/* ============================================
       DESIGN SYSTEM & CSS VARIABLES
       ============================================ */
    :root {
      /* Light Theme */
      --bg-primary: #F8FAFC;
      --bg-secondary: #FFFFFF;
      --bg-tertiary: #F1F5F9;
      --bg-glass: rgba(255, 255, 255, 0.85);
      --bg-glass-strong: rgba(255, 255, 255, 0.95);
      
      --text-primary: #0F172A;
      --text-secondary: #475569;
      --text-muted: #94A3B8;
      --text-accent: #1E40AF;
      
      --border-light: rgba(148, 163, 184, 0.2);
      --border-medium: rgba(148, 163, 184, 0.3);
      
      --accent-blue: #3B82F6;
      --accent-green: #10B981;
      --accent-amber: #F59E0B;
      --accent-red: #EF4444;
      --accent-purple: #8B5CF6;
      
      --gradient-bg: linear-gradient(135deg, #E0E7FF 0%, #DBEAFE 25%, #ECFDF5 50%, #FEF3C7 75%, #FCE7F3 100%);
      --gradient-card: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(248,250,252,0.9) 100%);
      
      --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 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, 0.05);
      --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
      
      --cloud-1: rgba(59, 130, 246, 0.08);
      --cloud-2: rgba(16, 185, 129, 0.06);
      --cloud-3: rgba(139, 92, 246, 0.05);
      --cloud-4: rgba(245, 158, 11, 0.04);
      
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
      
      --transition-fast: 150ms ease;
      --transition-normal: 250ms ease;
      --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

      --header-offset: 88px;
    }

    @media (max-width: 768px) {
      :root {
        --header-offset: 76px;
      }
    }

    [data-theme="dark"] {
      --bg-primary: #0F172A;
      --bg-secondary: #1E293B;
      --bg-tertiary: #334155;
      --bg-glass: rgba(30, 41, 59, 0.85);
      --bg-glass-strong: rgba(30, 41, 59, 0.95);
      
      --text-primary: #F1F5F9;
      --text-secondary: #CBD5E1;
      --text-muted: #64748B;
      --text-accent: #60A5FA;
      
      --border-light: rgba(148, 163, 184, 0.1);
      --border-medium: rgba(148, 163, 184, 0.2);
      
      --gradient-bg: linear-gradient(135deg, #0F172A 0%, #1E1B4B 25%, #0F172A 50%, #1A2E05 75%, #0F172A 100%);
      --gradient-card: linear-gradient(180deg, rgba(30,41,59,0.9) 0%, rgba(15,23,42,0.9) 100%);
      
      --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.2);
      
      --cloud-1: rgba(59, 130, 246, 0.12);
      --cloud-2: rgba(16, 185, 129, 0.08);
      --cloud-3: rgba(139, 92, 246, 0.1);
      --cloud-4: rgba(245, 158, 11, 0.06);
    }

    /* ============================================
       RESET & BASE
       ============================================ */
    *, *::before, *::after {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      scroll-padding-top: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, Oxygen, Ubuntu, sans-serif;
      background: var(--gradient-bg);
      color: var(--text-primary);
      line-height: 1.6;
      min-height: 100vh;
      min-height: 100dvh;
      overflow: hidden;
      position: relative;
    }

    /* ============================================
       ANIMATED BACKGROUND CLOUDS
       ============================================ */
    .clouds-container {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 0;
      overflow: hidden;
    }

    .cloud {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      opacity: 0.7;
      transition: transform 0.3s ease-out, opacity 0.3s ease;
      will-change: transform;
    }

    .cloud-1 {
      width: 600px;
      height: 600px;
      background: var(--cloud-1);
      top: -200px;
      left: -100px;
      animation: float1 25s ease-in-out infinite;
    }

    .cloud-2 {
      width: 500px;
      height: 500px;
      background: var(--cloud-2);
      top: 50%;
      right: -150px;
      animation: float2 30s ease-in-out infinite;
    }

