<?php 
global $main_menu_options, $aria_label_header, $skip_menu_scroll, $main_menu_location;
if ( has_nav_menu( $main_menu_location ) ) : ?>
	<nav id="site-navigation" class="main-navigation" role="navigation" aria-label="<?php echo $aria_label_header; ?>">
		<?php wp_nav_menu( $main_menu_options ); ?>
        
        <a href="#content" class="menu-scroll-down"><span class="screen-reader-text"><?php echo $skip_menu_scroll; ?></span></a>
	</nav>
<?php
endif;