog_info = get_bloginfo( 'name' ); ?>
	<?php if ( ! empty( $blog_info ) ) : ?>
		<?php if ( is_front_page() && is_home() ) : ?>
			<h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>
		<?php else : ?>
			<p class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></p>
		<?php endif; ?>
	<?php endif; ?>

	<?php
	$description = get_bloginfo( 'description', 'display' );
	if ( $description || is_customize_preview() ) :
		?>
			<p class="site-description">
				<?php echo $description; ?>
			</p>
	<?php endif; ?>
</div><!-- .site-branding -->