Help: Overwritten style.css in main wordpress directory

Hi all,

Stupidly I didn’t notice that the ftp client had disconnected/reconnected and switched back to the default directory while I was making changes, I click across automatically upload style.css overwriting the existing and now I can’t find a backup.

Is there anywhere I can get hold of the style.css which is inside the base directory for wordpress (the main parent directory)?

Thanks,

Andy