.panel{

  width: 33%;
  float: left;
  position: relative;
  overflow-y: auto;
  height: calc(100vh - 115px);

}

.panel::-webkit-scrollbar { width: 0 !important }

.panel .option{

  width: 100%;
  padding: 25px;
  border: solid black 1px;
  text-align: center;
  margin-bottom: 5px;
  box-sizing: border-box;
  cursor: pointer;

}