Is there a way to center the content?

[neurothew]

First of all, thank you very much for the great project, it helped a lot in setting up my own blog.

In the default template, the content was biased to the left hand side of the screen, I am wondering if it is possible to move it to the center (just like every posts that we saw in medium?), with the navigation bar remain fixed?

Please look at the picture for clearer description, I would like to move the content to the red rectangle location such that the margin to the left and right are equal.

Thank you very much! Any help would be greatly appreciated.