#header {
  background-color: #2d2d2d;
  color: white;
  text-align: center;
}
#result_image
{
    width:100%!important;
}
.submit {
  height: 8%;
  line-height: 10%;
  text-align: center;
  margin: 2%;
}

#droppable-zone {
  border: 10px dashed #007bff66;
  height: 44%;
  width: 97%;
  position: relative;
  overflow: hidden;
}

#droppable-zone.hover {
  border: 10px dashed #aaa;
}

#droppable-zone-wrapper {
  display: table;
  height: 100%;
  width: 100%;
}

#droppable-zone-text {
  display: table-cell;
  text-align: center;
  vertical-align: middle;
  font-size: 33px;
  overflow: hidden;
}

.droppable-file {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  height: 100%;
  width: 100%;
  cursor: pointer;
}
@media screen and (max-width: 767px) {
    #droppable-zone {
        border: 10px dashed #007bff66;
        height: 80%;
        width: 97%;
        position: relative;
        overflow: hidden;
    }

}
@media only screen and (min-device-width: 768px) and (max-device-width: 968px) and (orientation:landscape) {
  /* For portrait layouts only */
  #droppable-zone {
        border: 10px dashed #007bff66;
        height: 50%;
        width: 97%;
        position: relative;
        overflow: hidden;
    }
}