    .cloud-3 {
      width: 450px;
      height: 450px;
      background: var(--cloud-3);
      bottom: -100px;
      left: 30%;
      animation: float3 20s ease-in-out infinite;
    }

    .cloud-4 {
      width: 350px;
      height: 350px;
      background: var(--cloud-4);
      top: 40%;
      left: 10%;
      animation: float4 35s ease-in-out infinite;
    }

    @keyframes float1 {
      0%, 100% { transform: translate(0, 0) scale(1); }
      25% { transform: translate(50px, 30px) scale(1.05); }
      50% { transform: translate(20px, 60px) scale(0.95); }
      75% { transform: translate(-30px, 20px) scale(1.02); }
    }

    @keyframes float2 {
      0%, 100% { transform: translate(0, 0) scale(1); }
      33% { transform: translate(-40px, -50px) scale(1.08); }
      66% { transform: translate(30px, 40px) scale(0.92); }
    }

    @keyframes float3 {
      0%, 100% { transform: translate(0, 0) scale(1); }
      50% { transform: translate(-60px, -40px) scale(1.1); }
    }

    @keyframes float4 {
      0%, 100% { transform: translate(0, 0) scale(1); }
      25% { transform: translate(40px, -30px) scale(1.05); }
      75% { transform: translate(-20px, 50px) scale(0.95); }
    }

    /* ============================================
       MAIN LAYOUT
       ============================================ */
    .app-container {
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      height: 100vh;
      height: 100dvh;
      max-width: 100%;
      overflow: hidden;
      padding-top: var(--header-offset);
      padding-bottom: var(--mobile-bottom-bar-height);
    }

    .brand-strip {
      display: flex;
      align-items: center;
      justify-content: flex-start;
      padding: 10px 0;
      margin-bottom: 12px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 700;
      font-size: 16px;
    }

    .brand-text {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-primary);
      letter-spacing: -0.02em;
    }

    .brand-tag {
      font-size: 10px;
      font-weight: 500;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      display: none;
    }

    @media (min-width: 768px) {
      .brand-tag { display: block; }
    }

    /* Main Content Area */
    .main-content {
      flex: 1;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      padding: 0 16px;
    }

    @media (min-width: 768px) {
      .main-content {
        padding: 0 32px;
      }
    }

    @media (min-width: 1200px) {
      .main-content {
        padding: 0 48px;
        max-width: 1400px;
        margin: 0 auto;
        width: 100%;
      }
    }

    /* ============================================
       TAB NAVIGATION
       ============================================ */
    .tab-nav-container {
      flex-shrink: 0;
      margin-bottom: 16px;
    }

    .tab-nav-scroll {
      display: flex;
      gap: 6px;
      overflow-x: auto;
      padding: 8px 4px;
      scrollbar-width: none;
      -ms-overflow-style: none;
      scroll-behavior: smooth;
    }

    .tab-nav-scroll::-webkit-scrollbar {
      display: none;
    }

    .tab-btn {
      flex-shrink: 0;
      padding: 10px 16px;
      background: var(--bg-glass);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      color: var(--text-secondary);
      font-size: 13px;
      font-weight: 500;
      cursor: pointer;
      transition: all var(--transition-fast);
      white-space: nowrap;
      position: relative;
      overflow: hidden;
    }

    .tab-btn:hover {
      background: var(--bg-glass-strong);
      color: var(--text-primary);
      border-color: var(--border-medium);
    }

    .tab-btn.active {
      background: var(--bg-secondary);
      color: var(--text-accent);
      border-color: var(--accent-blue);
      box-shadow: var(--shadow-md), 0 0 0 1px var(--accent-blue);
    }

    .tab-btn-number {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      background: var(--bg-tertiary);
      border-radius: 50%;
      font-size: 10px;
      font-weight: 600;
      margin-right: 8px;
      color: var(--text-muted);
    }

