:root {
      --primary: #2563EB;
      --primary-hover: #1D4ED8;
      --accent: #0284C7;
      --bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text: #0F172A;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --border-focus: #93C5FD;
      --success: #10B981;
      --warning: #F59E0B;
      --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
      --radius: 12px;
      --radius-sm: 8px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

    header {
      background: rgba(255, 255, 255, 0.95);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(8px);
    }
    .nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--text);
    }
    .brand-logo {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, #2563EB, #0284C7);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 800;
      font-size: 20px;
      box-shadow: 0 4px 10px rgba(37,99,235,0.25);
    }
    .brand-title {
      font-size: 18px;
      font-weight: 800;
      letter-spacing: -0.02em;
    }
    .brand-badge {
      background: #EFF6FF;
      color: var(--primary);
      font-size: 11px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 20px;
      border: 1px solid #DBEAFE;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .balance-box {
      display: flex;
      align-items: center;
      gap: 8px;
      background: #F1F5F9;
      padding: 6px 14px;
      border-radius: 30px;
      border: 1px solid var(--border);
      font-size: 13px;
      font-weight: 600;
    }
    .balance-val { color: var(--success); font-weight: 700; }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s ease;
      border: none;
      text-decoration: none;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      box-shadow: 0 2px 6px rgba(37,99,235,0.2);
    }
    .btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--border);
      color: var(--text);
    }
    .btn-outline:hover { background: #F1F5F9; }
    .btn-success { background: var(--success); color: white; }
    .btn-success:hover { background: #059669; }
    .btn-sm { padding: 6px 12px; font-size: 12px; }
    .btn-lg { padding: 12px 24px; font-size: 15px; border-radius: var(--radius); }

        /* Modern Segmented Navigation & Card Suite */
    .tool-tabs {
      display: flex;
      gap: 6px;
      margin: 28px 0 20px;
      padding: 6px;
      background: #F1F5F9;
      border: 1px solid var(--border);
      border-radius: 14px;
      overflow-x: auto;
    }
    .tool-tabs::-webkit-scrollbar { display: none; }

    .tool-tab-btn {
      flex: 1 1 0;
      padding: 10px 14px;
      font-size: 13.5px;
      font-weight: 700;
      cursor: pointer;
      border-radius: 10px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      white-space: nowrap;
      transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
      border: none;
      background: transparent;
      color: var(--text-muted);
    }
    .tool-tab-btn:hover {
      color: var(--text);
      background: rgba(255, 255, 255, 0.6);
    }

    .tool-tab-btn.active {
      background: #FFFFFF !important;
      color: var(--primary) !important;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.07), 0 1px 2px rgba(0, 0, 0, 0.04);
      font-weight: 800;
    }

    /* Clean Elevated Card */
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 28px 30px;
      box-shadow: 0 4px 15px -2px rgba(0, 0, 0, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
      margin-bottom: 24px;
      position: relative;
      transition: all 0.25s ease;
    }

    #viewPRD .card { border-top: 3px solid #3B82F6; }
    #viewCopywriter .card { border-top: 3px solid #F43F5E; }
    #viewLegalDoc .card { border-top: 3px solid #8B5CF6; }
    #viewPDF .card { border-top: 3px solid #D97706; }
    #viewImageStudio .card { border-top: 3px solid #059669; }

    .card-header {
      margin-bottom: 24px;
      border-bottom: 1.5px solid rgba(226, 232, 240, 0.7);
      padding-bottom: 16px;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 6px;
    }
    .card-title-row {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      width: 100%;
    }
    .card-title {
      font-size: 19px;
      font-weight: 800;
      color: var(--text);
      letter-spacing: -0.01em;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .card-subtitle {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .form-group { margin-bottom: 18px; }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-family: inherit;
      font-size: 14px;
      background: #F8FAFC;
      transition: border-color 0.2s, background 0.2s;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
    }
    textarea.form-control { min-height: 110px; resize: vertical; }

    .tier-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 16px;
      margin-top: 10px;
    }
    .tier-card {
      border: 2px solid var(--border);
      border-radius: var(--radius);
      padding: 18px;
      cursor: pointer;
      transition: all 0.2s;
      position: relative;
    }
    .tier-card:hover { border-color: #93C5FD; }
    .tier-card.active {
      border-color: var(--primary);
      background: #EFF6FF;
    }
    .tier-name { font-weight: 700; font-size: 15px; margin-bottom: 4px; }
    .tier-price { font-size: 18px; font-weight: 800; color: var(--primary); margin-bottom: 6px; }
    .tier-desc { font-size: 12px; color: var(--text-muted); }

