<?php

namespace Drupal\acme\Controller;

use Drupal\Core\Controller\ControllerBase;

class DefaultController extends ControllerBase 
{

  /**
   * hello
   * @param  string $name
   * @return string
   */
  public function hello($name) 
  {
    return [
      '#theme' => 'hello_page',
      '#name' => $name,
      '#attached' => [ 
        'css' => [
          drupal_get_path('module', 'acme') . '/assets/css/acme.css'
        ]
      ]
    ];
  }
}