Moving my page/blog to Centre

Hello,

I have disabled the Widget Bar from my one-page site using CSS. That’s what I added:

#sidebar {
display: none;
}

The rest of the blog/page (the body) remained on the left. I would like to centre it and completely remove the Widget Bar and not only hide it. This to allow me to expand the width of my page as much as I want.

Help appreciated.

Site is: https://www.faisalirshaid.com