/* ========================================
   Vertical Timeline
   ======================================== */
.section-experience {
  background: var(--bg-primary);
}

.timeline {
  position: relative;
  padding: var(--space-md) 0;
}

/* Central Line */
.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--divider);
  transform: translateX(-50%);
  z-index: 1;
}

.timeline-line-fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: var(--accent);
  transition: height 0.1s linear;
}

/* Timeline Item */
.timeline-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--space-lg);
  min-height: 120px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

/* Node */
.timeline-node {
  position: absolute;
  left: 50%;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  background: var(--divider);
  border: 2px solid var(--bg-primary);
  transform: translateX(-50%);
  z-index: 2;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.timeline-node.active {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 240, 255, 0.15), 0 0 20px rgba(0, 240, 255, 0.3);
  animation: nodePulse 2s ease-in-out infinite;
}

/* Content - alternating sides */
.timeline-content {
  width: calc(50% - var(--space-lg));
  padding: var(--space-sm) 0;
}

.timeline-item[data-side="left"] .timeline-content {
  margin-right: auto;
  padding-right: var(--space-lg);
  text-align: right;
}

.timeline-item[data-side="right"] .timeline-content {
  margin-left: auto;
  padding-left: var(--space-lg);
  text-align: left;
}

/* Meta */
.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: var(--space-xs);
}

.timeline-item[data-side="left"] .timeline-meta {
  align-items: flex-end;
}

.timeline-item[data-side="right"] .timeline-meta {
  align-items: flex-start;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.timeline-company {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Role & Description */
.timeline-role {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ========================================
   Mobile: stack to left-axis right-content
   ======================================== */
@media (max-width: 768px) {
  .timeline-line {
    left: 8px;
    transform: none;
  }

  .timeline-node {
    left: 8px;
    transform: translateX(-50%);
  }

  .timeline-content {
    width: 100%;
    padding-left: var(--space-lg) !important;
    padding-right: 0 !important;
    text-align: left !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .timeline-item[data-side="left"] .timeline-meta,
  .timeline-item[data-side="right"] .timeline-meta {
    align-items: flex-start;
  }
}