Custom CSS Work For Responsive Logo Linguini Theme

I am working on a website for a restaruant. I've tried as much as I could to get the logo to be responsive, but I am unable to. I am looking for someone to just make the logo in the header responsive, that's all that I need done. When viewed on smaller devices the logo gets cut off and I would like to know how to make it auto resize down to a smaller one. This issue is most important to me. If possible, how would I move the logo and navigation down so that it isn’t up so high? This issue isn’t as critical as the other one. And the results can be viewed here: [login to view URL] The theme is Linguini on WordPress.