.pageHeader {
  background-image: url(../../images/texture_lines.png);
  background-size: 4px 4px;
}

@media only screen and (-Webkit-min-device-pixel-ratio: 1.5),
only screen and (-moz-min-device-pixel-ratio: 1.5),
only screen and (-o-min-device-pixel-ratio: 3/2),
only screen and (min-device-pixel-ratio: 1.5) {
  .pageHeader {
    background-image: url(../../images/texture_lines2x.png);
  }
}