    .result-container {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      margin-top: 24px;
      display: none;
    }
    .result-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border);
    }
    .markdown-body {
      font-size: 14px;
      line-height: 1.7;
      color: #334155;
      overflow-x: auto;
    }
    .markdown-body h1, .markdown-body h2, .markdown-body h3 {
      color: var(--text);
      margin: 20px 0 10px;
      font-weight: 700;
    }
    .markdown-body pre {
      background: #0F172A;
      color: #F8FAFC;
      padding: 14px;
      border-radius: var(--radius-sm);
      overflow-x: auto;
      font-family: 'JetBrains Mono', monospace;
      font-size: 13px;
      margin: 12px 0;
    }
    .markdown-body code {
      font-family: 'JetBrains Mono', monospace;
      background: #F1F5F9;
      padding: 2px 6px;
      border-radius: 4px;
      font-size: 12px;
      color: #0F172A;
    }
    .markdown-body pre code { background: transparent; color: inherit; padding: 0; }
    .markdown-body ul, .markdown-body ol { margin-left: 20px; margin-bottom: 12px; }
    .markdown-body table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 13px; }
    .markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
    .markdown-body th { background: #F8FAFC; font-weight: 600; }

    .modal-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(15, 23, 42, 0.6);
      backdrop-filter: blur(4px);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 100;
      padding: 20px;
    }
    .modal {
      background: var(--card-bg);
      border-radius: var(--radius);
      width: 100%;
      max-width: 440px;
      padding: 28px;
      box-shadow: var(--shadow-lg);
    }
    .modal-title { font-size: 18px; font-weight: 800; margin-bottom: 12px; display: flex; align-items: center; justify-content: space-between; }
    .modal-close { cursor: pointer; font-size: 20px; color: var(--text-muted); }

    #qrcodeContainer {
      display: flex;
      justify-content: center;
      margin: 16px 0;
      padding: 12px;
      background: white;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
    }

    .toast {
      position: fixed;
      bottom: 24px;
      right: 24px;
      padding: 12px 20px;
      background: #0F172A;
      color: white;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 600;
      box-shadow: var(--shadow-lg);
      display: none;
      z-index: 200;
      animation: fadeIn 0.2s ease;
    }

    footer {
      border-top: 1px solid var(--border);
      padding: 32px 0;
      margin-top: 60px;
      text-align: center;
      color: var(--text-muted);
      font-size: 13px;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }
  
    .badge-detail {
      background: #FEF3C7;
      color: #92400E;
      border: 1px solid #FCD34D;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 20px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: all 0.2s;
      box-shadow: 0 1px 2px rgba(245, 158, 11, 0.15);
    }
    .badge-detail:hover {
      background: #FDE68A;
      color: #78350F;
      transform: translateY(-1px);
      box-shadow: 0 2px 5px rgba(245, 158, 11, 0.25);
    }

    /* Print & Export PDF Styling */
    @media print {
      header, .tool-tabs, .card, footer, .toast, .modal-backdrop, .nav-actions, .result-header button, #downloadBtn {
        display: none !important;
      }
      body, main, .container {
        background: #FFFFFF !important;
        padding: 0 !important;
        margin: 0 !important;
        max-width: 100% !important;
        color: #000000 !important;
      }
      .result-container {
        display: block !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
      }
      .result-header {
        border-bottom: 2px solid #000000 !important;
        margin-bottom: 20px !important;
        padding-bottom: 10px !important;
      }
      .result-header div h2 {
        font-size: 20pt !important;
        color: #000000 !important;
      }
      .markdown-body {
        font-size: 11pt !important;
        line-height: 1.6 !important;
        color: #111111 !important;
      }
      .markdown-body h1 { font-size: 16pt !important; page-break-after: avoid; }
      .markdown-body h2 { font-size: 14pt !important; page-break-after: avoid; }
      .markdown-body h3 { font-size: 12pt !important; page-break-after: avoid; }
      .markdown-body table {
        width: 100% !important;
        border-collapse: collapse !important;
        page-break-inside: avoid;
      }
      .markdown-body th, .markdown-body td {
        border: 1px solid #444444 !important;
        padding: 6px 10px !important;
      }
      .markdown-body pre {
        background: #F1F5F9 !important;
        color: #000000 !important;
        border: 1px solid #CCCCCC !important;
        page-break-inside: avoid;
      }
    }

    /* Mobile Drawer & Clean Mobile Navbar */
    .mobile-drawer-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(15, 23, 42, 0.5);
      backdrop-filter: blur(4px);
      z-index: 150;
      display: none;
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .mobile-drawer-backdrop.active {
      display: block;
      opacity: 1;
    }

