html, body {
  width: 100%;
  height: 100%;
  margin: 0;
}

.sidebar {
  height: 100%;
  max-height: 100%;
  overflow: auto;
}

.fail {
  color: red;
}

.sucess {
  color: green;
}

.subnav {
  display: none;
  max-height: 500px;
  overflow: auto;
  margin-left: 15px;
  border-left: gray 3px solid;
}