Its running down by the fuse panel cover for sure. So sun roof?Is the carpet underneath wet? Anything on the a pillar, if you pull it down or on the fuse panel cover? If it on the a pillar might be a sunroof drain leak. If it seem to be coming up though the floor check the frame rail drains underneath.
sunroof drains and / or cowl drains. I would check the cowl drains first as they are a lot easier to check.