/* ================================================
   Timeline Component - タイムラインコンポーネント
   すべてのサイズやスタイルはvariables.cssで一括管理
   ================================================ */

/* Timeline Container */
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(var(--grid-cols-mobile), 1fr);
  gap: var(--gap-lg);
}

@media (min-width: 768px) {
  .timeline {
    grid-template-columns: repeat(var(--grid-cols-tablet), 1fr);
  }
}

/* Timeline Item */
.timeline-item {
  background: var(--bg-primary);
  padding: var(--timeline-item-padding);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
  border-left: var(--timeline-item-border-width) solid var(--timeline-item-border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* Timeline Year */
.timeline-year {
  font-size: var(--timeline-year-size);
  font-weight: var(--timeline-year-weight);
  color: var(--timeline-year-color);
  font-family: var(--font-secondary);
  margin-bottom: var(--spacing-sm);
}

/* Timeline Title */
.timeline-title {
  font-size: var(--timeline-title-size);
  font-weight: var(--timeline-title-weight);
  color: var(--color-text-primary);
  margin: 0 0 10px;
}

/* Timeline Description/Text */
.timeline-text {
  font-size: var(--timeline-text-size);
  color: var(--timeline-text-color);
  line-height: var(--line-height-relaxed);
  margin: 0;
}