Scrollable part of a plan

[admin]

This should provide something similar. You need to enable dark theme in Utilities > Vis. configuration. Use levels for grouping.

Code:

.usermode .menu {
  background: #7E7E7E;
}

.usermode .nav-main .icon {
  display: none !important;
}

.usermode .nav-main li .a,
.usermode .nav-main li .a:hover {
  text-transform: uppercase;
  background: #3B3B46 !important;
  color: #E4E4E4 !important;
  padding: 16px 8px;
  border-radius: 0;
  text-align: center;
  box-shadow: none !important;
  font-size: 16px;
}

.usermode .nav-main li.disabled .a {
    color: #989898 !important;
  font-weight: bold;
}

.usermode .nav-main li.active .a {
  background: transparent !important;
  font-weight: bold;
}