:root {
      --primary-dark: #070a13;
      --secondary-dark: #0d111d;
      --accent-cyan: #00f0ff;
      --accent-cyan-hover: #00b0c0;
      --accent-cyan-glow: rgba(0, 240, 255, 0.15);
      --accent-purple: #a855f7;
      --text-main: #ffffff;
      --text-muted: #a0aec0;
      --border-color: rgba(255, 255, 255, 0.1);
      --glass-bg: rgba(13, 17, 29, 0.85);
      --glass-glow: 0 8px 32px 0 rgba(0, 240, 255, 0.05);
      --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* High Legibility / Contrast Mode Toggle Overrides */
    body.light-mode {
      --primary-dark: #f8fafc;
      --secondary-dark: #ffffff;
      --accent-cyan: #0891b2; /* readable dark cyan */
      --accent-cyan-hover: #0e7490;
      --accent-cyan-glow: rgba(8, 145, 178, 0.08);
      --accent-purple: #6d28d9;
      --text-main: #0f172a; /* slate 900 */
      --text-muted: #475569; /* slate 600 */
      --border-color: rgba(15, 23, 42, 0.12);
      --glass-bg: rgba(255, 255, 255, 0.95);
      --glass-glow: 0 4px 20px rgba(0, 0, 0, 0.05);
      background-image: none;
    }

    body {
      background: var(--primary-dark);
      background-image: radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.07) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(0, 240, 255, 0.03) 0%, transparent 40%);
      color: var(--text-main);
      font-family: 'Inter', sans-serif;
      margin: 0;
      padding: 0;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      transition: background 0.3s ease, color 0.3s ease;
    }

    /* Premium Header */
    header {
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: var(--border-color);
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 100;
      padding: 0.5rem 0;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    }

    body.light-mode header {
      background: rgba(255, 255, 255, 0.9);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .logo-container {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      transition: var(--transition);
    }

    .logo-container .light-logo {
      display: none !important;
    }
    .logo-container .dark-logo {
      display: block !important;
      height: 56px;
      width: auto;
      object-fit: contain;
    }

    body.light-mode .logo-container .dark-logo {
      display: none !important;
    }
    body.light-mode .logo-container .light-logo {
      display: block !important;
      height: 56px;
      width: auto;
      object-fit: contain;
      border-radius: 12px;
      border: 1px solid rgba(0, 0, 0, 0.1);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    }

    .logo-text {
      font-family: 'Outfit', sans-serif !important;
      font-size: 1.8rem !important;
      font-weight: 600 !important;
      letter-spacing: -0.5px !important;
      background: linear-gradient(135deg, var(--text-main) 0%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      transition: var(--transition);
    }

    body.light-mode .logo-text {
      font-family: 'Outfit', sans-serif !important;
      font-size: 1.8rem !important;
      font-weight: 600 !important;
      letter-spacing: -0.5px !important;
      background: none !important;
      -webkit-text-fill-color: var(--primary) !important;
      color: var(--primary) !important;
    }

    .clearance-badge {
      color: var(--accent-cyan);
      font-weight: 700;
      font-family: 'Outfit', sans-serif;
      font-size: 0.85rem;
      padding: 0.4rem 1rem;
      background: var(--accent-cyan-glow);
      border: 1px solid rgba(0, 240, 255, 0.2);
      border-radius: 20px;
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    body.light-mode .clearance-badge {
      border-color: var(--accent-cyan);
    }

    /* Accessibility Toggle button */
    .contrast-toggle {
      background: transparent;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 0.4rem 0.8rem;
      border-radius: 6px;
      cursor: pointer;
      font-size: 0.8rem;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
    }

    .contrast-toggle:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--accent-cyan);
    }

    body.light-mode .contrast-toggle:hover {
      background: rgba(0, 0, 0, 0.05);
    }

