:root {
      --base-font-size: 15px;
      --theme-color: #7c5cfc;
      --sidebar-width: 260px;
      --sidebar-nav-link-color--active: #7c5cfc;
      --sidebar-nav-link-border-color--active: #7c5cfc;
      --code-theme-background: #f6f8fa;
      --code-inline-background: #f0f0f0;
    }
    /* Dark mode — full docsify-themeable variable override */
    [data-theme="dark"] {
      /* Base */
      --base-background-color: #1a1a2e;
      --base-color: #d4d4d8;
      --theme-color: #9d84fc;

      /* Headings */
      --heading-color: #e8e8ec;
      --heading-h1-color: #f0f0f4;
      --heading-h1-border-color: #9d84fc;
      --heading-h2-color: #e0e0e8;
      --heading-h2-border-color: #333355;

      /* Links */
      --link-color: #a78bfa;
      --link-color--hover: #c4b5fd;

      /* Sidebar */
      --sidebar-background: #141428;
      --sidebar-border-color: #2a2a4a;
      --sidebar-name-color: #e0e0e8;
      --sidebar-nav-link-color: #a0a0b8;
      --sidebar-nav-link-color--active: #9d84fc;
      --sidebar-nav-link-color--hover: #c4b5fd;
      --sidebar-nav-link-background--active: rgba(157, 132, 252, 0.08);
      --sidebar-nav-link-background--hover: rgba(157, 132, 252, 0.05);
      --sidebar-nav-link-border-color--active: #9d84fc;
      --sidebar-nav-strong-color: #c0c0d0;
      --sidebar-toggle-icon-color: #a0a0b8;
      --sidebar-toggle-background: #141428;

      /* Code */
      --code-theme-background: #12122a;
      --code-theme-text: #d4d4d8;
      --code-theme-keyword: #c792ea;
      --code-theme-function: #82aaff;
      --code-theme-variable: #f78c6c;
      --code-theme-operator: #89ddff;
      --code-theme-comment: #676e95;
      --code-theme-punctuation: #89ddff;
      --code-theme-selector: #c3e88d;
      --code-theme-tag: #f07178;
      --code-theme-selection: rgba(113, 124, 180, 0.2);
      --code-inline-background: #262640;
      --code-inline-color: #c792ea;

      /* Blockquote */
      --blockquote-background: rgba(157, 132, 252, 0.05);
      --blockquote-border-color: #9d84fc;
      --blockquote-color: #a0a0b8;

      /* Table */
      --table-head-background: #1e1e38;
      --table-head-border-color: #333355;
      --table-body-border-color: #2a2a4a;
      --table-cell-border-color: #2a2a4a;
      --table-row-even-background: #1a1a32;
      --table-row-odd-background: transparent;

      /* Search */
      --search-background: #141428;
      --search-input-background-color: #1e1e38;
      --search-input-background-color--focus: #262640;
      --search-input-border-color: #333355;
      --search-input-color: #d4d4d8;
      --search-input-placeholder-color: #666680;
      --search-result-heading-color: #e0e0e8;
      --search-result-item-color: #a0a0b8;
      --search-result-item-border-color: #2a2a4a;
      --search-result-keyword-background: rgba(157, 132, 252, 0.2);
      --search-result-keyword-color: #c4b5fd;

      /* Notice / tip boxes */
      --notice-background: rgba(157, 132, 252, 0.06);
      --notice-border-color: #9d84fc;
      --notice-color: #c0c0d0;
      --notice-tip-background: rgba(157, 132, 252, 0.06);
      --notice-tip-border-color: #9d84fc;
      --notice-tip-color: #c0c0d0;
      --notice-important-background: rgba(255, 100, 100, 0.06);
      --notice-important-border-color: #ff6b6b;
      --notice-important-color: #ffaaaa;

      /* Copy code button */
      --copycode-background: #333355;
      --copycode-color: #a0a0b8;

