Omega theme, global css and the lack of grid at global.css It seems that I misunderstood one major feature of the Omega theme. From what I see, the mobile-first basic css file  - global.css - ignores the grid layout altogether and stacks elements one over another. Am I correct, or am I missing something? Does that mean that all the zones and regions will be rendered in a top-down manner with no width control? 

I feel that my question is quite vague; I'd be most grateful links towards some relevant documentation and how-tos regarding the pure global.css design. I feel that most of the docs concentrate on structure of the zones&amp; regions, while there's little sugestions as to how to make global.css work good by itself. 
Thanks for your attention
Omega is designed as a mobile-first, breakpoint responsive theme.

global.css is the mobile first sheet, so the grid system doesn't apply.  The grid kicks in with the mytheme-alpha-default.css.

The answer for What&#39;s the difference between global.css and default.css files in Omega theme? goes into detail about the stylesheet convention.  In summary:


  
  How does my site need to look on mobile?  Make global.css
  How do things change when the grid system kicks in?  Make mytheme-alpha-default.css
  How does my site look when I am viewing it in portrait mode on a tablet?  Make mytheme-alpha-narrow.css
  How do things change when I am on a normal desktop?  Make mytheme-alpha-normal.css
  How do things change when I am on a widescreen monitor?  Make mytheme-alpha-wide.css