karinbeng on "Make the Sight theme responsive"

I downloaded the theme Sight (that sould be responsive, like this: http://sightdemo.wordpress.com/) and created a child theme. Unfortunately, my sight-website (that you can find here: http://sh.karinbeng.se/) is not responsive at all. Do you know why and how I can change this? I would like the menu and the columns to be responsive.
Thank you in advance for your help!