A few links I found interesting and would like to share with you :
- The CSS/JS/HTML framework Boostrap (initiated and used by Twitter) is released in his 3rd version with a huge amount of rewrite, improvements, more mobile first oriented, etc. You can use it only if you do not plan to have people using IE7. But who still uses this prehistorical browser (execpt France ??)
- Remember also that id & classes were created for HTML first for itself and then were used by CSS to apply style and not the opposite ; Read this article (in French) for the full version on this.