An Exercise in Modern HTML and CSS
http://adftw.jeremyheminger.com/
When I began building websites the idea of viewing it on a mobile device wasn't thought of or even possible. If there was any thought given to various display resolutions it was mostly solved by adding percents to the containing columns of a table and nesting that table within a table set at a maximum width with the most common resolution. I think that was about 1024 x 768 but it might have even been 640 x 480.