:root {
      --primary-blue: #005691;
      --secondary-blue: #007acc;
      --dark-blue: #003e6b;
      --light-blue: #eaf3fb;
      --warning-orange: #ff9900;
      --warning-light: #fff4e5;
      --success-green: #2e8b57;
      --success-light: #e6f7ec;
      --error-red: #dc3545;
      --error-light: #f8d7da;
      --info-blue: #17a2b8;
      --info-light: #d1ecf1;
      --gray-light: #f9fbfc;
      --gray-medium: #f4f4f4;
      --gray-dark: #777;
      --text-primary: #333;
      --border-color: #ccc;
      --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
      --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
      --border-radius: 8px;
      --transition: all 0.3s ease;
      --primary-red: #dc3545;
      --secondary-red: #c82333;
      --dark-red: #a71e2a;
      --light-red: #f8d7da;
      --red-gradient: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
      line-height: 1.6;
      color: var(--text-primary);
      background: linear-gradient(135deg, var(--gray-light) 0%, #ffffff 100%);
      min-height: 100vh;
      scroll-behavior: smooth;
    }

    .container {
      max-width: 1000px;
      margin: 0 auto;
      padding: 2rem;
    }

    /* Table of Contents - Red Theme */
    .toc {
      position: relative;
      background: var(--red-gradient);
      color: white;
      border-radius: var(--border-radius);
      padding: 1.5rem;
      margin-bottom: 2rem;
      box-shadow: var(--shadow-hover);
      border-left: 4px solid var(--dark-red);
      z-index: 100;
    }

    .toc h3 {
      color: white;
      margin-bottom: 1rem;
      font-size: 1.2rem;
      text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    }

    .toc-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 0.5rem;
    }

    .toc-item {
      padding: 0.5rem 1rem;
      background: rgba(255,255,255,0.15);
      border-radius: 20px;
      transition: var(--transition);
      border: 2px solid transparent;
      backdrop-filter: blur(10px);
    }

    .toc-item:hover {
      background: rgba(255,255,255,0.25);
      border-color: rgba(255,255,255,0.3);
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }

    .toc-link {
      text-decoration: none;
      color: white;
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
    }

    .toc-link:hover {
      color: #fff;
    }

    /* Header Styles */
    header {
      background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
      color: white;
      padding: 3rem 2rem;
      border-radius: var(--border-radius);
      margin-bottom: 2rem;
      box-shadow: var(--shadow-hover);
      position: relative;
      overflow: hidden;
      text-align: center;
    }

    header::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -50%;
      width: 100%;
      height: 200%;
      background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
      transform: rotate(45deg);
      animation: shimmer 4s infinite;
    }

    @keyframes shimmer {
      0% { transform: translateX(-100%) rotate(45deg); }
      100% { transform: translateX(100%) rotate(45deg); }
    }

    header h1 {
      font-size: 2.8rem;
      margin-bottom: 1rem;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
      position: relative;
      z-index: 1;
    }

    .header-subtitle {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 1.5rem;
      position: relative;
      z-index: 1;
    }

    .header-note {
      background: rgba(255,255,255,0.15);
      padding: 1.5rem;
      border-radius: 8px;
      backdrop-filter: blur(10px);
      margin-top: 1rem;
      text-align: left;
      position: relative;
      z-index: 1;
      border: 1px solid rgba(255,255,255,0.2);
    }

    /* Quick Status Indicator */
    .status-indicator {
      position: fixed;
      top: 2rem;
      right: 2rem;
      background: white;
      border-radius: 50px;
      padding: 0.75rem 1.5rem;
      box-shadow: var(--shadow);
      z-index: 1000;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 500;
      font-size: 0.9rem;
    }

    .status-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--warning-orange);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.5; }
    }

    /* Environment Section */
    .env-section {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      background: white;
      border-radius: var(--border-radius);
      padding: 2rem;
      margin-bottom: 2rem;
      box-shadow: var(--shadow);
      border-top: 4px solid var(--warning-orange);
    }

    .env-section h2 {
      grid-column: 1 / -1;
      color: var(--primary-blue);
      margin-bottom: 1.5rem;
      font-size: 1.8rem;
      text-align: center;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
    }

    .env-box {
      background: var(--warning-light);
      padding: 1.5rem;
      border-radius: 8px;
      border: 2px solid var(--warning-orange);
      transition: var(--transition);
      position: relative;
    }

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

    .env-box h3 {
      color: var(--dark-blue);
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 1.2rem;
    }

    .connection-box {
      background: rgba(255,255,255,0.8);
      border: 1px solid var(--warning-orange);
      border-radius: 6px;
      padding: 1rem;
      font-family: 'Consolas', monospace;
      font-size: 0.9rem;
      position: relative;
    }

    .connection-box strong {
      color: var(--dark-blue);
      display: inline-block;
      min-width: 100px;
    }