    /* Layout Hub */
    .hub-container {
      max-width: 1500px;
      margin: 100px auto 2rem;
      padding: 0 1.5rem;
      width: 100%;
      box-sizing: border-box;
      display: grid;
      grid-template-columns: 380px 1fr;
      gap: 2rem;
      flex: 1;
    }

    @media (max-width: 1100px) {
      .hub-container {
        grid-template-columns: 1fr;
        margin-top: 90px;
      }
    }

    /* Left Pane - Search & Tabs */
    .left-pane {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
      position: sticky;
      top: 95px;
      max-height: calc(100vh - 115px);
      overflow-y: auto;
      overscroll-behavior: contain;
      scrollbar-width: thin;
      scrollbar-color: rgba(0, 240, 255, 0.3) transparent;
      padding-right: 6px;
    }

    .left-pane::-webkit-scrollbar {
      width: 5px;
    }

    .left-pane::-webkit-scrollbar-track {
      background: transparent;
    }

    .left-pane::-webkit-scrollbar-thumb {
      background: rgba(0, 240, 255, 0.25);
      border-radius: 4px;
    }

    .left-pane::-webkit-scrollbar-thumb:hover {
      background: var(--accent-cyan);
    }

    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 1.8rem;
      box-shadow: var(--glass-glow);
      transition: var(--transition);
    }

    .glass-card:hover {
      border-color: rgba(0, 240, 255, 0.25);
    }

    /* Semantic AI search block */
    .ai-assistant-title {
      font-family: 'Outfit', sans-serif;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin: 0 0 0.8rem 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .search-input-group {
      display: flex;
      gap: 8px;
      background: rgba(11, 15, 25, 0.6);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 4px;
      transition: var(--transition);
    }

    body.light-mode .search-input-group {
      background: rgba(0, 0, 0, 0.03);
    }

    .search-input-group:focus-within {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }

    .search-input-group input {
      background: transparent;
      border: none;
      color: var(--text-main);
      padding: 0.8rem 0.5rem;
      flex: 1;
      font-family: inherit;
      font-size: 0.95rem;
      outline: none;
    }

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

    .search-input-group button {
      background: var(--accent-cyan);
      border: none;
      border-radius: 6px;
      color: #000;
      font-weight: 700;
      padding: 0 1.2rem;
      cursor: pointer;
      transition: var(--transition);
    }

    body.light-mode .search-input-group button {
      color: #fff;
    }

    .search-input-group button:hover {
      background: var(--accent-cyan-hover);
    }

    .ai-response-box {
      margin-top: 1rem;
      background: rgba(11, 15, 25, 0.4);
      border-radius: 8px;
      padding: 1.2rem;
      font-size: 0.95rem;
      line-height: 1.6;
      max-height: 250px;
      overflow-y: auto;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      display: none;
    }

    body.light-mode .ai-response-box {
      background: rgba(0, 0, 0, 0.02);
    }

    .ai-response-box.active {
      display: block;
    }

    .ai-response-box a {
      color: var(--accent-cyan);
      text-decoration: none;
      font-weight: 700;
    }

    .ai-response-box a:hover {
      text-decoration: underline;
    }

    /* Tabs list */
    .tab-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    button.tab-btn, a.tab-btn, .tab-btn {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 8px;
      color: #e2e8f0 !important;
      padding: 0.9rem 1.1rem;
      font-family: 'Outfit', sans-serif !important;
      font-size: 1rem !important;
      font-weight: 600 !important;
      text-align: left;
      cursor: pointer;
      transition: var(--transition);
      display: flex;
      align-items: center;
      justify-content: space-between;
      text-decoration: none !important;
      outline: none;
      box-sizing: border-box;
      width: 100%;
    }

    body.light-mode .tab-btn {
      background: rgba(0, 0, 0, 0.02);
      border-color: rgba(0, 0, 0, 0.08);
      color: #1e293b !important;
    }

