vyos-documentation/docs/_static/css/installation/running-on-bare-metal.css

.toctree-l1 {
  background-color: transparent;
}

.current > .current > .internal {
  background-color: #fff;
  color: #FD8F01;
  border: transparent;
  padding: 11px 12px 11px 28px;
  border: none !important;
}