What were the original font settings?

[Mand]

Trying to solve a readability problem with one website, I wanted to reset Cent's fonts to their default settings. There is no "return to default" option, and I can't find any information on what they were. (I always change to Calibri and fiddle with size and minimum size, just today finding out if this is why the site isn't readable for me.)

What were the original font settings? I'd rather not reset everything to its defaults if I don't have to.