    .tab-btn:hover {
      background: rgba(0, 240, 255, 0.06) !important;
      color: #00f0ff !important;
      border-color: rgba(0, 240, 255, 0.4) !important;
      text-decoration: none !important;
      transform: translateX(3px);
    }

    body.light-mode .tab-btn:hover {
      background: rgba(8, 145, 178, 0.06) !important;
      color: #0891b2 !important;
      border-color: #0891b2 !important;
    }

    .tab-btn.active {
      background: rgba(0, 240, 255, 0.12) !important;
      border-color: #00f0ff !important;
      color: #00f0ff !important;
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.15) !important;
      text-decoration: none !important;
    }

    body.light-mode .tab-btn.active {
      background: rgba(8, 145, 178, 0.1) !important;
      border-color: #0891b2 !important;
      color: #0891b2 !important;
    }

    .tab-btn span.tag {
      background: rgba(0, 240, 255, 0.08);
      color: #38bdf8;
      border: 1px solid rgba(0, 240, 255, 0.2);
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      transition: var(--transition);
      text-transform: uppercase;
      line-height: 1;
    }

    body.light-mode .tab-btn span.tag {
      background: rgba(8, 145, 178, 0.08);
      color: #0891b2;
      border-color: rgba(8, 145, 178, 0.2);
    }

    .tab-btn:hover span.tag {
      background: rgba(0, 240, 255, 0.2);
      color: #00f0ff;
      border-color: #00f0ff;
    }

    .tab-btn.active span.tag {
      background: #00f0ff !important;
      color: #070a13 !important;
      border-color: #00f0ff !important;
      font-weight: 800;
    }

    body.light-mode .tab-btn.active span.tag {
      background: #0891b2 !important;
      color: #ffffff !important;
    }

    /* Right Pane - Content View */
    .content-pane {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

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

    .pane-header h2 {
      margin: 0;
      font-family: 'Outfit', sans-serif;
      font-size: 1.6rem;
      color: var(--text-main);
    }

    /* Cornell Reading Column & Trees */
    .breadcrumb-trail {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 6px;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 1.2rem;
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-color);
      padding: 0.6rem 1rem;
      border-radius: 8px;
    }

    body.light-mode .breadcrumb-trail {
      background: rgba(0, 0, 0, 0.02);
    }

    .breadcrumb-item {
      cursor: pointer;
      color: var(--accent-cyan);
      font-weight: 600;
    }

    .breadcrumb-item:hover {
      text-decoration: underline;
    }

    .breadcrumb-separator {
      color: var(--text-muted);
      opacity: 0.5;
    }

    .breadcrumb-current {
      color: var(--text-main);
      font-weight: 700;
    }

    /* Directory Lists */
    .lii-table {
      width: 100%;
      border-collapse: collapse;
      background: rgba(17, 24, 39, 0.4);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      margin-bottom: 2rem;
    }

    body.light-mode .lii-table {
      background: rgba(255, 255, 255, 0.5);
    }

    .lii-table th {
      background: rgba(255, 255, 255, 0.03);
      color: var(--text-muted);
      font-family: 'Outfit', sans-serif;
      font-weight: 700;
      text-align: left;
      padding: 1rem 1.2rem;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.9rem;
    }

    body.light-mode .lii-table th {
      background: rgba(0, 0, 0, 0.02);
    }

    .lii-table td {
      padding: 1.1rem 1.2rem;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 0.98rem;
    }

    .lii-table tbody tr {
      transition: var(--transition);
      cursor: pointer;
    }

    .lii-table tbody tr:hover {
      background: rgba(255, 255, 255, 0.03);
    }

    body.light-mode .lii-table tbody tr:hover {
      background: rgba(0, 0, 0, 0.02);
    }

    .lii-cite {
      font-family: monospace;
      color: var(--accent-cyan);
      font-weight: 800;
      font-size: 1rem;
    }

    /* Legal Reader View */
    .lii-reader {
      background: rgba(17, 24, 39, 0.3);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      padding: 2.5rem;
    }

    body.light-mode .lii-reader {
      background: transparent;
      border: none;
      padding: 1rem 0;
    }

