.publication-timeline {
  max-width: 950px;
  margin: 0 auto;
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px 28px 1fr;
  column-gap: 20px;
  position: relative;
  min-height: 190px;
}

.timeline-item time {
  text-align: right;
  padding-top: 12px;
  color: var(--secondary);
  font-weight: 600;
}

.timeline-marker {
  position: relative;
  border-left: 3px solid #d9d9d9;
}

.timeline-marker::before {
  content: "";
  position: absolute;
  top: 10px;
  left: -10px;
  width: 15px;
  height: 15px;
  background: var(--theme);
  border: 4px solid var(--primary);
  border-radius: 50%;
}

.timeline-content {
  padding: 8px 0 45px;
}

.timeline-content h2 {
  margin: 12px 0;
}

.timeline-content h2 a {
  color: var(--primary);
  text-decoration: none;
}

.timeline-content p {
  color: var(--secondary);
  font-size: 1.1rem;
}

.publication-meta {
  color: var(--secondary);
}

.publication-type {
  background: #3aa66b;
  color: white;
  padding: 5px 12px;
  border-radius: 5px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.publication-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.publication-tags span {
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px 10px;
  font-size: 0.85rem;
}

@media (max-width: 700px) {
  .timeline-item {
    grid-template-columns: 28px 1fr;
    column-gap: 16px;
  }

  .timeline-item time {
    grid-column: 2;
    text-align: left;
    padding: 0;
  }

  .timeline-marker {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .timeline-content {
    grid-column: 2;
  }
}