Nice and simply site for wordpress fans! I like your animation effects and the simplicity of your design. I found one little "bug". You have to pu the footer at the end of the page, with position:fixed in some occasions, or by setting some min-height at the main content. For example, at the page "http://www.wordpressdergisi.com/en/category/starting-manual/" the footer is at the middle of my screen, cause the content has not big height.
I like your website, it very simple and clean. Maybe the buttons from the main navigation need to be a little bigger and cancel that pop-up window, it`s annoying.