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img.fullsizebackground{
  /* Set rules to fill background */
  min-height: 100%;
  min-width: 1024px;
  @include opacity(.3);

  /* Set up proportionate scaling */
  width: 100%;
  height: auto;

  /* Set up positioning */
  position: fixed;
  top: 0;
  left: 0;
  z-index: -9999;
}