/* ============================
   TIMELINE.CSS — Radio Bleue
   ============================ */

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-lg) 0;
}

/* Ligne centrale */
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--color-border) 10%, var(--color-border) 90%, transparent);
  transform: translateX(-50%);
}

/* Item timeline */
.timeline-item {
  display: flex;
  justify-content: flex-end;
  padding-right: calc(50% + var(--space-2xl));
  margin-bottom: var(--space-3xl);
  position: relative;
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.timeline-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: calc(50% + var(--space-2xl));
  transform: translateX(30px);
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Point central */
.timeline-dot {
  position: absolute;
  left: 50%;
  top: var(--space-md);
  transform: translateX(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-extrabold);
  font-size: var(--font-size-xs);
  color: var(--color-dark-bg);
  z-index: 2;
  border: 4px solid var(--color-surface);
  box-shadow: 0 0 0 2px var(--color-accent);
  white-space: nowrap;
}

/* Contenu */
.timeline-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  max-width: 380px;
  width: 100%;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.timeline-content:hover {
  box-shadow: 0 6px 24px rgba(26,95,168,0.14);
  transform: translateY(-2px);
}

.timeline-year {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-sm);
  display: none; /* visible only mobile */
}

.timeline-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.timeline-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* Section chiffres */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.stat-card {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-sm);
  display: block;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.65);
  font-weight: var(--font-weight-medium);
}

/* Responsive */
@media (max-width: 768px) {
  .timeline::before {
    left: 24px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 72px;
    transform: translateX(0);
    opacity: 0;
  }

  .timeline-item.visible {
    opacity: 1;
  }

  .timeline-dot {
    left: 24px;
    width: 44px;
    height: 44px;
    font-size: 0.65rem;
  }

  .timeline-year {
    display: block;
  }

  .timeline-content {
    max-width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stat-number {
    font-size: var(--font-size-2xl);
  }
}