      /* HR */
      --hr-border: 1px solid #2a2a4a;
    }
    /* Dark mode — elements not covered by CSS variables */
    [data-theme="dark"] .markdown-section h1 { border-bottom-color: #9d84fc; }
    [data-theme="dark"] .markdown-section img { opacity: 0.9; }
    [data-theme="dark"] .docsify-pagination-container { border-top-color: #2a2a4a; }
    [data-theme="dark"] .pagination-item-label { color: #666680; }
    [data-theme="dark"] .pagination-item-title { color: #a78bfa; }
    [data-theme="dark"] .lang-switch-btn { background: #1e1e38; border-color: #9d84fc; color: #9d84fc; }
    [data-theme="dark"] .lang-switch-btn:hover { background: #9d84fc; color: #fff; }
    [data-theme="dark"] .dark-toggle-btn { background: #1e1e38; border-color: #9d84fc; color: #9d84fc; }
    [data-theme="dark"] .dark-toggle-btn:hover { background: #9d84fc; color: #fff; }
    [data-theme="dark"] .back-to-top { background: #1e1e38; border-color: #9d84fc; color: #9d84fc; box-shadow: 0 2px 8px rgba(0,0,0,0.3); }
    [data-theme="dark"] .back-to-top:hover { background: #9d84fc; color: #fff; }

    .markdown-section h1 { border-bottom: 2px solid #7c5cfc; padding-bottom: 0.3em; }
    .markdown-section table { display: table; width: 100%; }
    .cover-main { max-width: 600px; }
    .cover-main blockquote { font-size: 1em; color: #666; }

    /* Reading progress bar */
    .reading-progress {
      position: fixed;
      top: 0;
      left: 0;
      width: 0%;
      height: 3px;
      background: linear-gradient(90deg, #7c5cfc, #a78bfa);
      z-index: 10000;
      transition: width 0.1s linear;
    }
    [data-theme="dark"] .reading-progress {
      background: linear-gradient(90deg, #9d84fc, #c4b5fd);
    }

    /* Top-right button group */
    .top-btn-group {
      position: fixed;
      top: 12px;
      right: 100px;
      z-index: 999;
      display: flex;
      gap: 8px;
      align-items: center;
    }

    /* Language switcher button */
    .lang-switch-btn {
      padding: 6px 16px;
      border: 1.5px solid #7c5cfc;
      border-radius: 20px;
      background: #fff;
      color: #7c5cfc;
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.25s ease;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .lang-switch-btn:hover {
      background: #7c5cfc;
      color: #fff;
      transform: translateY(-1px);
      box-shadow: 0 3px 12px rgba(124, 92, 252, 0.3);
    }
    .lang-switch-btn:active {
      transform: translateY(0);
      box-shadow: 0 1px 4px rgba(124, 92, 252, 0.2);
    }
    .lang-switch-btn::before {
      content: '\1F310';
      font-size: 14px;
    }

    /* Dark mode toggle button */
    .dark-toggle-btn {
      width: 34px;
      height: 34px;
      border: 1.5px solid #7c5cfc;
      border-radius: 50%;
      background: #fff;
      color: #7c5cfc;
      font-size: 16px;
      cursor: pointer;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0;
      line-height: 1;
    }
    .dark-toggle-btn:hover {
      background: #7c5cfc;
      color: #fff;
      transform: translateY(-1px);
      box-shadow: 0 3px 12px rgba(124, 92, 252, 0.3);
    }
    .dark-toggle-btn:active {
      transform: translateY(0);
    }

    /* Back to top button */
    .back-to-top {
      position: fixed;
      bottom: 30px;
      right: 24px;
      width: 40px;
      height: 40px;
      border: 1.5px solid #7c5cfc;
      border-radius: 50%;
      background: #fff;
      color: #7c5cfc;
      font-size: 18px;
      cursor: pointer;
      z-index: 999;
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    .back-to-top.visible {
      opacity: 1;
      visibility: visible;
    }
    .back-to-top:hover {
      background: #7c5cfc;
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 4px 16px rgba(124, 92, 252, 0.3);
    }