body {
  margin: 0;
  background-color: #1e1e1e;
  color: #d0d0d0;
  font-family: 'Lucida Console', Monaco, monospace;
  text-align: center;
}
.container {
  max-width: 700px;
  width: 90%;
  margin: 0 auto;
  padding: 2rem 1rem;
}
header h1 {
  margin: 0;
  font-size: 2.5rem;
  /* color: #6cf; */
  color: #4ed126;
}
header p {
  margin: 0.5rem 0 1.5rem;
  color: #aaa;
}
.tree {
  display: block;
  text-align: left;
  font-size: 1rem;
  line-height: 26px;
  margin-top: 30px;
}
.root {
  padding-left: 12px;
  font-weight: bold;
}
.branch ul {
  list-style: none;
  padding-left: 32px;
  margin: 0;
  padding-top: 0.2rem;
}
.branch li {
  position: relative;
  padding-bottom: 0.7rem;
}
.branch li::before,
.branch li::after {
  content: "";
  position: absolute;
  left: -12px;
}
.branch li::before {
  border-top: 1px solid #444;
  top: 14px;
  width: 8px;
}
.branch li::after {
  border-left: 1px solid #444;
  height: 100%;
  top: 6px;
}
.branch ul > li:last-child::after {
  height: 8px;
}
.nodes > li:last-child {
  padding-bottom: 0.5rem;
}
.item {
  display: flex;
  align-items: center;
}
.item a {
  color: #6cf;
  text-decoration: none;
  flex: 0 0 auto;
}
.note {
  margin-left: 1rem;
  color: #888;
  flex: 0 0 280px;
  position: relative;
}
.item span {
  flex: auto;
  position: relative;
}
.item span::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 0;
  right: 0;
  border-bottom: 1px dotted #444;
}
@media (max-width: 600px) {
  .tree { width: 100%; font-size: 0.9rem; line-height: 22px; }
  .item { display: block; }
  .item span { display: none; }
  .note { margin: 0 0 0.5rem 1rem; }
}