Links were disabled when I conversed .key to .pdf. Links on the DEMO page: 1. Flexible Grid: http://d.alistapart.com/responsive-web-design/ex/ex-site-flexible.html 2. Partial Responsive Design: http://d.alistapart.com/responsive-web-design/ex/ex-site-mini.html 3. Responsive Design: http://d.alistapart.com/responsive-web-design/ex/ex-site-FINAL.html