base64 encode page background. #453
Remove nested selector.
Restructure CSS to SMACSS.
Use consistent media query syntax.
Make the 'N' into the link.
Move skipnav into an include.
Provide more room for optional site affiliation.
Switch from `menu` to avoid consistent validation warning.
Crush the png
Base64 encode the image. #453
Add carrot to indicate selected breadcrumb. Close #455