/* ============================================
   Timeline Archive Styles
   ============================================ */

.timeline {
  position: relative;
  padding: var(--spacing-xl) 0;
}

/* Vertical line */
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--accent-primary) 10%,
    var(--accent-primary) 90%,
    transparent
  );
  transform: translateX(-50%);
}

/* Year section */
.timeline-year-section {
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

/* Year marker badge */
.timeline-year-marker {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  z-index: 2;
}

.year-badge {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-hover));
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 50px;
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: 
    0 4px 12px var(--shadow-lg),
    0 0 0 4px var(--bg-primary),
    0 0 0 6px var(--accent-primary);
  position: relative;
  animation: yearPulse 2s ease-in-out infinite;
}

@keyframes yearPulse {
  0%, 100% {
    box-shadow: 
      0 4px 12px var(--shadow-lg),
      0 0 0 4px var(--bg-primary),
      0 0 0 6px var(--accent-primary);
  }
  50% {
    box-shadow: 
      0 6px 16px var(--shadow-lg),
      0 0 0 4px var(--bg-primary),
      0 0 0 8px var(--accent-primary);
  }
}

/* Timeline posts container */
.timeline-posts {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* Individual timeline item */
.timeline-item {
  position: relative;
  display: flex;
  justify-content: flex-start;
  animation: fadeInTimeline 0.6s ease-out backwards;
}

/* Left boxes (even global index) */
.timeline-item[data-global-index="0"],
.timeline-item[data-global-index="2"],
.timeline-item[data-global-index="4"],
.timeline-item[data-global-index="6"],
.timeline-item[data-global-index="8"],
.timeline-item[data-global-index="10"],
.timeline-item[data-global-index="12"],
.timeline-item[data-global-index="14"],
.timeline-item[data-global-index="16"],
.timeline-item[data-global-index="18"],
.timeline-item[data-global-index="20"] {
  justify-content: flex-end;
  margin-right: 50%;
  padding-right: var(--spacing-lg);
}

/* Right boxes (odd global index) */
.timeline-item[data-global-index="1"],
.timeline-item[data-global-index="3"],
.timeline-item[data-global-index="5"],
.timeline-item[data-global-index="7"],
.timeline-item[data-global-index="9"],
.timeline-item[data-global-index="11"],
.timeline-item[data-global-index="13"],
.timeline-item[data-global-index="15"],
.timeline-item[data-global-index="17"],
.timeline-item[data-global-index="19"],
.timeline-item[data-global-index="21"] {
  justify-content: flex-start;
  margin-left: 50%;
  padding-left: var(--spacing-lg);
}

/* Stagger animation */
.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }
.timeline-item:nth-child(5) { animation-delay: 0.5s; }
.timeline-item:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInTimeline {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Timeline content card - clickable */
.timeline-content {
  width: 100%;
  max-width: 600px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  box-shadow: 0 2px 8px var(--shadow);
  transition: 
    all var(--transition-fast),
    background-color var(--transition-theme),
    border-color var(--transition-theme);
  position: relative;
  overflow: visible;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
  color: inherit;
}

/* Arrow pointer */
.timeline-content::before {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border: 10px solid transparent;
}

/* Left boxes - arrow on right pointing to timeline */
.timeline-item[data-global-index="0"] .timeline-content::before,
.timeline-item[data-global-index="2"] .timeline-content::before,
.timeline-item[data-global-index="4"] .timeline-content::before,
.timeline-item[data-global-index="6"] .timeline-content::before,
.timeline-item[data-global-index="8"] .timeline-content::before,
.timeline-item[data-global-index="10"] .timeline-content::before,
.timeline-item[data-global-index="12"] .timeline-content::before,
.timeline-item[data-global-index="14"] .timeline-content::before,
.timeline-item[data-global-index="16"] .timeline-content::before,
.timeline-item[data-global-index="18"] .timeline-content::before,
.timeline-item[data-global-index="20"] .timeline-content::before {
  right: -20px;
  border-left-color: var(--border-color);
}

/* Left boxes - text left, image right */
.timeline-item[data-global-index="0"] .timeline-content,
.timeline-item[data-global-index="2"] .timeline-content,
.timeline-item[data-global-index="4"] .timeline-content,
.timeline-item[data-global-index="6"] .timeline-content,
.timeline-item[data-global-index="8"] .timeline-content,
.timeline-item[data-global-index="10"] .timeline-content,
.timeline-item[data-global-index="12"] .timeline-content,
.timeline-item[data-global-index="14"] .timeline-content,
.timeline-item[data-global-index="16"] .timeline-content,
.timeline-item[data-global-index="18"] .timeline-content,
.timeline-item[data-global-index="20"] .timeline-content {
  flex-direction: row;
}

