header {
  background-image:   -webkit-linear-gradient(rgba(0,0,0, 0) 0%,rgba(0,0,0, 1) 100%), url(../../assets/atelier.jpg);
  background-image:   -moz-linear-gradient(rgba(0,0,0, 0) 0%,rgba(0,0,0, 1) 100%), url(../../assets/atelier.jpg);
  background-image:   -o-linear-gradient(rgba(0,0,0, 0) 0%,rgba(0,0,0, 1) 100%), url(../../assets/atelier.jpg);
  background-image:   -ms-linear-gradient(rgba(0,0,0, 0) 0%,rgba(0,0,0, 1) 100%), url(../../assets/atelier.jpg);
  background-image:   linear-gradient(rgba(0,0,0, 0) 0%,rgba(0,0,0, 1) 100%), url(../../assets/atelier.jpg);

  background-size:     cover;
  background-repeat:   no-repeat;
  background-position: center center;
}