Fluid 2-column layout

When added to the xy.css matrix, a few lines of CSS produce what you see here: a concise 2-column layout with the following features:

Features of xy.css

As seen in the next column, only a few lines of CSS are needed for this basic 2-column layout. That code should work fine as-is, but when added to the xy.css matrix, it’s like building with liquid lego blocks. You just start snapping layout items into place and let the CSS matrix work the magic.