So you’ve been working for months on the new version of your Website? I guess you’re pretty sure that the day this new version will go online will be a very important date for the users, for your customers, or for the Web, maybe. But it won’t. The day your new version goes online is not an ending but the beginning of a story with your users.

DRY – don’t repeat yourself – is one of the basic principles of programming. The two main concepts allowing you to avoid repetitions in programming are variables and functions.

Question is: how can we think DRY with a language which does not have variables or functions?

“Think outside of the box”: here is an enigmatic title!

However, it is one of our greatest challenges as CSS developers: abstracting us from our environment and even from our own senses that can… set up some vicious traps.