.carrier {
  padding: 1rem 1.5rem 0;
}

.carrier::after {
  margin: 80px auto 50px;
}

.carrier-container {
  max-width: 720px;
  margin: 0 auto;
}

.carrier-title {
  margin: 0 0 3.5rem;
  font-size: clamp(2.25rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-align: center;
  color: var(--color-heading);
}

.timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 32px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 2rem;
}

.timeline-item + .timeline-item {
  margin-top: 3rem;
}

.timeline-logo {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-circle);
  background: var(--color-timeline-logo-bg);
  border: 3px solid var(--color-brand);
  box-shadow: 0 4px 12px rgba(var(--color-black-rgb), 0.1);
}

.timeline-logo-img {
  width: 100%;
  height: 60%;
  object-fit: contain;
}

.timeline-content {
  flex: 1;
  padding-top: 0.4rem;
}

.timeline-year {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-brand);
}

.timeline-role {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-heading);
}

.timeline-org {
  margin: 0.25rem 0 0.6rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.timeline-desc {
  margin: 0;
  max-width: 560px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.timeline-subsections {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.25rem;
  padding-left: 1.25rem;
  border-left: 2px solid var(--color-border);
}

.timeline-subsections::before,
.timeline-subsections::after {
  content: "";
  position: absolute;
  left: -5px;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-circle);
  background: var(--color-border);
}

.timeline-subsections::before {
  top: -4px;
}

.timeline-subsections::after {
  bottom: -4px;
}

.subsection-title {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-body);
}

.subsection-desc {
  margin: 0.25rem 0 0;
  max-width: 520px;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .carrier-title {
    font-size: 2rem;
  }

  .timeline::before {
    left: 24px;
  }

  .timeline-item {
    gap: 1.25rem;
  }

  .timeline-logo {
    width: 48px;
    height: 48px;
  }
}