:root {
      --bg-light: #f9f9fb;
      --text-light: #222;
      --header-bg-light: #22223b;
      --header-text-light: #fff;
      --nav-bg-light: #fff;
      --nav-text-light: #22223b;
      --nav-link-hover-light: #d64500;
      --main-bg-light: #fff;
      --border-light: #e0e0ef;
      --heading-color-light: #22223b;
      --subheading-color-light: #4a4e69;
      --code-bg-light: #f4f4f8;
      --code-text-light: #22223b;
      --table-bg-light: #fafaff;
      --table-even-row-light: #f7f7fa;
      --example-bg-light: #f4f4f8;
      --example-border-light: #ff7f00; /* Orange for example border */
      --anchor-color-light: #ff7f00; /* Orange for anchors */
      --link-color: #ff7f00;

      /* Orange theme colors */
      --primary-color: #ff7f00; /* Medium Orange */
      --secondary-color: #ffa500; /* Darker Orange for accents */
      --tertiary-color: #ffcc99; /* Lighter Orange */

      /* Dark mode colors */
      --bg-dark: #282c34;
      --text-dark: #abb2bf;
      --header-bg-dark: #21252b;
      --header-text-dark: #e0e0e0;
      --nav-bg-dark: #3a404b;
      --nav-text-dark: #abb2bf;
      --nav-link-hover-dark: #ff7f00;
      --main-bg-dark: #323842;
      --border-dark: #444a54;
      --heading-color-dark: #e0e0e0;
      --subheading-color-dark: #c0c5cd;
      --code-bg-dark: #21252b;
      --code-text-dark: #abb2bf;
      --table-bg-dark: #3a404b;
      --table-even-row-dark: #323842;
      --example-bg-dark: #3a404b;
      --example-border-dark: #ff7f00;
      --anchor-color-dark: #ff7f00;
    }

    body {
      font-family: 'Segoe UI', Arial, sans-serif;
      background: var(--bg-light);
      color: var(--text-light);
      margin: 0;
      padding: 0;
      transition: background 0.3s, color 0.3s;
    }

    body.dark-mode {
      background: var(--bg-dark);
      color: var(--text-dark);
    }

    body.dark-mode {
      --link-color: #ffa500;
    }

    header {
      background: var(--primary-color); /* Header remains orange */
      color: var(--header-text-light);
      padding: 2rem 0 1rem 0;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      position: relative;
      transition: color 0.3s; /* Only transition text color */
    }

    body.dark-mode header {
      color: var(--header-text-dark);
      /* Background color is intentionally not changed for dark mode */
    }

    header h1 {
      margin: 0;
      font-size: 2.5rem;
      letter-spacing: 1px;
    }
    header p {
      margin: 0.5rem 0 0 0;
      font-size: 1.1rem;
      color: var(--header-text-light);
    }

    body.dark-mode header p {
      color: var(--header-text-dark);
    }

    .container {
      display: flex;
      max-width: 1400px;
      margin: 0 auto;
      padding: 2rem 1rem 3rem 1rem;
      gap: 2rem;
    }
    nav {
      min-width: 270px;
      max-width: 320px;
      background: var(--nav-bg-light);
      border-radius: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.06);
      padding: 1.5rem 1rem 1.5rem 1.5rem;
      position: sticky;
      top: 2rem;
      max-height: calc(100vh - 4rem); /* Set max height to enable scrolling */
      overflow-y: auto;
      transition: background 0.3s, box-shadow 0.3s;
    }

    body.dark-mode nav {
      background: var(--nav-bg-dark);
      box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }

    nav h2 {
      font-size: 1.2rem;
      margin-top: 0;
      color: var(--subheading-color-light);
      margin-bottom: 1rem;
    }

    body.dark-mode nav h2 {
      color: var(--subheading-color-dark);
    }

    nav ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    nav ul ul {
      margin-left: 1.2em;
      margin-bottom: 0.5em;
    }
    nav li {
      margin-bottom: 0.3em;
    }
    nav a {
      color: var(--link-color);
      text-decoration: none;
      font-size: 1rem;
      transition: color 0.2s;
    }

    body.dark-mode nav a {
      color: var(--link-color);
    }

    nav a:hover {
      color: var(--nav-link-hover-light);
      text-decoration: underline;
    }

    body.dark-mode nav a:hover {
      color: var(--nav-link-hover-dark);
    }

    main {
      flex: 1;
      background: var(--main-bg-light);
      border-radius: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.06);
      padding: 2rem 2.5rem 2rem 2.5rem;
      min-width: 0;
      transition: background 0.3s, box-shadow 0.3s;
    }

    body.dark-mode main {
      background: var(--main-bg-dark);
      box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }

    h2 {
      color: var(--heading-color-light);
      border-bottom: 2px solid var(--border-light);
      padding-bottom: 0.2em;
      margin-top: 2.5em;
      margin-bottom: 1.2em;
      font-size: 2rem;
      transition: color 0.3s, border-color 0.3s;
    }

    body.dark-mode h2 {
      color: var(--heading-color-dark);
      border-color: var(--border-dark);
    }

    h3 {
      color: var(--subheading-color-light);
      margin-top: 2em;
      margin-bottom: 0.8em;
      font-size: 1.3rem;
      border-left: 4px solid var(--primary-color); /* Orange accent */
      padding-left: 0.5em;
      transition: color 0.3s, border-color 0.3s;
    }

    body.dark-mode h3 {
      color: var(--subheading-color-dark);
      border-color: var(--primary-color);
    }

    h4 {
      color: var(--subheading-color-light);
      margin-top: 1.5em;
      margin-bottom: 0.5em;
      font-size: 1.1rem;
      margin-left: 0.5em;
      font-weight: 500;
      transition: color 0.3s;
    }

    body.dark-mode h4 {
      color: var(--subheading-color-dark);
    }

    h4 code {
      background: var(--code-bg-light);
      padding: 0.2em 0.4em;
      border-radius: 4px;
      font-size: 0.95em;
      transition: background 0.3s, color 0.3s;
    }

    body.dark-mode h4 code {
      background: var(--code-bg-dark);
      color: var(--code-text-dark);
    }

