/* ========================================
   GitBook Style Documentation Theme
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #1976d2;
  --color-primary-dark: #115293;
  --color-primary-light: #42a5f5;
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-border: #e0e0e0;
  --color-border-light: #f0f0f0;
  --color-bg: #ffffff;
  --color-bg-secondary: #fafafa;
  --color-bg-hover: #f5f5f5;

  /* Sidebar */
  --sidebar-width: 300px;
  --sidebar-bg: #f5f5f5;
  --sidebar-text: #333333;
  --sidebar-text-active: #1976d2;
  --sidebar-border: #e0e0e0;

  /* Header */
  --header-height: 50px;
  --header-bg: #ffffff;
  --header-border: #e0e0e0;

  /* Content */
  --content-max-width: 900px;
  --content-padding: 40px;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: "SF Mono", Monaco, Inconsolata, "Fira Code", monospace;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-xs: 12px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-xxl: 32px;
  --line-height-base: 1.6;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.15);
}

/* Dark Theme */
[data-theme="dark"] {
  --color-text: #e0e0e0;
  --color-text-secondary: #b0b0b0;
  --color-text-muted: #808080;
  --color-border: #404040;
  --color-border-light: #333333;
  --color-bg: #1a1a1a;
  --color-bg-secondary: #252525;
  --color-bg-hover: #333333;

  --sidebar-bg: #252525;
  --sidebar-text: #e0e0e0;
  --sidebar-border: #404040;

  --header-bg: #1a1a1a;
  --header-border: #404040;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ========================================
   Layout
   ======================================== */

.app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition-base), background-color var(--transition-base);
}

.sidebar-header {
  padding: var(--space-md);
  border-bottom: 1px solid var(--sidebar-border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar-header__logo {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.sidebar-header__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--sidebar-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-search {
  padding: var(--space-md);
  border-bottom: 1px solid var(--sidebar-border);
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input-wrapper i {
  position: absolute;
  left: var(--space-sm);
  color: var(--color-text-muted);
}

.search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-sm) var(--space-sm) var(--space-xl);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: var(--font-size-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

/* Navigation */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm) 0;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover {
  background-color: var(--color-bg-hover);
}

.nav-link.active {
  color: var(--color-primary);
  background-color: rgba(25, 118, 210, 0.1);
  font-weight: 500;
}

.nav-link__toggle {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-sm);
  transition: transform var(--transition-fast);
  color: var(--color-text-muted);
}

.nav-link__toggle.expanded {
  transform: rotate(90deg);
}

.nav-link__icon {
  width: 16px;
  height: 16px;
  margin-right: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.nav-link__text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-children {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-base);
}

.nav-children.expanded {
  max-height: 2000px;
}

.nav-children .nav-link {
  padding-left: calc(var(--space-md) + 32px);
}

.nav-children .nav-children .nav-link {
  padding-left: calc(var(--space-md) + 48px);
}

/* Main Content */
.main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background-color: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  z-index: 90;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Search Box */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box .search-icon {
  position: absolute;
  left: 10px;
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-input {
  width: 200px;
  height: 36px;
  padding: 0 12px 0 32px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  width: 280px;
}

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

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 4px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  box-shadow: var(--shadow-lg);
  max-height: 400px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
}

.search-results.active {
  display: block;
}

.search-no-results {
  padding: 16px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.search-result-item {
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color var(--transition-fast);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover,
.search-result-item.active {
  background-color: var(--color-bg-hover);
}

.search-result-item--heading {
  background-color: var(--color-bg-secondary);
}

.search-result-heading {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  margin-bottom: 4px;
  font-weight: 500;
}

.search-result-text {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.search-result-text mark {
  background: var(--color-primary-light);
  color: inherit;
  padding: 0 2px;
  border-radius: 2px;
}

/* Highlight target animation */
.highlight-target {
  animation: highlight-pulse 2s ease;
}

@keyframes highlight-pulse {
  0% {
    background-color: var(--color-primary-light);
  }
  100% {
    background-color: transparent;
  }
}

/* Dark theme adjustments */
[data-theme="dark"] .search-results {
  background: var(--color-bg);
  border-color: var(--color-border);
}

[data-theme="dark"] .search-input {
  background: var(--color-bg-secondary);
  border-color: var(--color-border);
}

[data-theme="dark"] .search-result-text mark {
  background: var(--color-primary-dark);
  color: #fff;
}

.header-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: 4px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.header-btn:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-text);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

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

/* Content Area */
.content {
  flex: 1;
  padding: var(--content-padding);
  max-width: calc(var(--content-max-width) + var(--content-padding) * 2);
  margin: 0 auto;
  width: 100%;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-xxl);
  margin-top: 0;
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-primary);
}

h2 {
  font-size: var(--font-size-xl);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

h3 {
  font-size: var(--font-size-lg);
}

h4 {
  font-size: var(--font-size-base);
}

p {
  margin-top: 0;
  margin-bottom: var(--space-md);
}

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

a:hover {
  text-decoration: underline;
}

/* ========================================
   Content Elements
   ======================================== */

.content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
}

.content figure {
  margin: var(--space-lg) 0;
}

.content figcaption {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
}

/* Tables */
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: var(--font-size-sm);
}

.content th,
.content td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

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

.content tr:nth-child(even) {
  background-color: var(--color-bg-secondary);
}

/* Lists */
.content ul,
.content ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-xl);
}

.content li {
  margin-bottom: var(--space-xs);
}

/* Code */
.content code {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  background-color: var(--color-bg-secondary);
  border-radius: 3px;
  color: var(--color-primary-dark);
}

.content pre {
  background-color: var(--color-bg-secondary);
  padding: var(--space-md);
  border-radius: 4px;
  overflow-x: auto;
  margin: var(--space-lg) 0;
}

.content pre code {
  background: none;
  padding: 0;
}

/* Blockquotes */
.content blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-bg-secondary);
  font-style: italic;
}

/* Horizontal Rule */
.content hr {
  border: none;
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-xl) 0;
}

/* ========================================
   Navigation Footer
   ======================================== */

.nav-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.nav-footer__link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  color: var(--color-text);
  text-decoration: none;
  border-radius: 4px;
  transition: background-color var(--transition-fast);
}

.nav-footer__link:hover {
  background-color: var(--color-bg-secondary);
  text-decoration: none;
}

.nav-footer__link--next {
  text-align: right;
  margin-left: auto;
}

.nav-footer__label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.nav-footer__title {
  font-weight: 500;
  color: var(--color-primary);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-fast);
  z-index: 80;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ========================================
   Mobile Toggle
   ======================================== */

.mobile-toggle {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  border-radius: 4px;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
  :root {
    --sidebar-width: 280px;
    --content-padding: 20px;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main {
    margin-left: 0;
  }

  .mobile-toggle {
    display: flex;
  }

  .search-input {
    width: 120px;
    font-size: var(--font-size-xs);
  }

  .search-input:focus {
    width: 160px;
  }

  .search-results {
    position: fixed;
    top: 50px;
    left: 10px;
    right: 10px;
    max-height: 60vh;
  }

  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
  }

  .sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  .nav-footer {
    flex-direction: column;
    gap: var(--space-md);
  }

  .nav-footer__link--next {
    margin-left: 0;
    text-align: left;
  }
}

/* ========================================
   Print
   ======================================== */

@media print {
  .sidebar,
  .header,
  .back-to-top,
  .nav-footer {
    display: none;
  }

  .main {
    margin-left: 0;
  }

  .content {
    max-width: none;
    padding: 0;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }

  img {
    page-break-inside: avoid;
  }
}

/* ========================================
   Utilities
   ======================================== */

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}