/* ===================================
   INTERACTIVE EXPERIENCE TIMELINE
   =================================== */

/* Experience Section */
.experience {
  padding: var(--space-12) 0;
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
  position: relative;
  overflow: hidden;
}

.experience::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 20%, rgba(0, 102, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.experience.header {
  text-align: center;
  margin-bottom: var(--space-12);
  position: relative;
  z-index: 2;
}

.experience.header h3 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  position: relative;
}

.experience.header h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-full);
}

/* Timeline Container */
.timeline-container {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Timeline Line */
.timeline-container::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, 
    var(--color-primary) 0%, 
    var(--color-primary-light) 50%, 
    var(--color-accent) 100%);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  z-index: 1;
}

/* Progress Indicator */
.timeline-progress {
  position: absolute;
  left: 50%;
  top: 0;
  width: 4px;
  height: 0%;
  background: linear-gradient(to bottom, 
    var(--color-secondary) 0%, 
    var(--color-secondary-light) 100%);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  z-index: 2;
  transition: height 0.3s ease-out;
}

/* Experience Content Cards */
.experience-content {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(50px);
  width: calc(50% - var(--space-6));
  z-index: 3;
}

/* Alternating Layout */
.experience-content:nth-child(odd) {
  left: 0;
  margin-right: auto;
}

.experience-content:nth-child(even) {
  left: auto;
  right: 0;
  margin-left: auto;
}

/* Timeline Dots */
.experience-content::before {
  content: '';
  position: absolute;
  top: var(--space-6);
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border: 4px solid var(--color-white);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  z-index: 4;
  transition: all var(--transition-base);
}

.experience-content:nth-child(odd)::before {
  right: -46px;
}

.experience-content:nth-child(even)::before {
  left: -46px;
}

/* Connector Lines */
.experience-content::after {
  content: '';
  position: absolute;
  top: calc(var(--space-6) + 10px);
  width: 30px;
  height: 2px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  z-index: 3;
}

.experience-content:nth-child(odd)::after {
  right: -30px;
}

.experience-content:nth-child(even)::after {
  left: -30px;
}

/* Card Hover Effects */
.experience-content:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: rgba(0, 102, 255, 0.3);
}

.experience-content:hover::before {
  transform: scale(1.2);
  box-shadow: 0 0 20px rgba(0, 102, 255, 0.4);
}

/* Card Content */
.experience-date-header {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.experience-date-header::before {
  content: '';
  width: 30px;
  height: 2px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-full);
}

.experience-title {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
  line-height: var(--line-height-tight);
}

.experience-company {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-secondary);
  margin-bottom: var(--space-4);
}

.experience-summary {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

/* Expandable Details */
.experience-details {
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-slow);
  opacity: 0;
}

.experience-details.expanded {
  max-height: 500px;
  opacity: 1;
  margin-top: var(--space-4);
}

.experience-highlights {
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience-highlights li {
  position: relative;
  padding-left: var(--space-4);
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

.experience-highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: 50%;
}

.experience-technologies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-3);
}

.tech-tag {
  padding: var(--space-1) var(--space-2);
  background: rgba(0, 102, 255, 0.1);
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-base);
  border: 1px solid rgba(0, 102, 255, 0.2);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* Expand Button */
.expand-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--space-3);
}

.expand-btn:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.expand-btn i {
  transition: transform var(--transition-fast);
}

.expand-btn.expanded i {
  transform: rotate(180deg);
}

/* Animation Classes */
.experience-content.animate-in {
  animation: slideInTimeline 0.8s ease-out forwards;
}

@keyframes slideInTimeline {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered Animation Delays */
.experience-content:nth-child(1) { animation-delay: 0.1s; }
.experience-content:nth-child(2) { animation-delay: 0.2s; }
.experience-content:nth-child(3) { animation-delay: 0.3s; }
.experience-content:nth-child(4) { animation-delay: 0.4s; }
.experience-content:nth-child(5) { animation-delay: 0.5s; }
.experience-content:nth-child(6) { animation-delay: 0.6s; }
.experience-content:nth-child(7) { animation-delay: 0.7s; }

/* Mobile Responsive Design */
@media (max-width: 768px) {
  .timeline-container::before {
    left: 30px;
  }
  
  .timeline-progress {
    left: 30px;
  }
  
  .experience-content {
    width: calc(100% - var(--space-8));
    left: var(--space-8) !important;
    right: auto !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }
  
  .experience-content::before {
    left: -46px !important;
    right: auto !important;
  }
  
  .experience-content::after {
    left: -30px !important;
    right: auto !important;
  }
  
  .experience {
    padding: var(--space-8) 0;
  }
  
  .experience.header {
    margin-bottom: var(--space-8);
  }
}

@media (max-width: 480px) {
  .timeline-container {
    padding: 0 var(--space-2);
  }
  
  .experience-content {
    padding: var(--space-4);
    width: calc(100% - var(--space-6));
    left: var(--space-6) !important;
  }
  
  .experience-content::before {
    left: -36px !important;
    width: 16px;
    height: 16px;
  }
  
  .experience-content::after {
    left: -24px !important;
    width: 24px;
  }
  
  .timeline-container::before,
  .timeline-progress {
    left: 24px;
  }
  
  .experience-title {
    font-size: var(--font-size-lg);
  }
  
  .experience-company {
    font-size: var(--font-size-base);
  }
}

/* Grey Bar Separator */
.grey-bar {
  width: 100%;
  height: 2px;
  background: linear-gradient(135deg, var(--color-gray-200) 0%, var(--color-gray-300) 100%);
  margin: var(--space-8) 0;
  border-radius: var(--radius-full);
  opacity: 0.6;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .experience-content,
  .experience-content::before,
  .experience-content::after,
  .expand-btn,
  .expand-btn i,
  .tech-tag,
  .timeline-progress {
    transition: none;
    animation: none;
  }
  
  .experience-content:hover {
    transform: none;
  }
  
  .experience-content.animate-in {
    opacity: 1;
    transform: translateY(0);
  }
}