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:#fff;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:#fff;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:700;background-color:#fff;border-color:gray}