openecomp-ui/resources/scss/components/_punchOut.scss

&.dox-ui-punch-out {
  background-color: $content-background-color;
}

&.dox-ui-punch-out.dox-ui-punch-out-full-page {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  overflow-y: auto;
}