Why does my webpage have unwanted whitespace on the right? [on hold]

As you can see below, my webpage has an unwanted whitespace on the right. I'm not sure whats causing the problem. I think it's the max-width I have set to 1440px. I haven't worked on the responsiveness of it yet. Thank you.

HTML code here : http://ift.tt/2eSGROV

CSS here : http://ift.tt/2gBs9PK