Hi there,
Ah you mean apply it using php code without adding specific ID to the css?
You can add this at your functions.php
add_action('wp_head', 'selective_custom_css', 9999);
function selective_custom_css () {
$page_ids = array ( 6, 7, 8, 9, 10);
if ( in_array( get_the_ID(), $page_ids ) ) : ?>
<style>
.x-navbar-fixed-left-active {
padding-right: 168px;
padding-left: 0;
}
.x-navbar-fixed-left {
left: auto;
right: 0;
}
</style>
<?php endif; }
Hope this helps.