/* ====================================
   Timeline Styles
   Interactive biography timeline
   ==================================== */

.timeline-nav {
  position: sticky;
  top: 100px;
  width: 80px;
  flex-shrink: 0;
  align-self: flex-start;
  display: none;
}

@media (min-width: 1024px) {
  .timeline-nav {
    display: block;
  }
}

.timeline-track {
  position: relative;
  padding-left: 20px;
}

.timeline-track::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-marker {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  text-decoration: none;
  color: var(--color-text-light);
  transition: all var(--transition-base);
}

.timeline-marker:hover,
.timeline-marker.active {
  color: var(--color-accent);
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px solid var(--color-border);
  position: relative;
  left: -14px;
  transition: all var(--transition-base);
}

.timeline-marker:hover .timeline-dot,
.timeline-marker.active .timeline-dot {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: scale(1.2);
}

.timeline-label {
  font-size: var(--text-sm);
  font-weight: 600;
}

/* Timeline sections in content */
.timeline-section {
  scroll-margin-top: 120px;
  padding-top: var(--space-lg);
  position: relative;
}

.timeline-section::before {
  content: attr(data-year);
  position: absolute;
  left: -100px;
  top: var(--space-lg);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  color: var(--color-accent);
  opacity: 0.3;
  display: none;
}

@media (min-width: 1200px) {
  .timeline-section::before {
    display: block;
  }
}

/* Fade-in animation on scroll */
.fade-in-section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Photo parallax in biography */
.bio-inline-photo {
  margin: var(--space-xl) 0;
  position: relative;
}

.bio-inline-photo img {
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
}

.bio-inline-photo figcaption {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-top: var(--space-sm);
  font-style: italic;
}

/* Float photos on larger screens */
@media (min-width: 768px) {
  .bio-inline-photo.float-right {
    float: right;
    margin-left: var(--space-xl);
    margin-bottom: var(--space-md);
    max-width: 300px;
  }

  .bio-inline-photo.float-left {
    float: left;
    margin-right: var(--space-xl);
    margin-bottom: var(--space-md);
    max-width: 300px;
  }
}

/* Clear floats after sections */
.timeline-section::after {
  content: '';
  display: table;
  clear: both;
}