移动设备上的站点缩放

Im a total newbie as far as mobile devices are concerned. Anyhow, i created a webpage (still under construction) and implemented it on the existing wp theme called govpress (yes, i know it might not be the most practical way to make things happen but with my coding skills it was the easiest). Now i just cant get it working correctly with mobile devices. I havent found the code that makes it behave as it does. So, on a mobile it seems to scale the page to screen width resolution of the device(?). Also the background and the header div (full width) scales to device screen width. And even if i zoom out it doesnt enlarge the bg nor the header div. Is it the theme that has this behavior somewhere coded or is it somewhere in the css..!? Heeeelp, please!!!Im a total newbie as far as mobile devices are