/* CSS Variables */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --code-bg: #1e293b;
  --code-text: #e2e8f0;
  --sidebar-width: 280px;
  --toc-width: 220px;
  --header-height: 60px;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
}

a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  min-height: 100vh;
}

/* Header */
.header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-text {
  font-size: 1.25rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #34d399, #22d3d3);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.125rem;
}

.logo-docs {
  font-size: 0.875rem;
  padding: 0.125rem 0.5rem;
  background: var(--accent-color);
  color: white;
  border-radius: 4px;
}

.btn-getting-started {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, #34d399, #22d3d3);
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 8px;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(34, 211, 211, 0.3);
}

.btn-getting-started:hover {
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(34, 211, 211, 0.4);
}

.header-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-secondary);
}

.theme-toggle:hover {
  background: var(--bg-secondary);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* Sidebar */
.sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  padding: 1.5rem;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-section {
  margin-bottom: 0.5rem;
}

.nav-section-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-primary);
  padding: 0.5rem 0;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.nav-icon {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.nav-links {
  list-style: none;
  padding-left: 1.5rem;
}

.nav-links li {
  margin: 0.25rem 0;
}

.nav-links a {
  display: block;
  padding: 0.375rem 0.75rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  border-radius: 4px;
  border-left: 2px solid transparent;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.nav-links a.active {
  color: var(--accent-color);
  background: var(--bg-tertiary);
  border-left-color: var(--accent-color);
  font-weight: 500;
}

/* Main Content */
.main {
  padding: 2rem 3rem;
  max-width: 100%;
  overflow-x: hidden;
}

/* Landing Page */
.landing {
  max-width: 1000px;
}

.hero {
  text-align: center;
  padding: 3rem 0;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.quick-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.quick-link {
  padding: 0.75rem 1.5rem;
  background: var(--accent-color);
  color: white;
  border-radius: 6px;
  font-weight: 500;
}

.quick-link:hover {
  background: var(--accent-hover);
  color: white;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.section-card {
  display: block;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.section-card:hover {
  border-color: var(--accent-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.section-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-color);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.section-icon svg {
  width: 20px;
  height: 20px;
  color: white;
}

.section-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.section-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Article */
.article {
  max-width: 1000px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb .separator {
  color: var(--text-muted);
}

.breadcrumb .current {
  color: var(--text-primary);
}

.content-wrapper {
  display: flex;
  gap: 3rem;
}

.content {
  flex: 1;
  min-width: 0;
}

/* Typography */
.content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.content ul, .content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.content li {
  margin-bottom: 0.5rem;
}

.content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Code */
.content code {
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.875em;
  background: var(--bg-tertiary);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  color: var(--text-primary);
}

.code-block {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 1rem;
}

.code-block code {
  background: transparent;
  padding: 0;
  font-size: 0.875rem;
  color: var(--code-text);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin-bottom: 1rem;
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.doc-table th,
.doc-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border: 1px solid var(--border-color);
}

.doc-table th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
}

.doc-table td {
  color: var(--text-secondary);
}

.doc-table tr:hover td {
  background: var(--bg-secondary);
}

/* Table of Contents */
.toc {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  width: var(--toc-width);
  flex-shrink: 0;
  max-height: calc(100vh - var(--header-height) - 4rem);
  overflow-y: auto;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border-color);
}

.toc h4 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.toc ul {
  list-style: none;
}

.toc li {
  margin: 0.375rem 0;
}

.toc a {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: block;
  padding: 0.25rem 0;
}

.toc a:hover {
  color: var(--text-primary);
}

.toc .toc-sub {
  padding-left: 0.75rem;
}

/* Prev/Next Navigation */
.prev-next {
  display: flex;
  gap: 1.5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.prev-next a,
.prev-next > div {
  flex: 1;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.prev-next a:hover {
  border-color: var(--accent-color);
}

.prev-next .label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.prev-next .title {
  display: block;
  color: var(--text-primary);
  font-weight: 500;
}

.prev-next .prev {
  text-align: left;
}

.prev-next .next {
  text-align: right;
}

/* Section Page */
.section-page .content h2 {
  margin-top: 3rem;
}

.page-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-item {
  display: block;
  padding: 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: border-color 0.2s;
}

.page-item:hover {
  border-color: var(--accent-color);
}

.page-item h4 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.page-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Responsive */
@media (max-width: 1200px) {
  .toc {
    display: none;
  }
}

@media (max-width: 768px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .main {
    padding: 1.5rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .prev-next {
    flex-direction: column;
  }
}