Origami Evergreen: Main Menu Color and Text alignment

Hello

I’m really happy with your Origami Evergreen theme but have two pre-sale questions:

– am I able to change the color of the main menu from now green to xyz through a change of the colour code in the css file?

– is it possible to align the the text of the main menu to center

– is it possible to add hover effects to the main menu?

Please note: I’m still a beginner to wordpress and css and just begining to get around (just in case the questions are utterly stupid..).

Another thing that isn’t quite clear for me: If I buy the Origami-Evergreen Theme, will the mothertheme (Origami) be included or vice versa?

Thank you very much in advance!