awful css. how to do semantic row-fluid?

css is awful

@testColor: #ff0000;
section#body_content {
  #grid > .fluid > .row-fluid;
  h1#body_content_title {
    #grid > .fluid > .row-fluid;
		color: @testColor;
	}
/*	section#body {
    #grid > .fluid > .span(8);
	}
	section#side_body {
    #grid > .fluid > .span(3);
	}*/
	section#body_content_left {
    #grid > .fluid > .span(8);
	}
	section#body_content_right {
    #grid > .fluid > .span(3);
	}
}