.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    transition: box-shadow 0.3s ease;
  }
  
  .card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  }
  
  .stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
  }
  
  .stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    display: block;
    margin-top: 0.25rem;
  }
  
  .stat-label {
    font-size: 0.75rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  
  .btn {
    transition: all 0.2s ease;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
  }
  
  .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  }
  
  .btn:active {
    transform: translateY(0);
  }
  
  .section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 1.1rem;
    color: #374151;
    cursor: pointer;
    user-select: none;
  }
  
  .section-header:hover {
    color: #667eea;
  }
  
  .section-icon {
    display: inline-block;
    transition: transform 0.3s ease;
  }
  
  .collapsible-content {
    max-height: 500px;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  
  .collapsible-content.collapsed {
    max-height: 0;
  }
  
  .toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #10b981;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    animation: slideIn 0.3s ease;
  }
  
  @keyframes slideIn {
    from {
      transform: translateX(400px);
      opacity: 0;
    }
    to {
      transform: translateX(0);
      opacity: 1;
    }
  }
  
  .textarea-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #374151;
    display: block;
  }
  
  textarea {
    transition: border-color 0.2s ease;
    font-family: monospace;
  }
  
  textarea:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  }
  
  .icon {
    width: 18px;
    height: 18px;
  }
  
  .sticky-header {
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  /* Mobile responsive adjustments */
  @media (max-width: 768px) {
    .stat-value {
      font-size: 1.25rem;
    }
    
    .stat-label {
      font-size: 0.65rem;
    }
    
    .btn {
      width: 100%;
      justify-content: center;
    }
    
    .card {
      padding: 1rem;
    }
    
    textarea {
      height: 250px !important;
    }
  }
  
  /* Visitor Counter Styles */
  .visitor-counter-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    color: white;
  }
  
  .visitor-icon {
    font-size: 1.5rem;
  }
  
  .visitor-label {
    font-size: 0.875rem;
    font-weight: 600;
    opacity: 0.9;
  }
  
  .visitor-count {
    font-size: 1.25rem;
    font-weight: bold;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    min-width: 60px;
    text-align: center;
  }
  
  /* Tab Navigation Styles */
  .tab-navigation {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
  }
  
  .tab-btn {
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 600;
    color: #6b7280;
    transition: all 0.2s ease;
    border-radius: 8px 8px 0 0;
    font-size: 0.95rem;
  }
  
  .tab-btn:hover {
    background: #f3f4f6;
    color: #374151;
  }
  
  .tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
    background: #f9fafb;
  }
  
  .tab-content-wrapper {
    min-height: 200px;
  }
  
  .tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
  }
  
  .tab-content.active {
    display: block;
  }
  
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Mobile tab adjustments */
  @media (max-width: 768px) {
    .tab-btn {
      padding: 0.5rem 0.75rem;
      font-size: 0.85rem;
    }
  }
  .card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    transition: box-shadow 0.3s ease;
  }
  
  .card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  }
  
  .stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
  }
  
  .stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    display: block;
    margin-top: 0.25rem;
  }
  
  .stat-label {
    font-size: 0.75rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  
  .btn {
    transition: all 0.2s ease;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
  }
  
  .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  }
  
  .btn:active {
    transform: translateY(0);
  }
  
  .section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 1.1rem;
    color: #374151;
    cursor: pointer;
    user-select: none;
  }
  
  .section-header:hover {
    color: #667eea;
  }
  
  .section-icon {
    display: inline-block;
    transition: transform 0.3s ease;
  }
  
  .collapsible-content {
    max-height: 500px;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  
  .collapsible-content.collapsed {
    max-height: 0;
  }
  
  .toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #10b981;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    animation: slideIn 0.3s ease;
  }
  
  @keyframes slideIn {
    from {
      transform: translateX(400px);
      opacity: 0;
    }
    to {
      transform: translateX(0);
      opacity: 1;
    }
  }
  
  .textarea-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #374151;
    display: block;
  }
  
  textarea {
    transition: border-color 0.2s ease;
    font-family: monospace;
  }
  
  textarea:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  }
  
  .icon {
    width: 18px;
    height: 18px;
  }
  
  .sticky-header {
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  /* Main Navigation Styles */
  .main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 0.75rem;
  }
  
  .nav-item {
    padding: 0.625rem 1.25rem;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid transparent;
    border-radius: 8px;
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .nav-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
  }
  
  .nav-item.active {
    background: white;
    color: #667eea;
    border-color: white;
  }
  
  /* Mobile responsive adjustments */
  @media (max-width: 768px) {
    .stat-value {
      font-size: 1.25rem;
    }
    
    .stat-label {
      font-size: 0.65rem;
    }
    
    .btn {
      width: 100%;
      justify-content: center;
    }
    
    .card {
      padding: 1rem;
    }
    
    textarea {
      height: 250px !important;
    }
  
    .nav-item {
      flex: 1 1 auto;
      justify-content: center;
      font-size: 0.875rem;
      padding: 0.5rem 0.75rem;
    }
  }
  
  /* Visitor Counter Styles */
  .visitor-counter-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    color: white;
  }
  
  .visitor-icon {
    font-size: 1.5rem;
  }
  
  .visitor-label {
    font-size: 0.875rem;
    font-weight: 600;
    opacity: 0.9;
  }
  
  .visitor-count {
    font-size: 1.25rem;
    font-weight: bold;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    min-width: 60px;
    text-align: center;
  }
  
  /* Tab Navigation Styles */
  .tab-navigation {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
  }
  
  .tab-btn {
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 600;
    color: #6b7280;
    transition: all 0.2s ease;
    border-radius: 8px 8px 0 0;
    font-size: 0.95rem;
  }
  
  .tab-btn:hover {
    background: #f3f4f6;
    color: #374151;
  }
  
  .tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
    background: #f9fafb;
  }
  
  .tab-content-wrapper {
    min-height: 200px;
  }
  
  .tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
  }
  
  .tab-content.active {
    display: block;
  }
  
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Mobile tab adjustments */
  @media (max-width: 768px) {
    .tab-btn {
      padding: 0.5rem 0.75rem;
      font-size: 0.85rem;
    }
  }