public function __construct() {
    add_action('init', [$this, 'register_quiz_meta']);
    add_action('rest_api_init', [$this, 'register_rest_fields']);
    add_action('wp_enqueue_scripts', [$this, 'enqueue_assets']);
}

public function enqueue_assets() {
    wp_enqueue_script(
        'mocktest-script',
        plugin_dir_url(__FILE__) . '../assets/js/script.js',
        ['jquery'],
        filemtime(plugin_dir_path(__FILE__) . '../assets/js/script.js'),
        true
    );

    wp_localize_script('mocktest-script', 'wpnm_vars', [
        'ajax_url' => admin_url('admin-ajax.php'),
        'nonce' => wp_create_nonce('wpnm_quiz_nonce'),
        'answer_required' => __('Please select an answer', 'wp-national-mocktest'),
        'next_text' => __('Next', 'wp-national-mocktest'),
        'finish_text' => __('Finish', 'wp-national-mocktest'),
        'submission_error' => __('Error submitting quiz', 'wp-national-mocktest'),
        'time_warning' => __('Time is running out!', 'wp-national-mocktest'),
        'confirm_submit' => __('Are you sure you want to submit?', 'wp-national-mocktest'),
        'confirm_leave' => __('You have unsaved changes. Are you sure you want to leave?', 'wp-national-mocktest')
    ]);

    wp_enqueue_style(
        'mocktest-style',
        plugin_dir_url(__FILE__) . '../assets/css/style.css',
        [],
        filemtime(plugin_dir_path(__FILE__) . '../assets/css/style.css')
    );
}