Front end

I'm just going to give you one feedback, which is:

When you want to make something align center, try to make one class, that makes all the stuff inside it in center.

You can try to make e.g. .wrap or .container with margin: 0 auto, with width say max-width 1000px, width 80% . instead of div to have padding and stuff like that.

Try to not repeat your self, keep your code DRY. I see you ahve few code stuff that repeat it's self. Instead you could make e.g. padding-tb-50 , that s a class that will give a padding of 50px top and bottom, you need to write the value obeviously.

Anywas, you should use section html5 tag, instead of divs. look for HTML5 markup in google. I know Guil didn't show them there. You could then try experiment to set the section to have padding 50px 0, and margin 50px 0 or whatever you want.

Hope this helps somewhat.

Good job though.

And alwasy start (for most cases) with mobile first, so you start writing your layout to suit mobile