/* GitBook-style Documentation Theme */
* { 
  box-sizing: border-box; 
  margin: 0;
  padding: 0;
}

:root {
  /* Light theme */
  --bg: #ffffff;
  --bg-secondary: #f7f8f9;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --sidebar-bg: #ffffff;
  --navbar-bg: #ffffff;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --code-bg: #f3f4f6;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
  
  /* Transition duration */
  --theme-transition: 0.3s ease;
}

[data-theme="dark"] {
  /* Dark theme */
  --bg: #0f1419;
  --bg-secondary: #1a1f2e;
  --text: #e6edf3;
  --text-secondary: #8b949e;
  --border: #30363d;
  --sidebar-bg: #161b22;
  --navbar-bg: #0d1117;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --code-bg: #161b22;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-lg: rgba(0, 0, 0, 0.5);
}

html, body { 
  height: 100%; 
  margin: 0;
  scroll-behavior: smooth;
  overflow-x: hidden;
  transition: background-color var(--theme-transition), color var(--theme-transition);
}

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

#app {
  display: grid;
  grid-template-rows: 60px 1fr;
  grid-template-columns: 280px 1fr;
  grid-template-areas:
    "navbar navbar"
    "sidebar content";
  min-height: 100vh;
}

/* ===== NAVBAR ===== */
.navbar {
  grid-area: navbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: var(--navbar-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 3px var(--shadow);
  transition: background-color var(--theme-transition), border-color var(--theme-transition), box-shadow var(--theme-transition);
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 0 0 auto;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: all 0.2s;
}

.sidebar-toggle:hover {
  background: var(--bg-secondary);
  color: var(--text);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}

.navbar-brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.navbar-center {
  flex: 1;
  max-width: 600px;
  margin: 0 24px;
}

.search-wrapper {
  position: relative;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
}

.search {
  width: 100%;
  background: var(--bg-secondary);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 40px 10px 40px;
  font-size: 14px;
  transition: all 0.2s, background-color var(--theme-transition), color var(--theme-transition), border-color var(--theme-transition);
  font-family: inherit;
}

.search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  background: var(--bg);
}

.search::placeholder {
  color: var(--text-secondary);
}

.search-kbd {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 11px;
  font-family: monospace;
  color: var(--text-secondary);
  pointer-events: none;
  transition: background-color var(--theme-transition), border-color var(--theme-transition), color var(--theme-transition);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.nav-separator {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 4px;
}

.nav-link,
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
  text-decoration: none;
}

.nav-link:hover,
.theme-toggle:hover {
  background: var(--bg-secondary);
  color: var(--text);
}

.theme-toggle .sun-icon {
  display: none;
}

.theme-toggle .moon-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

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

/* ===== SIDEBAR ===== */
.sidebar {
  grid-area: sidebar;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  height: calc(100vh - 60px);
  position: sticky;
  top: 60px;
  transition: background-color var(--theme-transition), border-color var(--theme-transition);
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

.nav {
  padding: 20px 16px;
}

.nav-section {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  padding: 16px 12px 8px;
  margin-top: 16px;
}

.nav-section:first-child {
  margin-top: 0;
}

.nav a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 12px;
  margin: 2px 0;
  border-radius: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  transition: all 0.15s ease;
  position: relative;
}

.nav-icon {
  width: 18px;
  flex: 0 0 18px;
  text-align: center;
  font-size: 13px;
  line-height: 1;
}

.nav-text {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.nav-label {
  min-width: 0;
  line-height: 1.2;
}

.nav-snippet {
  margin-top: 2px;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.35;
}

.nav-empty {
  margin: 4px 0;
  padding: 10px 12px;
  border-radius: 6px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.5;
}

.nav-empty code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 4px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 12px;
}

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

.nav a.active {
  background: var(--bg-secondary);
  color: var(--accent);
  font-weight: 500;
}

.nav a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

/* ===== CONTENT ===== */
.content {
  grid-area: content;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg);
  transition: background-color var(--theme-transition);
}

.page-container {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 40px;
  padding: 40px 48px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  flex: 1;
}

/* ===== DOCUMENTATION CONTENT ===== */
.doc {
  max-width: 800px;
  min-width: 0;
}

.doc h1 {
  font-size: 40px;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text);
}

.doc h2 {
  font-size: 28px;
  font-weight: 600;
  margin: 48px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text);
  scroll-margin-top: 80px;
}

