/* 
 * Simplified Timeline Styles
 * Optimized for clarity and readability without overlapping elements
 */

.timeline-section {
  padding: 5rem 0;
  background-color: var(--background-light);
  position: relative;
}

.timeline-section .section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
}

/* Simplified Timeline Container */
.timeline-simple {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Timeline Item */
.timeline-simple-item {
  display: flex;
  margin-bottom: 2.5rem;
  position: relative;
}

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

/* Year Column */
.timeline-year {
  flex: 0 0 120px;
  text-align: right;
  padding-right: 2rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  padding-top: 0.5rem;
}

/* Content Column */
.timeline-simple-content {
  flex: 1;
  background-color: var(--background-light);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
  position: relative;
  border-left: 4px solid var(--primary-color);
}

/* Title */
.timeline-simple-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--primary-color);
  font-weight: 600;
}

/* Description */
.timeline-simple-description {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-dark);
}

/* Icon - Positioned clearly separate from year */
.timeline-simple-icon {
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  background-color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  box-shadow: 0 0 0 4px var(--background-light);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .timeline-year {
    flex: 0 0 80px;
    font-size: 1.25rem;
    padding-right: 1.5rem;
  }
  
  .timeline-simple-content {
    padding: 1.25rem;
  }
  
  .timeline-simple-title {
    font-size: 1.1rem;
  }
  
  .timeline-simple-description {
    font-size: 0.95rem;
  }
}

@media (max-width: 576px) {
  .timeline-simple-item {
    flex-direction: column;
    margin-bottom: 2rem;
  }
  
  .timeline-year {
    flex: 0 0 auto;
    text-align: left;
    padding-right: 0;
    padding-bottom: 0.5rem;
    padding-left: 1.5rem;
  }
  
  .timeline-simple-content {
    margin-left: 1.5rem;
  }
  
  .timeline-simple-icon {
    left: 0;
    top: 0;
    transform: translateY(0);
  }
}

/* High-contrast mode for accessibility */
@media (prefers-contrast: high) {
  .timeline-simple-content {
    border: 2px solid #000;
    border-left: 6px solid #000;
  }
  
  .timeline-simple-icon {
    background-color: #000;
    box-shadow: 0 0 0 4px #fff, 0 0 0 6px #000;
  }
  
  .timeline-year {
    color: #000;
    font-weight: bold;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  .timeline-simple-content {
    background-color: var(--background-gray);
  }
  
  .timeline-simple-icon {
    box-shadow: 0 0 0 4px var(--background-gray);
  }
}