By now I have solved the issue by:

1) Copying layout.css into child-theme.
2) Changed the places with 989 to 1024.
3) And added to functions.php:
add_action( ‘wp_enqueue_scripts’, ‘wp_change_layoutcss’, 20 );
function wp_change_layoutcss() {
wp_dequeue_style( ‘avia-base’ );
wp_enqueue_style( ‘avia-base-child’, get_stylesheet_directory_uri().’/css/layout.css’ );
}

Let me know, if I could do it in any better way.

• This reply was modified 6 years, 9 months ago by racekatten.