body[data-theme*=classic]:before {
  content: "";
  position: absolute;
  top: 52%;
  transform: translateY(-52%) rotate(177deg);
  left: 0;
  right: 0;
  margin: 0 auto;
  width: 63em;
  height: 63em;
  z-index: -1;
  background: url(../images/big/auth-bg1.svg) no-repeat center center;
  background-size: contain;
}