:root {
      --spacing-xs: 4px;
      --spacing-sm: 8px;
      --spacing-md: 16px;
      --spacing-lg: 24px;
      --spacing-xl: 32px;
      --spacing-2xl: 48px;
      
      --color-slate-50: #f8fafc;
      --color-slate-100: #f1f5f9;
      --color-slate-200: #e2e8f0;
      --color-slate-300: #cbd5e1;
      --color-slate-400: #94a3b8;
      --color-slate-500: #64748b;
      --color-slate-600: #475569;
      --color-slate-700: #334155;
      --color-slate-800: #1e293b;
      --color-slate-900: #0f172a;
      
      --color-indigo-50: #eef2ff;
      --color-indigo-100: #e0e7ff;
      --color-indigo-500: #6366f1;
      --color-indigo-600: #4f46e5;
      --color-indigo-700: #4338ca;
      
      --color-emerald-50: #f0fdf4;
      --color-emerald-500: #10b981;
      --color-emerald-600: #059669;
      
      --color-amber-50: #fffbeb;
      --color-amber-500: #f59e0b;
      
      --color-rose-50: #fff5f5;
      --color-rose-500: #f43f5e;
      
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --radius-xl: 18px;
      
      --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
      --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
      
      --transition-base: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
      --transition-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    html, body {
      height: 100%;
      width: 100%;
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
      background: var(--color-slate-50);
      color: var(--color-slate-900);
      line-height: 1.6;
    }
    
    .container {
      max-width: 1000px;
      margin: 0 auto;
      padding: var(--spacing-lg);
      background-color: var(--color-slate-700);
    }
    
    /* ===== HEADER ===== */
    .header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: var(--spacing-2xl);
      padding-bottom: var(--spacing-lg);
      border-bottom: 1px solid var(--color-slate-200);
      gap: var(--spacing-lg);
      flex-wrap: wrap;
    }
    
    .header-left {
      display: flex;
      align-items: center;
      gap: var(--spacing-md);
    }
    
    .logo {
      font-size: 32px;
      line-height: 1;
    }
    
    .header h1 {
      font-size: 24px;
      font-weight: 700;
      color: var(--color-slate-900);
      letter-spacing: -0.3px;
    }
    
    .header p {
      font-size: 12px;
      color: var(--color-slate-500);
      text-transform: uppercase;
      letter-spacing: 0.8px;
    }
    
    .btn-connect {
      padding: var(--spacing-sm) var(--spacing-md);
      background: var(--color-indigo-600);
      color: white;
      border: none;
      border-radius: var(--radius-md);
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition-base);
      white-space: nowrap;
    }
    
    .btn-connect:hover {
      background-color: var(--color-emerald-500);
      box-shadow: var(--shadow-md);
      transform: translateY(-1px);
    }
    
    /* ===== CARDS LAYOUT ===== */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: var(--spacing-xl);
      margin-bottom: var(--spacing-2xl);
    }
    
    .card {
      background: white;

      background-color: var(--color-slate-400);
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-slate-200);
      padding: var(--spacing-xl);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      position: relative;
      overflow: hidden;
      margin-top: 20px;
    }
    
    .col {
      margin-top: 12px;
    }
    .card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--color-indigo-500) 0%, var(--color-indigo-600) 100%);
      opacity: 0;
      transition: opacity var(--transition-slow);
    }
    
    .card:hover {
      border-color: var(--color-indigo-100);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    
    .card:hover::before {
      opacity: 1;
    }
    
    .card-header {
      display: flex;
      align-items: center;
      gap: var(--spacing-md);
      margin-bottom: var(--spacing-lg);
      padding-bottom: var(--spacing-lg);
      border-bottom: 1px solid var(--color-slate-100);
    }
    
    .card-step {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: var(--color-indigo-50);
      border-radius: var(--radius-md);
      font-size: 16px;
      font-weight: 700;
      color: var(--color-indigo-600);
    }
    
    .card h2 {
      font-size: 16px;
      font-weight: 700;
      color: var(--color-slate-900);
      letter-spacing: -0.2px;
    }
    
    .card-subtitle {
      font-size: 12px;
      color: var(--color-slate-500);
      text-transform: uppercase;
      letter-spacing: 0.6px;
      margin-top: var(--spacing-xs);
    }
    
    /* ===== FORM GROUPS ===== */
    .form-row {
      display: grid;
      grid-template-columns: 1fr;
      gap: var(--spacing-md);
      margin-bottom: var(--spacing-md);
    }
    