/* Right boxes - arrow on left pointing to timeline */
.timeline-item[data-global-index="1"] .timeline-content::before,
.timeline-item[data-global-index="3"] .timeline-content::before,
.timeline-item[data-global-index="5"] .timeline-content::before,
.timeline-item[data-global-index="7"] .timeline-content::before,
.timeline-item[data-global-index="9"] .timeline-content::before,
.timeline-item[data-global-index="11"] .timeline-content::before,
.timeline-item[data-global-index="13"] .timeline-content::before,
.timeline-item[data-global-index="15"] .timeline-content::before,
.timeline-item[data-global-index="17"] .timeline-content::before,
.timeline-item[data-global-index="19"] .timeline-content::before,
.timeline-item[data-global-index="21"] .timeline-content::before {
  left: -20px;
  border-right-color: var(--border-color);
}

/* Right boxes - image left, text right */
.timeline-item[data-global-index="1"] .timeline-content,
.timeline-item[data-global-index="3"] .timeline-content,
.timeline-item[data-global-index="5"] .timeline-content,
.timeline-item[data-global-index="7"] .timeline-content,
.timeline-item[data-global-index="9"] .timeline-content,
.timeline-item[data-global-index="11"] .timeline-content,
.timeline-item[data-global-index="13"] .timeline-content,
.timeline-item[data-global-index="15"] .timeline-content,
.timeline-item[data-global-index="17"] .timeline-content,
.timeline-item[data-global-index="19"] .timeline-content,
.timeline-item[data-global-index="21"] .timeline-content {
  flex-direction: row-reverse;
}

/* Right boxes - text alignment */
.timeline-item[data-global-index="1"] .timeline-text,
.timeline-item[data-global-index="3"] .timeline-text,
.timeline-item[data-global-index="5"] .timeline-text,
.timeline-item[data-global-index="7"] .timeline-text,
.timeline-item[data-global-index="9"] .timeline-text,
.timeline-item[data-global-index="11"] .timeline-text,
.timeline-item[data-global-index="13"] .timeline-text,
.timeline-item[data-global-index="15"] .timeline-text,
.timeline-item[data-global-index="17"] .timeline-text,
.timeline-item[data-global-index="19"] .timeline-text,
.timeline-item[data-global-index="21"] .timeline-text {
  text-align: right;
}

/* Timeline image - circular */
.timeline-image {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  overflow: hidden;
  filter: grayscale(90%);
  transition: filter var(--transition-base);
  box-shadow: 0 2px 8px var(--shadow);
}

.timeline-content:hover .timeline-image {
  filter: grayscale(0%);
}

.timeline-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Timeline text content */
.timeline-text {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.timeline-content:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow-lg);
  border-color: var(--accent-primary);
}

/* Timeline date */
.timeline-date {
  align-items: baseline;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.timeline-month {
  font-size: 0.75rem;
  color: var(--accent-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.timeline-day {
  font-size: 1.25rem;
  color: var(--accent-primary);
  font-weight: 700;
  line-height: 1;
}

/* Timeline title */
.timeline-title {
  font-size: 1.125rem;
  margin: 0;
  line-height: 1.4;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.timeline-content:hover .timeline-title {
  color: var(--accent-primary);
}

/* Timeline subtitle */
.timeline-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0 0 var(--spacing-md) 0;
  line-height: 1.5;
}

/* Timeline tags */
.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
}

/* Tags alignment based on global index */
.timeline-item[data-global-index="1"] .timeline-tags,
.timeline-item[data-global-index="3"] .timeline-tags,
.timeline-item[data-global-index="5"] .timeline-tags,
.timeline-item[data-global-index="7"] .timeline-tags,
.timeline-item[data-global-index="9"] .timeline-tags,
.timeline-item[data-global-index="11"] .timeline-tags,
.timeline-item[data-global-index="13"] .timeline-tags,
.timeline-item[data-global-index="15"] .timeline-tags,
.timeline-item[data-global-index="17"] .timeline-tags,
.timeline-item[data-global-index="19"] .timeline-tags,
.timeline-item[data-global-index="21"] .timeline-tags {
  justify-content: flex-end;
}

.timeline-tag {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.timeline-tag:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

/* Mobile responsive */
@media (max-width: 900px) {
  .timeline::before {
    left: 20px;
  }
  
  .timeline-item {
    flex-direction: row !important;
    text-align: left !important;
    padding-left: var(--spacing-md);
  }
  
  .timeline-content {
    max-width: 100%;
  }
  
  .timeline-content::before {
    left: -20px !important;
    right: auto !important;
    border-right-color: var(--border-color) !important;
    border-left-color: transparent !important;
  }
  
  .timeline-dot {
    position: absolute;
    left: 13px;
  }
  
  .timeline-tags {
    justify-content: flex-start !important;
  }
  
  .year-badge {
    font-size: 1.5rem;
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  
  .timeline-title {
    font-size: 1.125rem;
  }
}

/* Tablet adjustments */
@media (max-width: 1200px) and (min-width: 901px) {
  .timeline-content {
    max-width: calc(50% - 30px);
  }
  
  .timeline-title {
    font-size: 1.125rem;
  }
}