padrino blog tutorial application layout

application.haml

!!! Strict
%html
  %head
    %title= "Padrino Sample Blog"
    = stylesheet_link_tag 'bulma', 'application'
    = javascript_include_tag 'jquery', 'application'
  %body
    %nav.navbar
      %div.container
        .navbar-brand
          %a.navbar-item{:href => "/"}
            %img{:alt => "Logo of Padrino blog", :src => "http://padrinorb.com/images/logo-6475397a.svg"}/
          %span.navbar-burger.burger{"data-target" => "navbarMenu"}
            %span
            %span
            %span
        #navbarMenu.navbar-menu
          .navbar-end
            = link_to 'Home', '/', {:class => 'navbar-item'}
            = link_to 'Blog', url_for(:posts, :index), {:class => 'navbar-item'}
            = link_to 'About us', url_for(:about), {:class => 'navbar-item'}
    %section.hero.is-info.is-medium.is-bold
      .hero-body
        .container.has-text-centered
          %h0.title
            An example blog created with Padrino
    %div.container
      #main= yield