Custom Logo on Fullscreen theme in different positions

I currently have the fullscreen theme installed and i was able to upload my custom logo in replacement of the generic title option. However the logo is centered and positioned differently in different web browsers. I based my coding off internet explorer so the logo is centered on my website snap-factory.com when using internet explorer. However when using mozzilla, chrome or safari the logo is no longer centered and is all out of wack and placed lower than usual. Has anyone ever had this problem if so, any help on the matter would do me great.

heres the code for the css style for the header and background

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Here is the code for the header.php.

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Let me know if there is anything in the code i can change or anything else i can do about this. Thanks in advanced