.timeline {
  position: relative;
  padding-left: 76px;
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 27px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-accent),
    var(--color-accent-purple) 40%,
    var(--color-accent-cyan) 75%,
    transparent
  );
  opacity: 0.5;
}

.timeline-entry {
  position: relative;
}

.timeline-marker {
  position: absolute;
  left: -76px;
  top: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-dot {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--color-accent);
}

.timeline-card {
  padding: var(--space-6);
}

.timeline-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.timeline-card-head h3 {
  font-size: var(--text-xl);
}

.timeline-duration {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.timeline-subtitle {
  margin-top: var(--space-1);
  color: var(--color-accent-cyan);
  font-weight: 500;
  font-size: var(--text-sm);
}

.timeline-details {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.timeline-details li {
  position: relative;
  padding-left: var(--space-4);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.timeline-details li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--gradient-primary);
}

.timeline-tags {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

@media (max-width: 620px) {
  .timeline {
    padding-left: 56px;
  }

  .timeline::before {
    left: 19px;
  }

  .timeline-marker {
    left: -56px;
    width: 40px;
    height: 40px;
  }

  .timeline-dot {
    width: 40px;
    height: 40px;
    font-size: 0.95rem;
  }

  .timeline-card {
    padding: var(--space-5);
  }
}