/* Updates/Changelog Timeline Styles */

/* Timeline Container */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-lg) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-purple), var(--color-pink));
  border-radius: 3px;
}

/* Timeline Item */
.timeline-item {
  position: relative;
  padding-left: 60px;
  padding-bottom: var(--spacing-xl);
}

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

/* Timeline Dot */
.timeline-item::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 4px;
  width: 20px;
  height: 20px;
  background: var(--color-white);
  border: 4px solid var(--color-primary);
  border-radius: 50%;
  z-index: 1;
}

.timeline-item--major::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.2);
}

.timeline-item--feature::before {
  border-color: var(--color-green);
}

.timeline-item--fix::before {
  border-color: var(--color-orange);
}

/* Timeline Card */
.timeline-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.timeline-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
}

.timeline-card__header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.timeline-card__version {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--gradient-hero);
  color: var(--color-white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.timeline-card__date {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

.timeline-card__tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.timeline-card__tag--new {
  background: #dcfce7;
  color: #166534;
}

.timeline-card__tag--feature {
  background: #dbeafe;
  color: #1e40af;
}

.timeline-card__tag--fix {
  background: #fef3c7;
  color: #92400e;
}

.timeline-card__tag--performance {
  background: #f3e8ff;
  color: #7c3aed;
}

.timeline-card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-800);
}

.timeline-card__content {
  color: var(--color-gray-600);
  line-height: 1.6;
}

.timeline-card__content ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-lg);
}

.timeline-card__content li {
  margin-bottom: var(--spacing-xs);
}

/* Version Stats */
.version-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.version-stat {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.version-stat__number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.version-stat__label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* Filter Buttons */
.update-filters {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  justify-content: center;
}

.update-filter-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  transition: all var(--transition-fast);
}

.update-filter-btn:hover,
.update-filter-btn--active {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Responsive */
@media (max-width: 768px) {
  .timeline::before {
    left: 15px;
  }
  
  .timeline-item {
    padding-left: 50px;
  }
  
  .timeline-item::before {
    left: 8px;
    width: 16px;
    height: 16px;
  }
  
  .timeline-card__header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
}