body {
  margin: 0px;
  padding: 0px;
  background-color: #ededed;
}

.cropapp {
  position: absolute;
  width: 90%;
  height: 80%;
  left: 5%;
  background: lightgray;
}

.cropbox {
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
}

img#target { max-width: 780px; }