html {
  height: 100%;
  width: 100%;
  padding: 0px;
  margin: 0px;
  position: fixed;
}

body {
  height: 100%;
  padding: 5px;
  margin: 0px;
}

#drop_zone {
  border: 2px dashed #bbb;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
  padding: 25px;
  text-align: center;
  font: 20pt bold;
  color: #bbb;
  height: 92%;
}