.doc h2:first-child {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.doc h3 {
  font-size: 22px;
  font-weight: 600;
  margin: 32px 0 12px;
  letter-spacing: -0.01em;
  color: var(--text);
  scroll-margin-top: 80px;
}

.doc h4 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text);
}

.doc p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 16px 0;
  font-size: 16px;
}

.doc ul,
.doc ol {
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 28px;
  margin: 16px 0;
}

.doc li {
  margin: 8px 0;
}

.doc li > p {
  margin: 4px 0;
}

.doc code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 3px 6px;
  border-radius: 4px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--accent);
  transition: background-color var(--theme-transition), border-color var(--theme-transition), color var(--theme-transition);
}

.doc pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 20px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 20px 0;
  line-height: 1.6;
  transition: background-color var(--theme-transition), border-color var(--theme-transition);
}

.doc pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 14px;
}

.doc a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}

.doc a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.doc .anchor {
  color: var(--border);
  text-decoration: none;
  margin-left: -24px;
  padding-right: 8px;
  opacity: 0;
  transition: opacity 0.15s;
}

.doc h2:hover .anchor,
.doc h3:hover .anchor {
  opacity: 1;
}

.doc table {
  border-collapse: collapse;
  width: 100%;
  margin: 24px 0;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.doc th,
.doc td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
}

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

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

.doc blockquote {
  border-left: 4px solid var(--accent);
  padding: 4px 0 4px 20px;
  margin: 20px 0;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: 0 4px 4px 0;
}

.doc blockquote p {
  margin: 12px 0;
}

.doc img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 24px 0;
  border: 1px solid var(--border);
}

.doc hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* Loading and Error States */
.loading {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-secondary);
  font-size: 16px;
}

.error {
  padding: 40px;
  background: var(--bg-secondary);
  border: 2px solid #ef4444;
  border-radius: 8px;
  margin: 20px 0;
}

.error h1 {
  color: #ef4444;
  margin-top: 0;
}

/* ===== TABLE OF CONTENTS ===== */
.toc {
  position: sticky;
  top: 100px;
  align-self: start;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  padding: 0;
}

.toc::-webkit-scrollbar {
  width: 4px;
}

.toc::-webkit-scrollbar-track {
  background: transparent;
}

.toc::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.toc h4 {
  margin: 0 0 12px;
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 700;
}

.toc a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 0 6px 12px;
  font-size: 13px;
  line-height: 1.5;
  transition: all 0.15s;
  border-left: 2px solid transparent;
}

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

.toc a.active {
  color: var(--accent);
  font-weight: 500;
  border-left-color: var(--accent);
}

.toc .lvl-2 {
  padding-left: 12px;
}

.toc .lvl-3 {
  padding-left: 24px;
  font-size: 12px;
}

/* ===== FOOTER ===== */
.page-footer {
  border-top: 1px solid var(--border);
  padding: 24px 48px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  transition: background-color var(--theme-transition), border-color var(--theme-transition), color var(--theme-transition);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

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

.separator {
  color: var(--border);
}

.footer-info {
  color: var(--text-secondary);
  font-size: 13px;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
  .page-container {
    grid-template-columns: 1fr 200px;
    gap: 32px;
    padding: 32px 32px;
  }
}

@media (max-width: 1000px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-areas:
      "navbar"
      "content";
  }

  .sidebar {
    position: fixed;
    left: -280px;
    top: 60px;
    width: 280px;
    height: calc(100vh - 60px);
    z-index: 90;
    transition: left 0.3s ease;
    box-shadow: 2px 0 8px var(--shadow-lg);
  }

  .sidebar.open {
    left: 0;
  }

  .sidebar-toggle {
    display: block;
  }

  .page-container {
    grid-template-columns: 1fr;
    padding: 24px 20px;
  }

  .toc {
    display: none;
  }

  .navbar-center {
    margin: 0 16px;
  }

  .search-kbd {
    display: none;
  }

  .page-footer {
    flex-direction: column;
    gap: 12px;
    padding: 20px;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .navbar {
    padding: 0 16px;
  }

  .navbar-brand span {
    display: none;
  }

  .navbar-center {
    margin: 0 12px;
  }

  .search {
    font-size: 13px;
    padding: 8px 36px 8px 36px;
  }

  .doc h1 {
    font-size: 32px;
  }

  .doc h2 {
    font-size: 24px;
  }

  .doc h3 {
    font-size: 20px;
  }

  .page-container {
    padding: 20px 16px;
  }

  .page-footer {
    padding: 16px;
  }
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 89;
}

.sidebar-overlay.active {
  display: block;
}