Here I should comment on the mobile version of the catalog. It is the first of my projects to have a portable version. Many mobile gadgets are now being offered, and some of them have difficulty opening or displaying large pages.
The picture you see on the website was produced using the standard Android web browser. (I also use Opera Mini, whose image is not so good but better than nothing!) In fact, only one version (html+css) was used for the catalog. Since a browser adapts fonts and elements to fit a particular window, you should experiment with your desktop web browser. Try to make a smaller window, which will change the layout so that everything is rendered in one column.
This "responsive web-design" is really cool, and it works for three class of devices: desktop, mobile, and tablet.