    .anchor {
      color: var(--anchor-color-light);
      text-decoration: none;
      margin-left: 0.3em;
      font-size: 0.9em;
      vertical-align: middle;
      transition: color 0.3s;
    }

    body.dark-mode .anchor {
      color: var(--anchor-color-dark);
    }

    code, pre {
      font-family: 'Fira Mono', 'Consolas', 'Menlo', monospace;
      font-size: 1em;
      background: var(--code-bg-light);
      color: var(--code-text-light);
      border-radius: 6px;
      transition: background 0.3s, color 0.3s;
    }

    body.dark-mode code, body.dark-mode pre {
      background: var(--code-bg-dark);
      color: var(--code-text-dark);
    }

    pre {
      padding: 1em;
      margin: 1em 0;
      overflow-x: auto;
      border: 1px solid var(--border-light);
      background: var(--code-bg-light);
      transition: border-color 0.3s, background 0.3s;
    }

    body.dark-mode pre {
      border: 1px solid var(--border-dark);
      background: var(--code-bg-dark);
    }

    table {
      border-collapse: collapse;
      width: 100%;
      margin: 1.5em 0;
      background: var(--table-bg-light);
      transition: background 0.3s;
    }

    body.dark-mode table {
      background: var(--table-bg-dark);
    }

    th, td {
      border: 1px solid var(--border-light);
      padding: 0.5em 0.8em;
      text-align: left;
      transition: border-color 0.3s;
    }

    body.dark-mode th, body.dark-mode td {
      border-color: var(--border-dark);
    }

    th {
      background: var(--code-bg-light);
      color: var(--subheading-color-light);
      transition: background 0.3s, color 0.3s;
    }

    body.dark-mode th {
      background: var(--code-bg-dark);
      color: var(--subheading-color-dark);
    }

    tr:nth-child(even) {
      background: var(--table-even-row-light);
      transition: background 0.3s;
    }

    body.dark-mode tr:nth-child(even) {
      background: var(--table-even-row-dark);
    }

    .example {
      background: var(--example-bg-light);
      border-left: 4px solid var(--example-border-light);
      padding: 0.7em 1em;
      margin: 1em 0;
      font-size: 0.98em;
      transition: background 0.3s, border-color 0.3s;
    }

    body.dark-mode .example {
      background: var(--example-bg-dark);
      border-color: var(--example-border-dark);
    }

    footer {
      background: var(--primary-color);
      color: var(--header-text-light);
      text-align: center;
      padding: 1.5em 0 1em 0;
      margin-top: 3em;
      font-size: 1em;
      border-top: 1px solid var(--border-light);
      transition: background 0.3s, color 0.3s, border-color 0.3s;
    }

    body.dark-mode footer {
      background: var(--secondary-color);
      color: var(--header-text-dark);
      border-color: var(--border-dark);
    }

    .theme-switch-wrapper {
      position: absolute;
      top: 1rem;
      right: 2rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: #fff;
    }

    body.dark-mode .theme-switch-wrapper {
      color: #e0e0e0;
    }

    .theme-switch {
      display: inline-block;
      height: 28px;
      position: relative;
      width: 50px;
    }

    .theme-switch input {
      display: none;
    }

    .slider {
      background-color: #D3D3D3; /* Lighter grey for the switch background in light mode */
      bottom: 0;
      cursor: pointer;
      left: 0;
      position: absolute;
      right: 0;
      top: 0;
      transition: .4s;
      border-radius: 34px;
    }

    .slider:before {
      background-color: #fff; /* Pure white for the slider circle */
      bottom: 4px;
      content: "";
      height: 20px;
      left: 4px;
      position: absolute;
      transition: .4s;
      width: 20px;
      border-radius: 50%;
    }

    input:checked + .slider {
      background-color: var(--primary-color); /* Orange when checked */
    }

    input:checked + .slider:before {
      transform: translateX(22px);
    }

    input:checked + .slider {
      background-color: var(--header-bg-dark); /* Dark background when checked (dark mode) */
    }

    @media (max-width: 900px) {
      .container { flex-direction: column; }
      nav { position: static; max-width: 100%; margin-bottom: 2em; }
      main { padding: 1.2rem 0.7rem; }
      .theme-switch-wrapper {
        position: static;
        margin-top: 1rem;
        justify-content: center;
      }
    }

    .main-content a {
      color: var(--link-color); /* Orange color for links */
      text-decoration: none;
    }

    .main-content .defined-in {
      font-size: 0.8em; /* Smaller font size for "Defined in" links */
      color: var(--link-color); /* Orange color for "Defined in" links */
    }

    .main-content h4 code {
      font-size: 0.9em;
    }

    /* Styles for the current navigation link */
    .nav-active {
        font-weight: bold;
        color: var(--nav-link-hover-light) !important;
    }
    body.dark-mode .nav-active {
        color: var(--nav-link-hover-dark) !important;
    }