    .tab-btn.active .tab-btn-number {
      background: var(--accent-blue);
      color: white;
    }

    /* Category Tabs (Desktop) */
    .category-nav {
      display: none;
      gap: 8px;
      margin-bottom: 12px;
      flex-wrap: wrap;
    }

    @media (min-width: 768px) {
      .category-nav {
        display: flex;
      }
    }

    .category-btn {
      padding: 8px 16px;
      background: transparent;
      border: 1px solid var(--border-light);
      border-radius: 100px;
      color: var(--text-muted);
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
      transition: all var(--transition-fast);
    }

    .category-btn:hover {
      color: var(--text-secondary);
      border-color: var(--border-medium);
    }

    .category-btn.active {
      background: var(--accent-blue);
      border-color: var(--accent-blue);
      color: white;
    }

    /* ============================================
       PANEL CONTENT
       ============================================ */
    .panels-container {
      flex: 1;
      position: relative;
      overflow: hidden;
    }

    .panel {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      padding-bottom: calc(var(--mobile-bottom-bar-height) + 24px);
      opacity: 0;
      visibility: hidden;
      transform: translateX(20px);
      transition: all var(--transition-slow);
      overflow-y: auto;
      scrollbar-width: thin;
      scrollbar-color: var(--border-medium) transparent;
    }

    .panel::-webkit-scrollbar {
      width: 6px;
    }

    .panel::-webkit-scrollbar-track {
      background: transparent;
    }

    .panel::-webkit-scrollbar-thumb {
      background: var(--border-medium);
      border-radius: 3px;
    }

    .panel.active {
      opacity: 1;
      visibility: visible;
      transform: translateX(0);
    }

    .panel-card {
      background: var(--bg-glass-strong);
      backdrop-filter: blur(20px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-lg);
    }

    @media (min-width: 768px) {
      .panel-card {
        padding: 32px;
      }
    }

    .panel-header {
      margin-bottom: 20px;
      flex-shrink: 0;
    }

    .panel-category {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      background: var(--bg-tertiary);
      border-radius: 100px;
      font-size: 11px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 12px;
    }

    .panel-category-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent-green);
    }

    .panel-title {
      font-size: 22px;
      font-weight: 700;
      color: var(--text-primary);
      line-height: 1.3;
      letter-spacing: -0.02em;
      margin-bottom: 8px;
    }

    @media (min-width: 768px) {
      .panel-title {
        font-size: 26px;
      }
    }

    .panel-subtitle {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.5;
    }

    .panel-body {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 20px;
      overflow-y: auto;
      min-height: 0;
    }

    @media (min-width: 992px) {
      .panel-body {
        flex-direction: row;
        gap: 24px;
      }
    }

    .panel-section {
      flex: 1;
      min-width: 0;
    }

    .section-label {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 11px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 12px;
    }

    .section-icon {
      width: 16px;
      height: 16px;
      opacity: 0.7;
    }

    /* Scenario Box */
    .scenario-box {
      background: var(--bg-tertiary);
      border-radius: var(--radius-md);
      padding: 16px;
      border-left: 3px solid var(--accent-blue);
    }

    .scenario-text {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* Prompt Box */
    .prompt-box {
      background: var(--bg-secondary);
      border: 1px solid var(--border-medium);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .prompt-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: var(--bg-tertiary);
      border-bottom: 1px solid var(--border-light);
    }

    .prompt-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
    }

    .copy-btn {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 6px 12px;
      background: var(--accent-blue);
      border: none;
      border-radius: var(--radius-sm);
      color: white;
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
      transition: all var(--transition-fast);
    }

    .copy-btn:hover {
      background: #2563EB;
      transform: translateY(-1px);
    }

    .copy-btn.copied {
      background: var(--accent-green);
    }

    .prompt-content {
      padding: 16px;
      font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
      font-size: 13px;
      line-height: 1.7;
      color: var(--text-primary);
      white-space: pre-wrap;
      max-height: 200px;
      overflow-y: auto;
    }

