Make page full width

Hi there. I would be very grateful for some help. I’ve also posted this in the theme forum in case it is theme specific but I think it may be something easily fixed by adding a bit of CSS, however I’m not sure. My page is not displaying as full width even though it used to. I didn’t change anything.. The only thing that’s changed is a slider that I added (smart slider). Can anyone advise me how to make my site full width without that blue border around the edge?? Many thanks

The page I need help with: [log in to see the link]