center aligning a fixed position div

Question

I\'m trying to get a div that has position:fixed center aligned on my page.

I\'ve always been able to do it with absolutely positioned divs using this \

Answer 1

I used the following with Twitter Bootstrap (v3)

    

        
Stuff - rows - cols etc
    

I.e make a full width element that is fixed position, and just shove a container in it, the container is centered relative to the full width. Should behave ok responsively too.