:root {
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent: #2563eb;
  --border: #e5e7eb;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  margin: 0;
}

.timeline-section {
  max-width: 900px;
  margin: 80px auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 60px;
}

.timeline {
  position: relative;
}

.timeline-item {
  margin-bottom: 32px;
}

.timeline-content {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 26px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
  animation: fadeUp 0.6s ease forwards;
  opacity: 1;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.timeline-content:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.08);
}

.timeline-year {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.timeline-content h2 {
  margin: 6px 0 8px;
  font-size: 1.35rem;
  font-weight: 700;
}

.timeline-content p {
  margin: 0 0 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline-content a {
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.timeline-content a:hover {
  text-decoration: underline;
}