Bulma doesn't load css

[Gil]

Just add xui to a new nuxt project. I added the module and the css in the nuxt.conf.js.

css: [
    '@/assets/main.sass',
    { src: 'font-awesome/scss/font-awesome.scss', lang: 'scss' }
  ],
modules: [
    'xui-module'
  ]

When I try to load a simple hero section (copy/paste example from bulma documentation) I don't have the attended result.

There is anything to add ?

PS: Also you can add the little fix for bulma's warning about postcss in your how-to ;)