Columns not working with ActiveMaterial

[silvermind]

Hi

I've a lot of customized view in active admin using this code:

div class: 'blank_slate_container', id: 'dashboard_default_message' do
  columns do
    column do
      para "LEFT"
    end
    column do
      para "RIGHT"
    end
  end
end

using active_material the columns are not side by side, but below each other:

Active Admin is rendering this code, with inline styles:

As I'm new to the material design, is there some replacement for a two column layout?