body {
  padding-top: 70px;
  background-color: #f8f9fa;
}

.main-content {
  padding: 20px 15px;
}

.header {
  text-align: center;
  margin-bottom: 40px;
  padding: 30px 0;
}

.header h1 {
  color: #2A3C98;
  margin-bottom: 10px;
  font-size: 2rem;
}

.category {
  margin-bottom: 40px;
}

.category-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #2A3C98;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #2A3C98;
}

.page-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.page-card {
  background: white;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s ease;
  text-decoration: none;
  color: inherit;
  display: block;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.page-card:hover {
  box-shadow: 0 4px 12px rgba(42, 60, 152, 0.15);
  transform: translateY(-2px);
  border-color: #2A3C98;
  text-decoration: none;
  color: inherit;
}

.page-card:active {
  transform: translateY(0);
}

.page-card h5 {
  margin: 0 0 8px 0;
  color: #2A3C98;
  font-size: 1.1rem;
  font-weight: 600;
}

.page-card p {
  margin: 0;
  color: #6c757d;
  font-size: 0.875rem;
}

.footer {
  text-align: center;
  margin-top: 60px;
  padding: 30px 20px;
  color: #6c757d;
  font-size: 0.875rem;
  border-top: 1px solid #dee2e6;
}

.loading {
  text-align: center;
  padding: 60px 20px;
  color: #6c757d;
}

.error {
  text-align: center;
  padding: 40px;
  color: #dc3545;
  background: #f8d7da;
  border: 1px solid #f5c6cb;
  border-radius: 4px;
  margin: 20px 0;
}

@media (max-width: 768px) {
  body {
    padding-top: 56px;
  }
  .main-content {
    padding: 15px 10px;
  }
  .container {
    padding-left: 10px;
    padding-right: 10px;
  }
  .header {
    margin-bottom: 30px;
    padding: 20px 0;
  }
  .header h1 {
    font-size: 1.5rem;
    margin-bottom: 8px;
  }
  .header p {
    font-size: 0.9rem;
  }
  .category {
    margin-bottom: 30px;
  }
  .category-title {
    font-size: 1.25rem;
    margin-bottom: 15px;
    padding-bottom: 8px;
  }
  .page-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .page-card {
    padding: 16px;
  }
  .page-card h5 {
    font-size: 1rem;
    margin-bottom: 6px;
  }
  .page-card p {
    font-size: 0.8rem;
  }
  .footer {
    margin-top: 40px;
    padding: 20px 10px;
    font-size: 0.8rem;
  }
  .footer p {
    margin-bottom: 5px;
  }
  .loading {
    padding: 40px 15px;
    font-size: 0.9rem;
  }
  .error {
    padding: 20px 15px;
    margin: 15px 0;
    font-size: 0.9rem;
  }
}