#main-content {
  position: relative;
  height: calc(100% - 60px);
  .left-panel {
    float: left;
    width: 200px;
    height: 100%;
    background: #fff;
    border-right: 1px solid #eee;
    padding-top: 20px;
    box-sizing: border-box;
    overflow: scroll;
  }
  .right-panel {
    overflow: hidden;
    height: 100%;
    padding: 20px;
    box-sizing: border-box;
  }
}