.div_center {
    margin: auto;
    width: 50%;
    border: 3px solid green;
    padding: 10px;
  }

.tab {
  display: none;
}

.sidebar-content {
  background-color: #fe702c;
}

.sidebar-link, a.sidebar-link {
  background: #9c59386b;
}

.highlight {
  background-color: #f195ff6b !important;
}