Blog Post with Sidebar right and after clicking on the header in fullsize

Hey sunshineh!

Please add following code to Functions.php file in Appearance > Editor

function add_custom_script(){
?>
<script>
jQuery(window).load(function(){
jQuery( '#header' ).click(function() {
  jQuery( '.single-post .nine.units' ).css('width', '100%').css('border', 'none');
  jQuery( '.single-post .sidebar' ).css('display', 'none');
});
});
</script>
<?php
}
add_action('wp_footer', 'add_custom_script');

Regards,
Yigit