Add this code to your child theme functions.php file then use the class selectors below:
.loggedin
.loggedout
// LOGGED IN AND OUT BODY CLASS // ============================================================================= // Add specific CSS class by filter add_filter('body_class','er_logged_in_filter'); function er_logged_in_filter($classes) { if( is_user_logged_in() ) { $classes[] = 'loggedin'; } else { $classes[] = 'loggedout'; } // return the $classes array return $classes; }