    @media (min-width: 768px) {
      .prompt-content {
        max-height: none;
      }
    }

    /* Safety Indicator */
    .safety-indicator {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 12px 16px;
      background: rgba(16, 185, 129, 0.1);
      border: 1px solid rgba(16, 185, 129, 0.2);
      border-radius: var(--radius-md);
      margin-top: 12px;
    }

    .safety-icon {
      width: 18px;
      height: 18px;
      color: var(--accent-green);
    }

    .safety-text {
      font-size: 13px;
      color: var(--text-secondary);
      flex: 1;
    }

    /* Job Application Box */
    .job-box {
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.08));
      border: 1px solid rgba(59, 130, 246, 0.2);
      border-radius: var(--radius-md);
      padding: 16px;
    }

    .job-role {
      display: inline-block;
      padding: 4px 10px;
      background: var(--accent-blue);
      border-radius: var(--radius-sm);
      font-size: 11px;
      font-weight: 600;
      color: white;
      margin-bottom: 10px;
    }

    .job-text {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* Toggle Buttons */
    .toggles-container {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .toggle-btn {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 8px 14px;
      background: var(--bg-tertiary);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-size: 12px;
      color: var(--text-secondary);
      cursor: pointer;
      transition: all var(--transition-fast);
    }

    .toggle-btn:hover {
      background: var(--bg-secondary);
      border-color: var(--border-medium);
    }

    .toggle-btn.active {
      background: var(--accent-blue);
      border-color: var(--accent-blue);
      color: white;
    }

    /* Reveal Box */
    .reveal-box {
      background: var(--bg-tertiary);
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-top: 12px;
    }

    .reveal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      cursor: pointer;
      transition: background var(--transition-fast);
    }

    .reveal-header:hover {
      background: rgba(0, 0, 0, 0.02);
    }

    [data-theme="dark"] .reveal-header:hover {
      background: rgba(255, 255, 255, 0.02);
    }

    .reveal-title {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-secondary);
    }

    .reveal-icon {
      width: 20px;
      height: 20px;
      color: var(--text-muted);
      transition: transform var(--transition-fast);
    }

    .reveal-box.open .reveal-icon {
      transform: rotate(180deg);
    }

    .reveal-content {
      display: none;
      padding: 0 16px 16px;
    }

    .reveal-box.open .reveal-content {
      display: block;
    }

    .reveal-text {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* ============================================
       LETTER WRITER PANEL (SPECIAL)
       ============================================ */
    .letter-writer {
      display: flex;
      flex-direction: column;
      gap: 20px;
      height: 100%;
    }

    @media (min-width: 992px) {
      .letter-writer {
        flex-direction: row;
      }
    }

    .letter-inputs {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .input-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .input-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .input-field {
      width: 100%;
      padding: 12px 16px;
      background: var(--bg-secondary);
      border: 1px solid var(--border-medium);
      border-radius: var(--radius-md);
      font-size: 14px;
      color: var(--text-primary);
      transition: all var(--transition-fast);
      font-family: inherit;
    }

    .input-field:focus {
      outline: none;
      border-color: var(--accent-blue);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    }

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

    textarea.input-field {
      resize: vertical;
      min-height: 80px;
    }

    .select-field {
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 12px center;
      padding-right: 40px;
    }

    .letter-output {
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .output-prompt {
      flex: 1;
      background: var(--bg-secondary);
      border: 1px solid var(--border-medium);
      border-radius: var(--radius-md);
      padding: 16px;
      font-family: 'SF Mono', 'Fira Code', monospace;
      font-size: 13px;
      line-height: 1.7;
      color: var(--text-primary);
      min-height: 200px;
      overflow-y: auto;
    }

