First of all... this is beautiful. I tried MANY different themes and I love the simplicity of your work.
I have one question though. At the top, in place of site name & tagline, I'd prefer to have an image. In the options setting you have this labeled as "site logo" but there are no recommended dimensions. I noticed you answered this question about the header image but since this is the logo section, I am assuming the size is a smaller width?
I'd like it to look good on small screens as well, and it would be great if it would look good on retina displays as well. Is this even possible? And would you recommend a .png or .jpg?
Thank you kindly,