Avenue: CSS to center JUST the footer?

Site URL: http://appalachianfineart.com

I am going mad trying to figure out a CSS code that works to center JUST my footer in the Avenue template. I have already gone through most of this forum and tried other CSS snippets and none worked. I want the header to remain as-is, but the footer which contains my newsletter subscription box is squished to the left. I would like for it to be centered. Can anyone help???

Thanks so much!!!

Jaime

I have absolutely no idea how to code, but I have been messing around and this seems to have somewhat centered my content. It isn't perfect and the right side slides off a bit - so if someone can help me tweak it I would be grateful. But I am posting in case anyone else is frustrated like me and needs a patch:

.newsletter-block {
  position: relative;
  width: 180% !important;
}
.sqs-block {
  position: relative;
  width: 180% !important;
}