body {
  font-family: arial;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  user-select: none; }

.header {
  margin: 5px; }

button:focus {
  outline: 0; }

.main_window {
  padding: 5px;
  border: 1px solid gray;
  overflow: hidden;
  background-color: #fafafa;
  text-align: left; }

.top_pane {
  width: 100%; }

.eef_pane, .opa_pane {
  float: left;
  width: 50%; }

#avail_list, .sel_list {
  margin: 5px;
  padding: 5px 0 0 5px;
  border: 1px solid gray;
  background-color: white;
  min-height: 47px; }

#avail_list div {
  display: inline-block; }

.draggable {
  position: relative;
  cursor: default;
  margin: 0 5px 5px 0;
  border: 1px solid gray;
  padding: 5px !important;
  list-style-type: none;
  background-color: white;
  min-height: 20px; }

.dragOver {
  background-color: #e8e8ff !important; }

.correct {
  color: green; }

.error {
  color: red; }

.button_group {
  display: block;
  text-align: center;
  clear: both;
  padding: 5px 0; }

#grade_button, #reset_button {
  width: 150px;
  padding: 5px;
  font-size: 16px;
  margin: 3px;
  font-weight: bold;
  background-color: white;
  border-color: gray; }