    .copy-connection {
      position: absolute;
      top: 0.5rem;
      right: 0.5rem;
      background: var(--secondary-blue);
      color: white;
      border: none;
      padding: 0.25rem 0.5rem;
      border-radius: 4px;
      cursor: pointer;
      font-size: 0.7rem;
      opacity: 0;
      transition: var(--transition);
    }

    .env-box:hover .copy-connection {
      opacity: 1;
    }

    /* Section Styles */
    .section {
      background: white;
      border-radius: var(--border-radius);
      padding: 2.5rem;
      margin-bottom: 2rem;
      box-shadow: var(--shadow);
      position: relative;
      transition: var(--transition);
    }

    .section:hover {
      box-shadow: var(--shadow-hover);
    }

    .section h2 {
      color: var(--primary-blue);
      font-size: 2rem;
      margin-bottom: 2rem;
      padding-bottom: 1rem;
      border-bottom: 3px solid var(--light-blue);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .section h3 {
      color: var(--dark-blue);
      font-size: 1.4rem;
      margin: 2rem 0 1rem 0;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .section h3::before {
      content: '▶';
      color: var(--secondary-blue);
      font-size: 1rem;
    }

    /* Step Styles */
    .step {
      background: linear-gradient(135deg, var(--gray-light) 0%, white 100%);
      border-left: 4px solid var(--secondary-blue);
      border-radius: 0 var(--border-radius) var(--border-radius) 0;
      padding: 2rem;
      margin: 2.5rem 0;
      position: relative;
      transition: var(--transition);
    }

    .step:hover {
      transform: translateX(5px);
      box-shadow: var(--shadow);
    }

    .step::before {
      content: '';
      position: absolute;
      left: -8px;
      top: 2rem;
      width: 16px;
      height: 16px;
      background: var(--secondary-blue);
      border-radius: 50%;
      box-shadow: 0 0 0 4px white;
    }

    .step-number {
      background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
      color: white;
      width: 2.5rem;
      height: 2.5rem;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      margin-right: 1rem;
      flex-shrink: 0;
      box-shadow: var(--shadow);
      font-size: 1.1rem;
    }

    .step-title {
      display: flex;
      align-items: center;
      margin-bottom: 1.5rem;
      font-size: 1.3rem;
      font-weight: 600;
      color: var(--dark-blue);
    }

    .step-status {
      margin-left: auto;
      padding: 0.25rem 0.75rem;
      border-radius: 15px;
      font-size: 0.8rem;
      font-weight: 500;
      background: var(--warning-light);
      color: var(--warning-orange);
      border: 1px solid var(--warning-orange);
    }

    .step-status.completed {
      background: var(--success-light);
      color: var(--success-green);
      border-color: var(--success-green);
    }

    .step-status.error {
      background: var(--error-light);
      color: var(--error-red);
      border-color: var(--error-red);
    }

    /* Progress Tracker */
    .progress-tracker {
      background: var(--light-blue);
      border-radius: var(--border-radius);
      padding: 1.5rem;
      margin: 2rem 0;
      border: 2px solid var(--secondary-blue);
    }

    .progress-steps {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
    }

    .progress-step {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.5rem 1rem;
      background: white;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 500;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
      transition: var(--transition);
      cursor: pointer;
    }

    .progress-step:hover {
      transform: scale(1.05);
    }

    .progress-step.completed {
      background: var(--success-green);
      color: white;
    }

    .progress-step.current {
      background: var(--warning-orange);
      color: white;
      animation: pulse 2s infinite;
    }

    /* Code Styles */
    .code-container {
      position: relative;
      margin: 2rem 0;
      border-radius: var(--border-radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-color);
    }

    .code-header {
      background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue));
      color: white;
      padding: 1rem 1.5rem;
      font-size: 0.95rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 500;
    }

    .copy-btn {
      background: var(--secondary-blue);
      color: white;
      border: none;
      padding: 0.4rem 1rem;
      border-radius: 5px;
      cursor: pointer;
      font-size: 0.85rem;
      transition: var(--transition);
      font-weight: 500;
    }

    .copy-btn:hover {
      background: var(--success-green);
      transform: scale(1.05);
    }

    .copy-btn.copied {
      background: var(--success-green);
      transform: scale(1.05);
    }

    pre {
      background: var(--gray-medium);
      padding: 2rem;
      margin: 0;
      overflow-x: auto;
      font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace;
      font-size: 0.9rem;
      line-height: 1.5;
      border-top: 1px solid var(--border-color);
      position: relative;
    }

    pre::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, var(--secondary-blue), transparent);
    }

    code {
      background: var(--gray-medium);
      padding: 0.3rem 0.5rem;
      border-radius: 4px;
      font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
      font-size: 0.9em;
      border: 1px solid #ddd;
    }

