Website appears 180 degrees rotated on iPhone

I have a pretty confusing problem. I have developed a website, which can be accessed on shooja.com . It is using zepto instead of jQuery, and GSAP for animations (Although I don't think these are related to the problem). The code is not compressed so it can be checked completely via web inspector. It appears perfectly on Firefox, Chrome, Safari on desktop and even IE. It is also OK on android browser. But on iPhone ( I have checked it on a 5 and a 5s ), it appears 180 degrees rotated and not scaled down. I can imagine the reason of scaling to be the meta tags, but the rotation doesn't make any sense. Any help is appreciated.