    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -320px;
      width: 300px;
      height: 100%;
      background: #FFFFFF;
      box-shadow: -4px 0 25px rgba(0,0,0,0.15);
      z-index: 160;
      transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      padding: 24px 20px;
      box-sizing: border-box;
    }
    .mobile-drawer.active {
      right: 0;
    }

    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 20px;
    }
    .drawer-title {
      font-size: 16px;
      font-weight: 800;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .drawer-close {
      cursor: pointer;
      font-size: 22px;
      color: var(--text-muted);
      width: 32px;
      height: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      background: #F1F5F9;
    }

    .drawer-user-card {
      background: #F8FAFC;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 16px;
      margin-bottom: 18px;
    }

    .drawer-menu-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      color: var(--text);
      font-weight: 600;
      font-size: 14px;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.2s;
      margin-bottom: 6px;
      border: 1px solid transparent;
    }
    .drawer-menu-item:hover {
      background: #F1F5F9;
    }
    .drawer-menu-item.active {
      background: #EFF6FF;
      color: var(--primary);
      border-color: #DBEAFE;
    }

    


    /* Mobile Responsive Fixes for Cards, Forms, and Tab 4 Notice Banner */
    


    /* =======================================================
       COMPREHENSIVE MOBILE VIEW REDESIGN (SMARTPHONE COMPATIBLE)
       ======================================================= */
    @media (max-width: 768px) {
      /* Body & Main Container */
      body {
        font-size: 13.5px;
      }
      .container {
        padding: 0 12px !important;
        max-width: 100% !important;
      }

      /* Navbar Cleanliness */
      .nav {
        height: 56px !important;
      }
      .nav-actions .balance-box,
      .nav-actions #dashNavBtn,
      .nav-actions #logoutNavBtn {
        display: none !important;
      }
      .brand-title {
        font-size: 15px !important;
      }
      .brand-logo {
        width: 30px !important;
        height: 30px !important;
        font-size: 15px !important;
      }
      #authBtn {
        padding: 6px 12px !important;
        font-size: 12px !important;
      }

      /* Mobile Horizontal Scrollable Tab Bar */
      .tool-tabs {
        margin: 16px 0 0 !important;
        padding: 4px 2px 0 !important;
        gap: 6px !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        scroll-snap-type: x mandatory !important;
      }
      .tool-tab-btn {
        padding: 9px 13px !important;
        font-size: 12px !important;
        border-radius: 10px 10px 0 0 !important;
        gap: 6px !important;
        scroll-snap-align: start !important;
        flex-shrink: 0 !important;
      }

      /* Card Styling - 100% Responsive & Seamless */
      .card {
        padding: 18px 14px !important;
        border-radius: 0 14px 14px 14px !important;
        margin-bottom: 16px !important;
        width: 100% !important;
        box-sizing: border-box !important;
        box-shadow: 0 4px 15px rgba(0,0,0,0.03) !important;
      }
      .card-header {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 6px !important;
        margin-bottom: 16px !important;
        padding-bottom: 12px !important;
      }
      .card-title {
        font-size: 15.5px !important;
        line-height: 1.35 !important;
        display: flex !important;
        align-items: center !important;
        flex-wrap: wrap !important;
        gap: 8px !important;
      }

      /* Form Elements Mobile Ergonomics */
      .form-group {
        margin-bottom: 14px !important;
      }
      .form-label {
        font-size: 12.5px !important;
        margin-bottom: 4px !important;
      }
      .form-control {
        font-size: 16px !important; /* Prevents auto-zoom on iOS Safari */
        padding: 10px 12px !important;
        border-radius: 8px !important;
        box-sizing: border-box !important;
        width: 100% !important;
      }
      textarea.form-control {
        min-height: 95px !important;
        font-size: 15px !important;
      }
      .form-hint {
        font-size: 11px !important;
        line-height: 1.4 !important;
      }

      /* Multi-Column Form Grids Stack to Single Column on Mobile */
      div[style*="grid-template-columns:1fr 1fr"],
      div[style*="grid-template-columns: 1fr 1fr"],
      div[style*="grid-template-columns: repeat(auto-fit, minmax(260px, 1fr))"] {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
      }

      /* Tier Cards in PRD */
      .tier-grid {
        grid-template-columns: 1fr !important;
        gap: 10px !important;
      }
      .tier-card {
        padding: 14px !important;
      }

      /* Action Buttons */
      .btn-lg {
        width: 100% !important;
        padding: 12px 16px !important;
        font-size: 14px !important;
        border-radius: 10px !important;
        margin-top: 8px !important;
      }

