“The web’s greatest strength, I believe, is often seen as a limitation,as a defect. It is the nature of the web to be flexible, and it should be our role as designers and developers to embrace this flexibility and produce pages which, by being flexible, are accessible to all.”
The Lonely Planet styleguideis a top-notch example of what a styleguide should be: thorough, utilitarian, easy to navigate and downright obssesed with every detail.