:root {
  /* Light theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #e8e8e8;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-tertiary: #6a6a6a;
  --accent-primary: #0066cc;
  --accent-secondary: #0052a3;
  --border-color: #d0d0d0;
  --shadow: rgba(0, 0, 0, 0.1);
  --code-bg: #f8f8f8;
  --code-border: #e0e0e0;
}

[data-theme="dark"] {
  /* Dark theme */
  --bg-primary: #1a1a1a;
  --bg-secondary: #2a2a2a;
  --bg-tertiary: #3a3a3a;
  --text-primary: #e8e8e8;
  --text-secondary: #c8c8c8;
  --text-tertiary: #a8a8a8;
  --accent-primary: #4da6ff;
  --accent-secondary: #66b3ff;
  --border-color: #404040;
  --shadow: rgba(0, 0, 0, 0.3);
  --code-bg: #252525;
  --code-border: #404040;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

a:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Header */
header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  flex: 1;
  justify-content: center;
}

.nav-menu a {
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  display: block;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
}

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

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.5rem;
  cursor: pointer;
  font-size: 1.2rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
}

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

[data-theme="dark"] .theme-icon-dark {
  color: white;
}

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

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

.search-container {
  display: flex;
  gap: 0.5rem;
}

#search-input {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-width: 200px;
  font-size: 0.9rem;
}

#search-input:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 0;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  width: 44px;
  height: 44px;
  justify-content: center;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all 0.3s ease;
}

/* Main content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  min-height: calc(100vh - 200px);
}

main h1,
main h2,
main h3,
main h4 {
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: var(--text-primary);
}

main h1 {
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
}

main h2 {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.3rem;
  margin-top: 2em;
}

main p,
main ul,
main ol,
main table {
  margin-bottom: 1.2rem;
}

main li {
  margin-bottom: 0.5rem;
}

/* Cards */
.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: 0 4px 12px var(--shadow);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-title {
  font-size: 1.25rem;
  margin: 0;
}

.card-title a {
  color: var(--text-primary);
}

.version-badge {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background-color: var(--accent-primary);
  color: white;
  border-radius: 4px;
}

.version-badge.deprecated {
  background-color: #cc0000;
}

.card-signature {
  margin: 1rem 0;
  padding: 0.75rem;
  background-color: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 4px;
  overflow-x: auto;
}

.card-signature code {
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
}

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

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  color: var(--text-secondary);
}

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

.card-sandbox-btn {
  background-color: var(--accent-primary);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.card-sandbox-btn:hover {
  background-color: var(--accent-secondary);
}

/* Footer */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
  padding: 2rem 0;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-section h3,
.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-bottom .disclaimer {
  margin-top: 0.5rem;
  font-style: italic;
}

/* Code blocks */
pre {
  background-color: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

code {
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
}

pre code {
  color: var(--text-primary);
}

/* Language switcher */
.language-switcher {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-right: 0.5rem;
}

.lang-link {
  color: var(--text-primary);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 500;
}

.lang-link:hover,
.lang-link.active {
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
}

.lang-separator {
  color: var(--text-tertiary);
}

/* Search results */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: 0 4px 12px var(--shadow);
  max-height: 400px;
  overflow-y: auto;
  display: none;
  z-index: 1000;
  margin-top: 0.5rem;
}

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

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

.search-result-item {
  border-bottom: 1px solid var(--border-color);
}

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

.search-result-item a {
  display: block;
  padding: 1rem;
  color: var(--text-primary);
  text-decoration: none;
}

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

.search-result-item h4 {
  margin: 0 0 0.5rem 0;
  font-size: 1rem;
  color: var(--accent-primary);
}

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

.search-no-results,
.search-error {
  padding: 1rem;
  text-align: center;
  color: var(--text-secondary);
}

.search-container {
  position: relative;
}

/* TOC */
.toc {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
}

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

.toc li {
  margin: 0.5rem 0;
}

.toc a {
  color: var(--text-primary);
  text-decoration: none;
  display: block;
  padding: 0.25rem 0;
}

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

.toc-h3 {
  padding-left: 1rem;
  font-size: 0.9rem;
}

/* Code blocks */
pre {
  position: relative;
}

.code-buttons {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  gap: 0.5rem;
  z-index: 10;
}

.copy-button,
.try-button {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  cursor: pointer;
  color: var(--text-primary);
  min-height: 32px;
  white-space: nowrap;
  transition: background-color 0.2s, color 0.2s;
}

.copy-button:hover,
.try-button:hover {
  background-color: var(--accent-primary);
  color: white;
}

