.sidebar {
  width: 220px;
  min-height: 100vh;
  background: #f8fafc;
  border-right: 1px solid #e2e8f0;
  padding: 20px 0;
  position: fixed;
  left: 0;
  top: 0;
  overflow-y: auto;
}

.sidebar-header {
  padding: 0 20px 16px;
  border-bottom: 1px solid #e2e8f0;
  margin-bottom: 12px;
}

.sidebar-header h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  color: #0f172a;
}

.sidebar-subtitle {
  font-size: 12px;
  color: #64748b;
  margin: 2px 0 0;
}

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

.nav-list li a {
  display: block;
  padding: 6px 20px;
  color: #334155;
  text-decoration: none;
  font-size: 13px;
}

.nav-list li a:hover {
  background: #e2e8f0;
  color: #0f172a;
}

.nav-list li a.active {
  background: #3b82f6;
  color: #ffffff;
}

.nav-section {
  padding: 12px 20px 4px !important;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: #94a3b8;
  letter-spacing: 0.05em;
}

.content {
  margin-left: 240px;
  padding: 32px 48px;
  max-width: 900px;
}

.content h1 {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 24px;
  color: #0f172a;
}

.content h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: #0f172a;
}

.content h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 8px;
  color: #1e293b;
}

.content p {
  color: #334155;
  line-height: 1.6;
  margin: 0 0 12px;
}

.content ul {
  color: #334155;
  padding-left: 20px;
  margin: 0 0 16px;
}

.content li {
  margin-bottom: 4px;
  line-height: 1.5;
}

.content code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  color: #e11d48;
}

.caption {
  font-size: 12px;
  color: #64748b;
  font-style: italic;
  margin: -8px 0 20px !important;
}

.layer-card, .runtime-card, .principle-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px 20px;
  margin: 12px 0;
}

.layer-card h3, .runtime-card h3, .principle-card h3 {
  margin-top: 0;
  color: #0f172a;
}

.layer-card ul, .runtime-card ul, .principle-card ul {
  margin-bottom: 0;
}

canvas {
  display: block;
  margin: 16px 0;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #ffffff;
}

.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin: 20px 0;
}

.widget-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  overflow: hidden;
}

.widget-card-header {
  padding: 10px 14px;
  background: #f8fafc;
  border-bottom: 1px solid #e2e8f0;
  font-size: 14px;
  font-weight: 600;
  color: #0f172a;
}

.widget-card-canvas {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: #fafbfc;
}

.widget-card-canvas canvas {
  border: none;
  margin: 0;
}

.widget-card-body {
  padding: 12px 14px;
  font-size: 12px;
  color: #64748b;
}

.widget-card-body .prop-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}

.widget-card-body .prop-list li {
  padding: 2px 0;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 11px;
  color: #334155;
}

.widget-card-body .prop-list li::before {
  content: '';
}

.section {
  margin: 32px 0;
}

.hero {
  text-align: center;
  padding: 40px 0 32px;
  border-bottom: 1px solid #e2e8f0;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: 42px;
  font-weight: 800;
  margin: 0 0 12px;
  color: #0f172a;
}

.hero-subtitle {
  font-size: 18px;
  color: #64748b;
  max-width: 600px;
  margin: 0 auto 20px;
  line-height: 1.5;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  color: #475569;
}

.card-grid {
  display: grid;
  gap: 16px;
  margin: 20px 0;
}

.card-grid.two-col {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid.three-col {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 20px;
}

.card h3 {
  margin-top: 0;
  color: #0f172a;
}

.card p {
  margin-bottom: 12px;
}

.card ul {
  margin: 0;
  padding-left: 16px;
}

.card-link {
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s;
}

.card-link:hover {
  border-color: #3b82f6;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.feature-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px 20px;
}

.feature-card h3 {
  margin-top: 0;
  color: #0f172a;
}

.feature-card p {
  margin: 0;
  font-size: 13px;
}

.table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.table th {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  color: #0f172a;
}

.table td {
  border: 1px solid #e2e8f0;
  padding: 8px 12px;
  color: #334155;
}

.table tbody tr:hover {
  background: #f8fafc;
}

.code-block {
  background: #0f172a;
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.5;
  color: #e2e8f0;
}

.code-block code {
  background: none;
  padding: 0;
  color: inherit;
}

.footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #e2e8f0;
  text-align: center;
  font-size: 12px;
  color: #94a3b8;
}

.footer p {
  margin: 4px 0;
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  .content {
    margin-left: 0;
    padding: 20px;
  }
  .widget-grid {
    grid-template-columns: 1fr;
  }
  .card-grid.two-col,
  .card-grid.three-col,
  .feature-grid {
    grid-template-columns: 1fr;
  }
}