.headerfullheight, #fullheight-header-image {
  width: 100%;
  height: 100vh;
  max-height: 100vh;
  position: relative;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
}

.headerfullheight:before, #fullheight-header-image:before {
  background: rgba(0,0,0,0.3);
  content: "";
  left: 0;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  z-index: 1;
}

#fullheight-header-image-contenuto {
  position: relative;
  z-index: 1;
}