    .form-row.dual {
      grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }
    
    .form-row.triple {
      grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    
    .form-group {
      display: flex;
      flex-direction: column;
    }
    
    label {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: var(--color-slate-600);
      margin-bottom: var(--spacing-sm);
    }
    
    select, input {
      padding: var(--spacing-sm) var(--spacing-md);
      border: 1px solid var(--color-slate-200);
      border-radius: var(--radius-md);
      font-size: 13px;
      font-family: inherit;
      transition: var(--transition-base);
      background: white;
      color: var(--color-slate-900);
    }
    
    input[type="number"] {
      font-variant-numeric: tabular-nums;
    }
    
    select:focus, input:focus {
      outline: none;
      border-color: var(--color-indigo-500);
      box-shadow: 0 0 0 3px var(--color-indigo-50);
    }
    
    select {
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23475569' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right var(--spacing-md) center;
      padding-right: 32px;
    }
    
    /* ===== BUTTON STYLES ===== */
    .btn {
      padding: var(--spacing-sm) var(--spacing-md);
      border: none;
      border-radius: var(--radius-md);
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition-base);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: var(--spacing-sm);
      text-decoration: none;
      white-space: nowrap;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      margin-top: 12px;
    }
    
    .btn-primary {
      background: var(--color-indigo-600);
      color: white;
    }
    
    .btn-primary:hover {
      background: var(--color-indigo-700);
      box-shadow: var(--shadow-md);
      transform: translateY(-1px);
    }
    
    .btn-success {
      background: var(--color-emerald-500);
      color: white;
    }
    
    .btn-success:hover {
      background: var(--color-emerald-600);
      box-shadow: var(--shadow-md);
      transform: translateY(-1px);
    }
    
    .btn-secondary {
      background: var(--color-slate-100);
      color: var(--color-slate-700);
    }
    
    .btn-secondary:hover {
      background: var(--color-slate-200);
      box-shadow: var(--shadow-sm);
    }
    
    .btn-group {
      display: flex;
      gap: var(--spacing-sm);
      flex-wrap: wrap;
      margin-top: var(--spacing-lg);
      margin-bottom: var(--spacing-md);
    }
    
    .btn:disabled {
      opacity: 0.5;
      cursor: not-allowed;
      transform: none !important;
    }
    
    /* ===== STATUS & ALERTS ===== */
    .status {
      font-size: 12px;
      padding: var(--spacing-sm) var(--spacing-md);
      border-radius: var(--radius-md);
      margin-top: var(--spacing-md);
      display: none;
      animation: slideIn 0.2s ease-out;
    }
    
    @keyframes slideIn {
      from {
        opacity: 0;
        transform: translateY(-4px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    .status.pending {
      background: var(--color-amber-50);
      color: #92400e;
      border: 1px solid #fbbf24;
    }
    
    .status.success {
      background: var(--color-emerald-50);
      color: #065f46;
      border: 1px solid #86efac;
    }
    
    .status.error {
      background: var(--color-rose-50);
      color: #831843;
      border: 1px solid #fb7185;
    }
    
    /* ===== INFO DISPLAY ===== */
    .info-display {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
      gap: var(--spacing-md);
      margin-top: var(--spacing-lg);
      display: none;
    }
    
    .info-item {
      background: var(--color-slate-50);
      border-radius: var(--radius-md);
      padding: var(--spacing-md);
      border: 1px solid var(--color-slate-100);
    }
    
    .info-label {
      font-size: 10px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: var(--color-slate-500);
      margin-bottom: var(--spacing-xs);
      font-weight: 700;
    }
    
    .info-value {
      font-size: 13px;
      font-weight: 700;
      color: var(--color-slate-900);
      word-break: break-all;
      font-family: 'Monaco', 'Courier New', monospace;
    }
    
    /* ===== OUTPUT & RESULTS ===== */
    .output-section {
      background: var(--color-slate-900);
      border-radius: var(--radius-lg);
      padding: var(--spacing-lg);
      margin-top: var(--spacing-lg);
      display: none;
    }
    
    .output-section.show {
      display: block;
    }
    
    pre {
      background: var(--color-slate-900);
      color: #10b981;
      font-family: 'Monaco', 'Courier New', monospace;
      font-size: 11px;
      line-height: 1.6;
      padding: var(--spacing-md);
      border-radius: var(--radius-md);
      overflow: auto;
      max-height: 200px;
      margin: 0;
    }
    
