Suggestion: hide sidebar when no widgets are active

At this moment when the main sidebar has no active widgets the div is still there and the single-post and blog page still have an empty space on the position of the sidebar.

With a simple change the content on those pages could go full-width.

this would be sufficient:

content.php

<?php get_sidebar();
        
        if (is_active_sidebar('sidebar-1')) { 
	        echo'<div class="col-md-9 col-sm-8 col-xs-12">';
	    } else { 
	    	echo'<div class="col-md-12 col-sm-12 col-xs-12">';
		}
		?> 

sidebar.php

if (is_active_sidebar('sidebar-1')) {
?>
	
<div class="col-md-3 col-sm-4 col-xs-12 main-sidebar filter_category">
	<?php dynamic_sidebar('sidebar-1'); ?>
</div>

<?php
}