Hello,

I'm using Gantry 5 with CALLISTO Template.
The home page is configured like this :
- Blog 2 columns

In a screen, I could have 2 columns : OK
If I see the home page with a smartphone, with a responsive template, I have to see all content in ONE column. In fact I have 2 columns.

You could see :
www.maqeflslrda.concept-siteweb.com/
www.maqeflslrda.concept-siteweb.com/le-blog-actualite.html

With older template using Gantry 4, it was responsive 1 column with smartphone.

Thank you for your help !
Eric

/** Small Screen Mobile Modes **/
@media only screen and (max-width: 480px) {
    .blog .span6 {
        float: left !important;
        width: 100% !important;
    }
}