      /* Tab 4 Warning Banner */
      #pdfTopupNotice {
        padding: 12px !important;
        margin-bottom: 14px !important;
        width: 100% !important;
        box-sizing: border-box !important;
      }
      #pdfTopupNotice button {
        width: 100% !important;
        font-size: 12px !important;
        padding: 9px !important;
      }

      /* Result Box & Output */
      .result-container {
        padding: 16px 12px !important;
        border-radius: 12px !important;
      }
      .result-header {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 12px !important;
      }
      .result-header > div:last-child {
        width: 100% !important;
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 6px !important;
      }
      .result-header button {
        flex: 1 1 calc(50% - 6px) !important;
        padding: 8px 10px !important;
        font-size: 11.5px !important;
        text-align: center !important;
        justify-content: center !important;
      }
      .result-header #downloadBtn {
        flex: 1 1 100% !important;
      }

      /* Markdown Body on Mobile */
      .markdown-body {
        font-size: 13px !important;
        line-height: 1.6 !important;
      }
      .markdown-body table {
        display: block !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
      }

      /* Modals on Mobile */
      .modal {
        padding: 20px 16px !important;
        width: 95% !important;
        max-width: 95% !important;
        margin: 10px !important;
      }
    }


    /* PUNA UI/UX STANDARD — Reusable Modal, Confirm & Toast System */
    .modal-card-scrollable {
      padding: 0 !important;
      overflow: hidden !important;
      display: flex !important;
      flex-direction: column !important;
      max-height: 90vh !important;
      border-radius: 18px !important;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25) !important;
      border: 1px solid var(--border) !important;
    }

    .modal-header-sticky {
      display: flex !important;
      align-items: center !important;
      justify-content: space-between !important;
      padding: 14px 18px !important;
      background: #FFFFFF !important;
      border-bottom: 1px solid var(--border) !important;
      position: sticky !important;
      top: 0 !important;
      z-index: 20 !important;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05) !important;
      flex-shrink: 0 !important;
    }

    .modal-body-scrollable {
      padding: 20px 20px 24px !important;
      overflow-y: auto !important;
      flex-grow: 1 !important;
      -webkit-overflow-scrolling: touch !important;
    }

    .btn-close-puna {
      padding: 6px 14px !important;
      font-size: 12px !important;
      font-weight: 700 !important;
      background: #FEE2E2 !important;
      color: #B91C1C !important;
      border: 1px solid #FECACA !important;
      border-radius: 8px !important;
      cursor: pointer !important;
      display: inline-flex !important;
      align-items: center !important;
      gap: 4px !important;
      transition: all 0.2s ease !important;
    }
    .btn-close-puna:hover {
      background: #FCA5A5 !important;
      color: #7F1D1D !important;
    }

    @keyframes modalPopIn {
      0% { transform: scale(0.92); opacity: 0; }
      100% { transform: scale(1); opacity: 1; }
    }

    /* Puna Center Screen Gradient Toasts */
    #toastContainer {
      position: fixed;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      z-index: 999999;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 12px;
      pointer-events: none;
      max-width: 380px;
      width: 90%;
    }

    .custom-toast {
      padding: 16px 20px;
      border-radius: 16px;
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.28);
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 13.5px;
      font-weight: 700;
      text-align: left;
      pointer-events: auto;
      animation: modalPopIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      transition: all 0.25s ease;
      width: 100%;
      box-sizing: border-box;
      color: #FFFFFF;
      backdrop-filter: blur(8px);
    }
    .custom-toast.toast-success {
      background: linear-gradient(135deg, #10B981, #059669);
      border: 1px solid rgba(255, 255, 255, 0.25);
      box-shadow: 0 15px 35px rgba(16, 185, 129, 0.35);
    }
    .custom-toast.toast-error {
      background: linear-gradient(135deg, #EF4444, #DC2626);
      border: 1px solid rgba(255, 255, 255, 0.25);
      box-shadow: 0 15px 35px rgba(239, 68, 68, 0.35);
    }
    .custom-toast.toast-info {
      background: linear-gradient(135deg, #0284C7, #0369A1);
      border: 1px solid rgba(255, 255, 255, 0.25);
      box-shadow: 0 15px 35px rgba(2, 132, 199, 0.35);
    }
    .custom-toast.toast-warning {
      background: linear-gradient(135deg, #F59E0B, #D97706);
      border: 1px solid rgba(255, 255, 255, 0.25);
      box-shadow: 0 15px 35px rgba(245, 158, 11, 0.35);
    }


