:root {
  --color-bg: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #1c2129;
  --color-border: #30363d;
  --color-text: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;
  --color-primary: #58a6ff;
  --color-primary-hover: #79c0ff;
  --color-accent: #3fb950;
  --color-accent-orange: #d29922;
  --color-accent-red: #f85149;
  --color-accent-purple: #bc8cff;
  --color-code-bg: #0d1117;
  --color-code-border: #30363d;
  --color-sidebar-bg: #0d1117;
  --color-sidebar-hover: #1c2129;
  --color-header-bg: #010409;
  --sidebar-width: 280px;
  --header-height: 60px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* ── Header ─────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-header-bg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 100;
}
.site-header .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-header .logo:hover {
  text-decoration: none;
}
.site-header .logo .logo-icon {
  font-size: 1.5rem;
}
.header-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 20px;
}
.header-nav a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.header-nav a:hover {
  color: var(--color-text);
  text-decoration: none;
}
.github-link {
  display: flex;
  align-items: center;
  gap: 6px;
}
.github-link svg {
  width: 20px;
  height: 20px;
  fill: var(--color-text-secondary);
  transition: fill 0.2s;
}
.github-link:hover svg {
  fill: var(--color-text);
}

/* ── Sidebar ────────────────────────────────── */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  padding: 16px 0;
  z-index: 50;
}
.sidebar-section {
  padding: 0 16px;
  margin-bottom: 8px;
}
.sidebar-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  padding: 8px 12px 4px;
}
.sidebar-nav a {
  display: block;
  padding: 6px 12px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  border-radius: 6px;
  transition: all 0.15s;
}
.sidebar-nav a:hover {
  background: var(--color-sidebar-hover);
  color: var(--color-text);
  text-decoration: none;
}
.sidebar-nav a.active {
  background: rgba(88, 166, 255, 0.1);
  color: var(--color-primary);
  font-weight: 500;
}

/* ── Main Content ───────────────────────────── */
.layout-wrapper {
  display: flex;
  margin-top: var(--header-height);
}
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: calc(100vh - var(--header-height));
  max-width: 900px;
  padding: 40px 48px 80px;
}

/* ── Typography ─────────────────────────────── */
.main-content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}
.main-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 16px;
  color: var(--color-text);
}
.main-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--color-text);
}
.main-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}
.main-content p {
  margin-bottom: 16px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.main-content ul,
.main-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}
.main-content li {
  margin-bottom: 6px;
  color: var(--color-text-secondary);
}
.main-content strong {
  color: var(--color-text);
  font-weight: 600;
}
.main-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 12px 20px;
  margin: 16px 0;
  background: var(--color-bg-secondary);
  border-radius: 0 6px 6px 0;
}
.main-content blockquote p {
  margin-bottom: 0;
}
.main-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
}
.main-content th {
  text-align: left;
  padding: 10px 16px;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 600;
}
.main-content td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}
.main-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-primary-hover);
}
.main-content pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-code-border);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 16px 0 24px;
  overflow-x: auto;
  line-height: 1.5;
}
.main-content pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: var(--color-text);
  font-size: 0.85rem;
}
.main-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 32px 0;
}

/* ── Homepage ───────────────────────────────── */
.hero {
  text-align: center;
  padding: 80px 24px 60px;
  max-width: 800px;
  margin: 0 auto;
}
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  border-bottom: none;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero .tagline {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}
.hero-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  text-decoration: none;
}
.btn-secondary {
  background: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-bg-tertiary);
  text-decoration: none;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin: 48px 0;
  padding: 0 24px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}
.feature-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
}
.feature-card .icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}
.feature-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}
.install-block {
  max-width: 480px;
  margin: 32px auto;
  background: var(--color-code-bg);
  border: 1px solid var(--color-code-border);
  border-radius: 8px;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-accent);
}

/* ── API Reference specific ─────────────────── */
.class-header {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 24px 0 16px;
}
.class-decorators {
  margin-bottom: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.decorator-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent-orange);
  background: rgba(210, 153, 34, 0.1);
  border: 1px solid rgba(210, 153, 34, 0.25);
  padding: 2px 10px;
  border-radius: 20px;
  line-height: 1.5;
}
.class-header h3 {
  margin: 0 0 4px;
  color: var(--color-accent-purple);
  font-family: var(--font-mono);
  font-size: 1.15rem;
}
.class-header h3 .kw {
  color: var(--color-primary);
  font-weight: 400;
  font-size: 0.85em;
}
.class-header p {
  margin: 4px 0 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.method-signature {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--color-bg-tertiary);
  padding: 10px 16px;
  border-radius: 6px;
  border-left: 3px solid var(--color-accent-purple);
  margin: 12px 0 8px;
  overflow-x: auto;
}
.param-table {
  margin: 8px 0 24px;
}
.param-table th {
  font-size: 0.8rem;
}
.param-table td {
  font-size: 0.8rem;
}

/* ── Callouts ───────────────────────────────── */
.callout {
  border-radius: 8px;
  padding: 16px 20px;
  margin: 16px 0 24px;
  border-left: 4px solid;
}
.callout-info {
  background: rgba(88, 166, 255, 0.08);
  border-left-color: var(--color-primary);
}
.callout-warning {
  background: rgba(210, 153, 34, 0.08);
  border-left-color: var(--color-accent-orange);
}
.callout-tip {
  background: rgba(63, 185, 80, 0.08);
  border-left-color: var(--color-accent);
}
.callout-title {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 6px;
}
.callout p {
  margin: 0;
  font-size: 0.875rem;
}

/* ── Footer ─────────────────────────────────── */
.site-footer {
  margin-left: var(--sidebar-width);
  padding: 24px 48px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-align: center;
}

/* ── Homepage layout (no sidebar) ───────────── */
.home-main {
  margin-left: 0;
  max-width: 100%;
  padding: 0;
}
.home-footer {
  margin-left: 0;
}

/* ── Mobile responsive ──────────────────────── */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-right: 8px;
}
.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  border-radius: 2px;
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content,
  .site-footer {
    margin-left: 0;
    padding-left: 20px;
    padding-right: 20px;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
    padding: 0 16px;
  }
}