    .lii-reader h2 {
      font-family: 'Outfit', sans-serif;
      color: var(--text-main);
      font-size: 1.6rem;
      margin-top: 0;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 0.8rem;
    }

    .lii-statute-text {
      font-family: 'Lora', serif;
      font-size: 1.25rem; /* Increased size for superior readability */
      line-height: 1.8;
      color: var(--text-main); /* High contrast */
      max-width: 850px;
      margin: 1.5rem auto;
    }

    .lii-statute-text strong {
      color: var(--text-main);
    }

    .lii-toolbox {
      display: flex;
      gap: 12px;
      margin-top: 2rem;
      border-top: 1px solid var(--border-color);
      padding-top: 1.5rem;
    }

    .tool-btn {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 0.6rem 1.2rem;
      border-radius: 6px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      transition: var(--transition);
    }

    body.light-mode .tool-btn {
      background: rgba(0, 0, 0, 0.02);
    }

    .tool-btn:hover {
      background: var(--accent-cyan);
      color: #000;
      border-color: var(--accent-cyan);
    }

    body.light-mode .tool-btn:hover {
      color: #fff;
    }

    /* State Picker Grid */
    .state-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
      gap: 8px;
      margin-bottom: 2rem;
    }

    .state-btn {
      background: rgba(255,255,255,0.02);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      padding: 0.6rem 0;
      border-radius: 6px;
      font-weight: 700;
      text-align: center;
      cursor: pointer;
      transition: var(--transition);
    }

    body.light-mode .state-btn {
      background: rgba(0, 0, 0, 0.02);
    }

    .state-btn:hover, .state-btn.active {
      background: var(--accent-cyan);
      color: #000;
      border-color: var(--accent-cyan);
    }

    body.light-mode .state-btn:hover, body.light-mode .state-btn.active {
      color: #fff;
    }

    /* Dict filters */
    .alphabet-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 1.5rem;
      background: rgba(0,0,0,0.2);
      padding: 0.5rem;
      border-radius: 8px;
    }

    body.light-mode .alphabet-bar {
      background: rgba(0, 0, 0, 0.03);
    }

    .letter-btn {
      width: 28px;
      height: 28px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      border: none;
      color: var(--text-muted);
      border-radius: 4px;
      cursor: pointer;
      font-weight: 700;
      font-size: 0.85rem;
      transition: var(--transition);
    }

    .letter-btn:hover, .letter-btn.active {
      background: var(--accent-cyan);
      color: #000;
    }

    body.light-mode .letter-btn:hover, body.light-mode .letter-btn.active {
      color: #fff;
    }

    /* Custom Etymology Card */
    .etym-card {
      background: rgba(168, 85, 247, 0.08);
      border: 1px dashed var(--accent-purple);
      border-radius: 12px;
      padding: 1.5rem;
      margin-bottom: 1.5rem;
      display: flex;
      gap: 1rem;
      align-items: flex-start;
    }

    .etym-title {
      font-family: 'Outfit', sans-serif;
      font-weight: 700;
      color: var(--accent-purple);
      margin: 0 0 0.5rem 0;
      font-size: 1.1rem;
    }

    /* Generic document item override */
    .document-item {
      background: rgba(17, 24, 39, 0.4);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 1.25rem 1.75rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1.5rem;
      transition: var(--transition);
      margin-bottom: 1rem;
    }

    body.light-mode .document-item {
      background: rgba(255, 255, 255, 0.8);
    }

    .document-item:hover {
      border-color: var(--accent-cyan);
      background: rgba(17, 24, 39, 0.6);
    }

    body.light-mode .document-item:hover {
      background: rgba(255, 255, 255, 1);
    }

    .doc-info {
      flex: 1;
      min-width: 0;
    }

    .doc-info h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin: 0 0 0.3rem 0;
    }

