First off, great job. Here are some things I saw.
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you should add drop shadows to your images that way it gives an easy 3d look.
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I think that you should add an email contact in your footer. Here is a post I made on how to do it with your own host or use FormSpree.
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I think that you should darken your background color so that your white boxes stand out better. For general coloring and for accessibility issues you need to have at least a 4:5 ratio of color difference. Use this to help.
Great job and keep it up!