    .result-box {
      background: white;
      border: 2px solid var(--color-slate-200);
      border-radius: var(--radius-lg);
      padding: var(--spacing-lg);
      margin-top: var(--spacing-lg);
      display: none;
      animation: slideIn 0.3s ease-out;
    }
    
    .result-box.show {
      display: block;
    }
    
    .result-box.match {
      border-color: var(--color-emerald-500);
      background: var(--color-emerald-50);
    }
    
    .result-box.no-match {
      border-color: var(--color-rose-500);
      background: var(--color-rose-50);
    }
    
    .result-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: var(--spacing-md);
      display: flex;
      align-items: center;
      gap: var(--spacing-md);
    }
    
    .result-title.match {
      color: var(--color-emerald-600);
    }
    
    .result-title.no-match {
      color: var(--color-rose-600);
    }
    
    .result-desc {
      font-size: 13px;
      color: var(--color-slate-700);
      line-height: 1.6;
    }
    
    /* ===== DIVIDER ===== */
    .divider {
      height: 1px;
      background: var(--color-slate-200);
      margin: var(--spacing-2xl) 0;
    }
    
    /* ===== FOOTER ===== */
    /* footer {
      text-align: center;
      color: var(--color-slate-500);
      font-size: 12px;
      margin-top: var(--spacing-2xl);
      padding-top: var(--spacing-lg);
      border-top: 1px solid var(--color-slate-200);
    } */
    
    footer {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem 0;
    box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 20px;
    border-radius: var(--radius-lg);
  }

  .footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 2rem;
  }

  .footer-section {
    flex: 1;
  }

  .footer-section-title {
    color: white;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    text-align: center;
  }

  /* ===== SOCIAL LINKS ===== */
  .social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
  }

  .social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
  }

  .social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
  }

  .social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  }

  .social-link:hover::before {
    left: 100%;
  }

  .social-icon {
    width: 20px;
    height: 20px;
    display: block;
    position: relative;
    z-index: 1;
  }

  /* ===== CONTACT LINKS ===== */
  .contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: 50px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    font-weight: 500;
    font-size: 0.9rem;
  }

  .contact-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
  }

  .contact-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
  }

  .contact-link:hover::before {
    left: 100%;
  }

  .contact-icon {
    width: 20px;
    height: 20px;
    display: block;
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
  }

  .contact-link:hover .contact-icon {
    transform: scale(1.1);
  }

  .contact-text {
    position: relative;
    z-index: 1;
  }

  /* ===== FOOTER BRAND ===== */
  .footer-brand {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
  }

  .brand-text {
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    opacity: 0.95;
  }

  .copyright {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
  }

  /* ===== RESPONSIVE ===== */
  @media (max-width: 768px) {
    .footer-content {
      flex-direction: column;
      gap: 1.5rem;
    }

    .footer-section {
      text-align: center;
    }

    .social-links {
      justify-content: center;
      gap: 0.75rem;
    }

    .social-link {
      width: 35px;
      height: 35px;
    }

    .social-icon {
      width: 18px;
      height: 18px;
    }

    .contact-links {
      align-items: center;
    }

    .contact-link {
      justify-content: center;
    }
  }

  @media (max-width: 480px) {
    footer {
      padding: 1.5rem 0;
    }

    .footer-container {
      padding: 0 1rem;
    }

    .footer-content {
      gap: 1rem;
    }

    .footer-section-title {
      font-size: 0.95rem;
    }

    .social-links {
      gap: 0.5rem;
    }

    .contact-link {
      flex-direction: column;
      text-align: center;
      gap: 0.5rem;
      padding: 0.75rem 1rem;
    }

    .contact-text {
      font-size: 0.85rem;
    }

    .brand-text {
      font-size: 1rem;
      
    }

    .copyright {
      font-size: 0.8rem;
    }
  }


    /* ===== RESPONSIVE ===== */
    @media (max-width: 640px) {
      .container {
        padding: var(--spacing-md);
      }
      
      .header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
      }
      
      .header-left {
        width: 100%;
      }
      
      .btn-connect {
        align-self: flex-start;
      }
      
      .card {
        padding: var(--spacing-lg);
      }
      
      .form-row.dual,
      .form-row.triple {
        grid-template-columns: 1fr;
      }
    }