.portrait-window {
  position: relative;
  background: #071a34 url("assets/mark-carlson-rsdg.jpeg") left top / auto 169% no-repeat;
}

.portrait-window img {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

@media (max-width: 600px) {
  .portrait-window {
    background-size: auto 169%;
  }
}