    .doc-info p {
      color: var(--text-muted);
      font-size: 0.85rem;
      margin: 0;
    }

    .doc-meta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      flex-shrink: 0;
      white-space: nowrap;
    }

    .tag {
      background: rgba(255,255,255,0.05);
      color: var(--text-muted);
      padding: 0.35rem 0.85rem;
      border-radius: 50px;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      white-space: nowrap;
      display: inline-block;
    }

    body.light-mode .tag {
      background: rgba(0, 0, 0, 0.05);
    }

    .download-btn {
      background: var(--accent-cyan);
      color: #000 !important;
      padding: 0.5rem 1.1rem;
      border-radius: 6px;
      text-decoration: none;
      font-weight: 700;
      font-size: 0.85rem;
      white-space: nowrap;
      display: inline-block;
      transition: var(--transition);
    }

    body.light-mode .download-btn {
      color: #fff !important;
    }

    .download-btn:hover {
      background: var(--accent-cyan-hover);
    }

    /* Loader */
    .loading-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 4rem 2rem;
      text-align: center;
    }

    .spinner {
      width: 40px;
      height: 40px;
      border: 3px solid rgba(255, 255, 255, 0.05);
      border-radius: 50%;
      border-top-color: var(--accent-cyan);
      animation: spin 1s ease-in-out infinite;
      margin-bottom: 1rem;
    }

      @keyframes spin {
        to { transform: rotate(360deg); }
      }

      /* Glossary terms hover tooltips */
      .glossary-term {
        border-bottom: 1.5px dotted var(--accent-cyan);
        position: relative;
        cursor: help;
        color: inherit;
      }
      .glossary-term:hover {
        color: var(--accent-cyan);
      }
      .glossary-term::after {
        content: attr(data-tooltip);
        position: absolute;
        bottom: 125%;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(13, 17, 29, 0.95);
        border: 1px solid var(--accent-cyan);
        color: white;
        padding: 8px 12px;
        border-radius: 6px;
        font-size: 0.85rem;
        font-family: 'Inter', sans-serif;
        line-height: 1.4;
        width: 250px;
        white-space: normal;
        display: none;
        z-index: 1000;
        box-shadow: 0 4px 15px rgba(0,0,0,0.5);
        pointer-events: none;
      }
      .glossary-term:hover::after {
        display: block;
      }

      /* Universal High-Legibility Hyperlinks (No dark unreadable blues) */
      a, .rule-content-body a, .cornell-rule-reader a, .admiralty-rule-container a, .lii-reader a, .lii-reader-body a, .statute-body a {
        color: #00f0ff !important;
        text-decoration: underline !important;
        text-underline-offset: 3px;
        font-weight: 500;
        transition: color 0.15s ease;
      }

      a:hover, .rule-content-body a:hover, .cornell-rule-reader a:hover, .admiralty-rule-container a:hover, .lii-reader a:hover {
        color: #67e8f9 !important;
        text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
      }

      body.light-mode a, body.light-mode .rule-content-body a, body.light-mode .cornell-rule-reader a, body.light-mode .lii-reader a {
        color: #0369a1 !important;
      }

      /* Step Back Navigation Bar */
      .step-back-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: rgba(0, 0, 0, 0.25);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 0.6rem 1rem;
        margin-bottom: 1.5rem;
        gap: 0.75rem;
        flex-wrap: wrap;
      }

      .step-back-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(0, 240, 255, 0.1);
        color: #00f0ff !important;
        border: 1px solid rgba(0, 240, 255, 0.3);
        padding: 0.45rem 0.9rem;
        border-radius: 6px;
        font-size: 0.88rem;
        font-weight: 600;
        cursor: pointer;
        text-decoration: none !important;
        transition: all 0.2s ease;
      }

      .step-back-btn:hover {
        background: rgba(0, 240, 255, 0.2);
        border-color: #00f0ff;
        box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
      }