.try-button i {
  margin-right: 0.25rem;
}

/* Sandbox - Modern Dark Editor */
.sandbox-container {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0;
  background-color: var(--bg-secondary);
  box-shadow: 0 4px 15px var(--shadow);
}

.sandbox-editor {
  width: 100%;
  min-height: 250px;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 1rem;
  padding: 1.5rem;
  border: 1px solid #333;
  border-radius: 8px;
  background-color: #1e1e1e; /* Visual contrast */
  color: #d4d4d4;
  resize: vertical;
  line-height: 1.5;
  outline: none;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}

.sandbox-editor:focus {
  border-color: var(--accent-primary);
}

.sandbox-controls {
  display: flex;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.sandbox-run,
.sandbox-clear,
.sandbox-reset {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  min-height: 44px;
  transition: all 0.2s ease;
}

.sandbox-run {
  background-color: #28a745;
  color: white;
}

.sandbox-run:hover:not(:disabled) {
  background-color: #218838;
  transform: scale(1.02);
}

.sandbox-run:disabled {
  background-color: #6c757d;
  cursor: not-allowed;
  opacity: 0.7;
}

.sandbox-clear,
.sandbox-reset {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.sandbox-clear:hover,
.sandbox-reset:hover {
  background-color: var(--bg-primary);
}

.sandbox-output {
  padding: 1.25rem;
  border-radius: 8px;
  background-color: #0c0c0c;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.95rem;
  white-space: pre-wrap;
  min-height: 60px;
  color: #f1f1f1;
  border-left: 4px solid #444;
}

.sandbox-output.success {
  border-left-color: #28a745;
}

.sandbox-output.error {
  color: #ff6b6b;
  border-left-color: #ff6b6b;
}

.sandbox-loading {
  padding: 1rem;
  text-align: center;
  color: var(--accent-primary);
  font-weight: bold;
}


/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-wrap: wrap;
    padding: 1rem;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    margin-top: 1rem;
  }

  .nav-menu.active {
    display: flex;
  }

  .header-actions {
    flex-wrap: wrap;
    width: 100%;
    margin-top: 1rem;
  }

  .language-switcher {
    order: -1;
  }

  .search-container {
    width: 100%;
    order: 1;
  }

  #search-input {
    min-width: 150px;
    flex: 1;
  }

  main {
    padding: 1rem;
  }

  .footer-container {
    grid-template-columns: 1fr;
  }

  .toc {
    padding: 1rem;
  }
}

/* Comparison tables */
.comparison-table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

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

.comparison-table th {
  background-color: var(--bg-tertiary);
  font-weight: bold;
  color: var(--text-primary);
}

.comparison-table td.comparison-feature {
  font-weight: 500;
  background-color: var(--bg-tertiary);
}

.comparison-table td.comparison-value.green {
  background-color: rgba(0, 200, 0, 0.1);
}

.comparison-table td.comparison-value.yellow {
  background-color: rgba(255, 200, 0, 0.1);
}

.comparison-table td.comparison-value.red {
  background-color: rgba(200, 0, 0, 0.1);
}

/* Global Sidebar Styles */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.global-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  z-index: 1000;
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: 2px 0 12px var(--shadow);
}

.global-sidebar.active {
  transform: translateX(0);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-primary);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0;
}

.sidebar-menu {
  list-style: none;
  padding: 0 1rem;
}

.sidebar-menu li {
  margin-bottom: 0.25rem;
}

.sidebar-link {
  display: block;
  padding: 0.6rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 6px;
  transition: background-color 0.2s;
  font-weight: 500;
}

.sidebar-link:hover {
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
}

.sidebar-link.active {
  background-color: var(--accent-primary);
  color: white;
}

.sidebar-divider {
  border: 0;
  height: 1px;
  background-color: var(--border-color);
  margin: 1rem 1.5rem;
}

/* Accordions */
.accordion {
  margin: 0 1rem 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  text-align: left;
  background-color: var(--bg-secondary);
  border: none;
  padding: 0.8rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s;
}

.accordion-header:hover {
  background-color: var(--bg-tertiary);
}

.accordion-icon {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
}

.accordion.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 0.5rem 1rem 1rem;
  background-color: var(--bg-primary);
}

.accordion.active .accordion-content {
  display: block;
}

/* Grouping inside accordion */
.sidebar-group {
  margin-top: 1rem;
}

.sidebar-group:first-child {
  margin-top: 0;
}

.sidebar-group strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--border-color);
}

.accordion-content .sidebar-link {
  padding: 0.4rem 0.5rem;
  font-size: 0.9rem;
  font-weight: 400;
}

.accordion-content .sidebar-link.active {
  background-color: transparent;
  color: var(--accent-primary);
  font-weight: bold;
}