/* HEADER WITH HERO + WATERMARK */
header {
  position: relative;
  text-align: center;
  padding: 60px 20px;
  background: url('../images/hero-bg.jpg') center/cover no-repeat;
}
header::before {
  content: '';
  position: absolute;
  top:0; left:0; right:0; bottom:0;
  background: rgba(0,0,0,0.6);
  z-index: 0;
}
header::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 300px; height: 300px;
  background: url('../images/squareimage.png') center/contain no-repeat;
  transform: translate(-50%, -50%);
  opacity: 0.1;
  z-index: 0;
}
header > * {
  position: relative;
  z-index: 1;
}