    .star-item {
      color: #CBD5E1;
      transition: color 0.15s ease, transform 0.15s ease;
      display: inline-block;
    }
    .star-item:hover {
      transform: scale(1.18);
    }
    .star-item.active {
      color: #F59E0B;
      text-shadow: 0 2px 8px rgba(245, 158, 11, 0.4);
    }


    @media (max-width: 768px) {
      #dashFilterGrid {
        grid-template-columns: 1fr !important;
        gap: 6px !important;
      }
    }


    /* OTP 4 Digit Inputs Styling */
    .otp-digit-input {
      width: 52px !important;
      height: 58px !important;
      font-size: 24px !important;
      font-weight: 800 !important;
      text-align: center !important;
      padding: 0 !important;
      border-radius: 12px !important;
      border: 2px solid var(--border) !important;
      background: #F8FAFC !important;
      color: var(--primary) !important;
      transition: all 0.2s ease !important;
    }
    .otp-digit-input:focus {
      border-color: var(--primary) !important;
      background: #FFFFFF !important;
      box-shadow: 0 0 0 4px rgba(37,99,235,0.15) !important;
      transform: translateY(-2px);
    }


    /* Diff Viewer Styling */
    .diff-line {
      display: flex;
      padding: 2px 8px;
      white-space: pre-wrap;
      word-break: break-word;
      border-bottom: 1px solid rgba(241, 245, 249, 0.8);
    }
    .diff-line.added {
      background: #ECFDF5;
      color: #065F46;
      border-left: 3px solid #10B981;
    }
    .diff-line.removed {
      background: #FEF2F2;
      color: #991B1B;
      border-left: 3px solid #EF4444;
    }
    .diff-line.unchanged {
      background: #FFFFFF;
      color: #334155;
    }
    .diff-line-num {
      width: 38px;
      color: #94A3B8;
      user-select: none;
      text-align: right;
      padding-right: 12px;
      flex-shrink: 0;
    }
    .diff-split-col {
      flex: 1;
      overflow-x: auto;
      border-right: 1px solid var(--border);
      padding: 0;
    }
    .diff-split-col:last-child {
      border-right: none;
    }

    @media (max-width: 768px) {
      #diffSelectorGrid {
        grid-template-columns: 1fr !important;
        gap: 8px !important;
      }
      .diff-split-view {
        flex-direction: column !important;
      }
      .diff-split-col {
        border-right: none !important;
        border-bottom: 1.5px solid var(--border) !important;
      }
    }


    /* Modern Balanced Segmented Navigation Bar */
    .tool-nav-bar {
      display: flex;
      gap: 6px;
      margin: 24px 0 20px;
      padding: 6px;
      background: #F1F5F9;
      border: 1px solid var(--border);
      border-radius: 14px;
      box-sizing: border-box;
      width: 100%;
    }
    .tool-tab-pill {
      flex: 1 1 0;
      min-width: 0;
      padding: 10px 8px;
      font-size: 13.5px;
      font-weight: 700;
      cursor: pointer;
      border-radius: 10px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      white-space: nowrap;
      transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
      border: none;
      background: transparent;
      color: #64748B;
    }
    .tool-tab-pill:hover {
      color: #0F172A;
      background: rgba(255, 255, 255, 0.7);
    }
    .tool-tab-pill.active {
      background: #FFFFFF !important;
      color: var(--primary) !important;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
      font-weight: 800;
    }
    #tabBtnPRD.active { color: #2563EB !important; }
    #tabBtnCopy.active { color: #E11D48 !important; }
    #tabBtnLegal.active { color: #7C3AED !important; }
    #tabBtnPDF.active { color: #D97706 !important; }
    #tabBtnImg.active { color: #059669 !important; }

    /* Clean Card Styling - Symmetric & Modern */
    .card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 30px;
      box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.02);
      margin-bottom: 24px;
      position: relative;
      transition: border-color 0.25s ease;
    }
    #viewPRD .card { border-top: 3.5px solid #2563EB; }
    #viewCopywriter .card { border-top: 3.5px solid #E11D48; }
    #viewLegalDoc .card { border-top: 3.5px solid #7C3AED; }
    #viewPDF .card { border-top: 3.5px solid #D97706; }
    #viewImageStudio .card { border-top: 3.5px solid #059669; }

    @media (max-width: 768px) {
      .tool-nav-bar {
        margin: 16px 0 14px !important;
        padding: 4px !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: none !important;
      }
      .tool-nav-bar::-webkit-scrollbar { display: none !important; }
      .tool-tab-pill {
        flex: 0 0 auto !important;
        padding: 8px 12px !important;
        font-size: 12px !important;
        border-radius: 8px !important;
      }
    }