.timeline {
  border-left: 2px solid #bbb;
  margin: 2rem 0;
  padding-left: 1rem;
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 1rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #3498db;
}

.timeline-item h3 {
  margin: 0 0 0.2rem 0;
}

.timeline-item .sub-title {
  font-size: 0.9rem;
  color: #666;
}

.timeline-item.done {
  opacity: 0.6;
  position: relative;
}

.timeline-item.done::after {
  content: "✔";
  color: #4caf50;           /* Material green */
  position: absolute;
  left: -2.0em;
  top: 0.0rem;
  font-weight: bold;
  font-size: 1.8em;
}

.timeline-item.done p,
.timeline-item.done h3 {
  text-decoration: line-through;
}