body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f6f6f6;
}

.wrapper {
    display: flex;
    width: 90%;
    height: 90%;
}

.left-column  {
    display: flex;
    flex-direction: column;
    justify-content: start;
    flex-wrap: wrap;
    width: 30%;
    height: 100%;
}

.right-column  {
    width: 70%;
}
.non-draggable {
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
}

/*
.center-column {
    display: flex;
    flex-direction: column;
    justify-content: start;
    width: 40%;
    height: 100%;
}

.center-row {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    width: 100%;
}


#result {
  margin:10px;
}


.drophl {
  border: 2px dashed green;
}
*/

img {
    align-self: center;
    margin: 5px;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
  /*
    max-width: 128px;
    max-height: 128px;
    object-fit: cover;
    */
}

.drop-area {
    background-color: rgba(0, 0, 0, 0.1);
    align-self: start;
    width: 128px;
    height: 128px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    cursor: pointer;
}
/* Popup (modal) styles */
.popup {
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.4);
}

.popup-content {
  background-color: #fff;
  margin: 15% auto;
  padding: 20px;
  border: 1px solid #888;
  width: 256px;
  height: 256px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}

.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}