I have made a logo in Photoshop which I want to use in a banner for a website. A small problem, however, is that I made the logo way too large (I figured that if I would make the logo large enough, I would always have a sharp image). I now know that's not the case and I'm stuck with a logo which has a height of about 100cm and I cannot figure out how to resize it so that it fits in a banner with a height of 300 pixels without drastically losing quality. Is there any way this can be done? Or should I just start over creating a logo of a more moderate size?