Header right menu not well on tablet.

Hello Sakin, Two days ago you provide me with CSS to get the header right menu to the left site. This worked fine, until I look the website on the tablet in landscape. The header right menu was on the right site again and stacked. You can see it here or on the website: staging.toerfietsleusden.nl Is there a solution for it? Kind regards and have a nice weekend Hans Hagmeijer