The menu you posted isn’t exactly a dropdown as all the links are visible.
When you say ‘inline’…what do you mean?
Did you mean something like this – http://codepen.io/Paulie-D/pen/22c4ca602bda363099133ded6bca2294
By the way…I see you have an element called
navigation…as far as I know there is no such element.
Did you mean
nav which is an official HTML5 element?