    /* Alert Boxes */
    .alert {
      padding: 1.5rem 2rem;
      border-radius: var(--border-radius);
      margin: 2rem 0;
      border-left: 5px solid;
      position: relative;
      animation: slideIn 0.6s ease-out;
      box-shadow: var(--shadow);
    }

    @keyframes slideIn {
      from { opacity: 0; transform: translateY(-10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .alert-info {
      background: var(--info-light);
      border-left-color: var(--info-blue);
      color: #0c5460;
    }

    .alert-warning {
      background: var(--warning-light);
      border-left-color: var(--warning-orange);
      color: #856404;
    }

    .alert-success {
      background: var(--success-light);
      border-left-color: var(--success-green);
      color: #155724;
    }

    .alert-error {
      background: var(--error-light);
      border-left-color: var(--error-red);
      color: #721c24;
    }

    .alert::before {
      font-size: 1.2rem;
      margin-right: 0.5rem;
    }

    .alert-info::before { content: 'ℹ️'; }
    .alert-warning::before { content: '⚠️'; }
    .alert-success::before { content: '✅'; }
    .alert-error::before { content: '❌'; }

    /* Command Examples */
    .command-example {
      background: var(--info-light);
      border: 1px solid var(--info-blue);
      border-radius: var(--border-radius);
      padding: 1rem;
      margin: 1rem 0;
      font-family: monospace;
      position: relative;
    }

    .command-example::before {
      content: '$ ';
      color: var(--info-blue);
      font-weight: bold;
    }

    /* Footer Styles */
    footer {
      background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
      color: white;
      padding: 3rem 2rem;
      text-align: center;
      border-radius: var(--border-radius);
      margin-top: 4rem;
      box-shadow: var(--shadow-hover);
      position: relative;
      overflow: hidden;
    }

    footer::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--warning-orange), var(--secondary-blue), var(--success-green));
    }

    .footer-content {
      max-width: 800px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }

    .footer-info {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 2rem;
      margin-bottom: 2rem;
    }

    .footer-section h4 {
      margin-bottom: 1rem;
      color: var(--warning-orange);
    }

    .footer-section ul {
      list-style: none;
    }

    .footer-section li {
      padding: 0.25rem 0;
      opacity: 0.9;
    }

    /* Scroll to top button */
    .scroll-top {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      width: 60px;
      height: 60px;
      background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
      color: white;
      border: none;
      border-radius: 50%;
      cursor: pointer;
      font-size: 1.5rem;
      box-shadow: var(--shadow);
      transition: var(--transition);
      opacity: 0;
      visibility: hidden;
      z-index: 1000;
    }

    .scroll-top.visible {
      opacity: 1;
      visibility: visible;
    }

    .scroll-top:hover {
      transform: translateY(-5px) scale(1.1);
      box-shadow: var(--shadow-hover);
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .container {
        padding: 1rem;
      }
      
      header {
        padding: 2rem 1rem;
      }
      
      header h1 {
        font-size: 2.2rem;
      }
      
      .env-section {
        grid-template-columns: 1fr;
        gap: 1rem;
      }
      
      .section {
        padding: 1.5rem;
      }

      .toc {
        padding: 1rem;
        margin-bottom: 1.5rem;
      }
      
      .toc-list {
        grid-template-columns: 1fr;
        gap: 0.3rem;
      }
      
      .toc-item {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
      }

      .step {
        padding: 1.5rem;
        transform: none;
      }

      .step:hover {
        transform: none;
      }

      .step-title {
        font-size: 1.1rem;
      }

      .step-number {
        width: 2rem;
        height: 2rem;
        font-size: 1rem;
      }

      .progress-steps {
        flex-direction: column;
        align-items: stretch;
      }

      .status-indicator {
        position: relative;
        top: auto;
        right: auto;
        margin-bottom: 1rem;
        align-self: center;
      }

      pre {
        font-size: 0.8rem;
        padding: 1rem;
      }
    }

    /* Print Styles */
    @media print {
      .toc,
      .status-indicator,
      .scroll-top,
      .copy-btn,
      .copy-connection {
        display: none !important;
      }
      
      .section {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
        margin-bottom: 1rem;
      }
      
      .step {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
      }
      
      body {
        background: white;
      }
    }

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

    .copy-btn:focus,
    .toc-item:focus,
    .scroll-top:focus {
      outline: 2px solid var(--warning-orange);
      outline-offset: 2px;
    }

    /* High contrast mode support */
    @media (prefers-contrast: high) {
      .alert {
        border-width: 2px;
      }
      
      .step {
        border-left-width: 6px;
      }
    }

    /* Reduced motion support */
    @media (prefers-reduced-motion: reduce) {
      * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }
      
      .scroll-top {
        transition: opacity 0.3s ease;
      }
    }