:root {
  --primary-color: #2c3e50;
  --secondary-color: #34495e;
  --accent-color: #3498db;
  --text-color: #2c3e50;
  --light-bg: #ecf0f1;
}

body {
  font-family: 'Merriweather', serif;
  color: var(--text-color);
  padding-top: 56px;
}

h1, h2, h3, h4 {
  font-family: 'Open Sans', sans-serif;
  font-weight: 600;
}

.navbar {
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-link.active {
  color: var(--accent-color) !important;
  font-weight: bold;
}

.hero-section {
  background: var(--primary-color);
  color: white;
  padding: 100px 0;
  margin-bottom: 30px;
}

.hero-section h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.hero-section .lead {
  font-size: 1.5rem;
}

section {
  padding: 60px 0;
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  width: 2px;
  height: 100%;
  background: var(--accent-color);
}

.timeline-item {
  padding: 20px 40px;
  position: relative;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-item::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-color);
  top: 30px;
}

.timeline-item:nth-child(odd)::before {
  right: -8px;
}

.timeline-item:nth-child(even)::before {
  left: -8px;
}

footer {
  margin-top: 60px;
}

@media (max-width: 768px) {
  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
    text-align: left;
  }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    left: 0;
  }

  .timeline-item:nth-child(odd)::before,
  .timeline-item:nth-child(even)::before {
    left: 18px;
  }
}