New to Html can you help me with my website

[Yarra]

www.icypixel.net <---- My website

So the homepage on different computers is resized for some reason. On Macs it's perfect. But on iPads and PCs the homepage looks zoomed in and misplaced.

My CSS is below.

http://pastebin.com/A7mKcqFA

The code tags were not working so I had to use pastebin sorry for the inconvenience.

So basically how do I make it so everything resizes to the appropriate resolution to the computer I guess.

Thanks in advance

[JorgeM]

I visited your site using Chrome on a PC... didnt find any obvious issues. What exactly do you see happening on the different browsers.

[Yarra]

The bottom bar overlaps the main logo. Sometimes the buttons are not visible. Gone off margin for instance.