index.html:20 Uncaught ReferenceError: units is not defined at index.html:20
So since I don't really understand the basic CSS grid/ layout system, I decided to try and build a simple header-main-sidebar-footer type of layout.
So I tried following this: http://vanseodesign.com/css/2-column-layout-code/
I tried building it again by myself this time, and this is for far I got:
Why in the world does my main section overlap like that over the header section?