div.macbook-mockup{
  position:relative;
  max-width:1000px;
  margin:20px;
}

.macbook-mockup img.device{
  width:100%;
  height:auto;
}

.macbook-mockup .screen{
  position:absolute;
  width:76%;
  height:82.5%;
  top:6.5%;
  border-radius:4px;
  left:12%;
  background-color:#aaa;
  overflow:hidden;
  background:url(../../assets/img/screen-content-macbook.jpg);
  background-size:cover;
  background-position:center;
}

.macbook-mockup .screen:before{
  content:'';
  background-color:#fff;
  position:absolute;
  width:70%;
  height:140%;
  top:-26%;
  right:-39%;
  transform:rotate(-19deg);
  opacity:0.1;
}