body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: #f9fafb;
  color: #1f2937;
  margin: 0;
  line-height: 1.6;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #333;
  font-size: 20px;
  font-weight: bold;
}

.logo img {
  height: 60px;
  margin-right: 20px;
}

.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.page-header {
  display: flex;
  align-items: center;
  margin-bottom: 2.5rem;
}

.header-icon {
  font-size: 2rem;
  color: #2563eb;
  margin-right: 0.75rem;
}

.header-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #111827;
}

.main-layout {
  display: flex;
  gap: 2.5rem;
}

.sidebar {
  width: 20%;
  flex-shrink: 0;
}

.nav-group {
  margin-bottom: 1.5rem;
}

.nav-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

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

.nav-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #4b5563;
  text-decoration: none;
  border-radius: 6px;
  transition: background-color 0.2s, color 0.2s;
}

.nav-link:hover {
  background-color: #f3f4f6;
  color: #111827;
}

.nav-link.active {
  background-color: #eff6ff;
  color: #2563eb;
}

.content-area {
  padding: 0.1rem;
}

.content-block {
  display: none;
}

.content-block.active {
  display: block;
}

.content-main-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: #111827;
  margin-top: 0;
  margin-bottom: 1rem;
}

.content-meta {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  color: #6b7280;
  margin-bottom: 2rem;
}

.content-meta span:first-child {
  margin-right: 0.25rem;
}

.content-body section {
  margin-bottom: 1.5rem;
}

.content-section-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #111827;
  margin-bottom: 0.5rem;
}

.content-body p {
  margin-bottom: 1rem;
  color: #374151;
}

.content-body a {
  color: #2563eb;
  text-decoration: none;
}

.content-body a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .main-layout {
    flex-direction: column;
    gap: 0;
  }

  .sidebar,
  .content-area {
    width: 100%;
  }

  .page-container {
    padding: 1.5rem 1rem;
  }

}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
  vertical-align: top;
}

th {
  background-color: #f2f2f2;
}