Support retina top bar logo
The design looks very simple and sharp. The only thing that does look blurry is the logo. Even when you uploaded a high-resolution image it will be downsized too much to look beautiful on high-resolution devices like smartphones or PCs like MacBooks with retina.
Fix: just resize the image to 80px height. In CSS the image size is already set to 40px anyway.
Or let us use an svg like you do! ;)