Enqueue de scripts e estilos

add_action('wp_enqueue_scripts', function () {
  $version = wp_get_theme()->get('Version');

  wp_enqueue_style(
    'meu-tema',
    get_stylesheet_uri(),
    [],
    $version
  );

  wp_enqueue_script(
    'meu-script',
    get_template_directory_uri() . '/assets/js/app.js',
    ['jquery'],
    $version,
    true // no rodapé
  );

  wp_localize_script('meu-script', 'MeuApp', [
    'ajaxUrl' => admin_url('admin-ajax.php'),
    'nonce'   => wp_create_nonce('meu_nonce'),
  ]);
});