    .letter-toggles {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .letter-toggle {
      padding: 8px 16px;
      background: var(--bg-tertiary);
      border: 1px solid var(--border-light);
      border-radius: 100px;
      font-size: 12px;
      font-weight: 500;
      color: var(--text-secondary);
      cursor: pointer;
      transition: all var(--transition-fast);
    }

    .letter-toggle:hover {
      background: var(--bg-secondary);
      border-color: var(--accent-blue);
      color: var(--accent-blue);
    }

    .letter-toggle.active {
      background: var(--accent-blue);
      border-color: var(--accent-blue);
      color: white;
    }

    .generate-btn {
      width: 100%;
      padding: 14px 24px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
      border: none;
      border-radius: var(--radius-md);
      color: white;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition-fast);
      margin-top: 16px;
    }

    .generate-btn:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
    }

    /* ============================================
       PROGRESS INDICATOR
       ============================================ */
    .progress-bar {
      position: fixed;
      bottom: var(--mobile-bottom-bar-height);
      left: 0;
      right: 0;
      height: 3px;
      background: var(--bg-tertiary);
      z-index: 100;
    }

    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
      transition: width var(--transition-fast);
    }

    /* ============================================
       DATA SAFETY BADGES
       ============================================ */
    .data-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      border-radius: 100px;
      font-size: 11px;
      font-weight: 600;
    }

    .data-badge.safe {
      background: rgba(16, 185, 129, 0.15);
      color: var(--accent-green);
    }

    .data-badge.caution {
      background: rgba(245, 158, 11, 0.15);
      color: var(--accent-amber);
    }

    .data-badge.risk {
      background: rgba(239, 68, 68, 0.15);
      color: var(--accent-red);
    }

    /* ============================================
       TOAST NOTIFICATION
       ============================================ */
    .toast {
      position: fixed;
      bottom: calc(var(--mobile-bottom-bar-height) + 20px);
      left: 50%;
      transform: translateX(-50%) translateY(100px);
      padding: 12px 24px;
      background: var(--bg-secondary);
      border: 1px solid var(--border-medium);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      font-size: 14px;
      color: var(--text-primary);
      z-index: 200;
      opacity: 0;
      transition: all var(--transition-normal);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .toast.show {
      transform: translateX(-50%) translateY(0);
      opacity: 1;
    }

    .toast-icon {
      width: 18px;
      height: 18px;
      color: var(--accent-green);
    }

    /* ============================================
       INTRO PANEL (SPECIAL)
       ============================================ */
    .intro-content {
      text-align: center;
      max-width: 600px;
      margin: 0 auto;
    }

    .intro-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
      border: 1px solid rgba(59, 130, 246, 0.2);
      border-radius: 100px;
      font-size: 12px;
      font-weight: 600;
      color: var(--text-accent);
      margin-bottom: 24px;
    }

    .intro-title {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1.2;
      margin-bottom: 16px;
      letter-spacing: -0.03em;
    }

    @media (min-width: 768px) {
      .intro-title {
        font-size: 36px;
      }
    }

    .intro-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 32px;
    }

    .intro-features {
      display: grid;
      grid-template-columns: 1fr;
      gap: 16px;
      text-align: left;
    }

    @media (min-width: 600px) {
      .intro-features {
        grid-template-columns: 1fr 1fr;
      }
    }

    .intro-feature {
      display: flex;
      gap: 12px;
      padding: 16px;
      background: var(--bg-tertiary);
      border-radius: var(--radius-md);
    }

    .intro-feature-icon {
      flex-shrink: 0;
      width: 36px;
      height: 36px;
      background: var(--accent-blue);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
    }

    .intro-feature-text h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 4px;
    }

    .intro-feature-text p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .start-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 28px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
      border: none;
      border-radius: var(--radius-md);
      color: white;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition-fast);
      margin-top: 32px;
    }

    .start-btn:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg), var(--shadow-glow);
    }

    /* ============================================
       UTILITIES
       ============================================ */
    .visually-hidden {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }