Blurry logo on mobile version

Hello.
I’m using a child theme for Fluida.
On the desktop version of my website the logo appears ok, but in the mobile version is a little bit blurry.
I tried changing the resolution of the logo: if I made it higher, the logo is fine on the mobile and worst on desktop. I thought about loading the logo in both the resolutions, and making the site use the right one depending on the size of the screen, but I’m actually not totally sure on how to do it.
Any idea on how to solve this?

Thanks a lot.

Website: www.pmintimo.it