.transaction-card {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    overflow: hidden;
  }
  
  .transaction-card-header {
    background-color: #f5f7fa;
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
  }
  
  .transaction-card-header h3 {
    margin: 0;
    color: #333;
    font-size: 1.1rem;
  }
  
  .transaction-card-body {
    padding: 20px;
  }
  
  .transaction-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
  }
  
  .form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
  }
  
  .form-group label {
    font-size: 0.9rem;
    color: #555;
    font-weight: 500;
  }
  
  .form-group input {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.95rem;
  }
  
  .form-group input:focus {
    outline: none;
    border-color: #9945FF;
    box-shadow: 0 0 0 2px rgba(153, 69, 255, 0.1);
  }
  
  .transaction-error {
    color: #d73a49;
    font-size: 0.9rem;
    padding: 5px 0;
  }
  
  .transaction-result {
    background-color: #f5f7fa;
    padding: 10px;
    border-radius: 5px;
    font-size: 0.9rem;
  }
  
  .tx-signature {
    font-family: monospace;
    word-break: break-all;
    display: block;
    background-color: #f0f0f0;
    padding: 5px;
    border-radius: 3px;
    margin-top: 3px;
  }
  
  .tx-status {
    font-weight: 500;
  }
  
  .tx-status-pending {
    color: #e36209;
  }
  
  .tx-status-confirmed {
    color: #0366d6;
  }
  
  .tx-status-finalized {
    color: #28a745;
  }
  
  .tx-status-failed {
    color: #d73a49;
  }
  
  .button-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
  }

  .send-button {
    background-color: #9945FF;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background-color 0.2s;
  }

  .send-button:hover:not(:disabled) {
    background-color: #8a3deb;
  }

  .send-button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
  }

  .kit-button {
    background-color: #14F195;
    color: #000;
  }

  .kit-button:hover:not(:disabled) {
    background-color: #00d084;
  }
  
  .transaction-card-message {
    color: #666;
    font-style: italic;
    text-align: center;
    padding: 20px 0;
  }

  /* New styles for enhanced dual architecture demo */
  .architecture-log {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    padding: 12px;
    margin: 16px 0;
    max-height: 200px;
    overflow-y: auto;
  }

  .log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
  }

  .log-header h5 {
    margin: 0;
    color: #2d3748;
    font-size: 0.9rem;
  }

  .clear-log-button {
    background: #e53e3e;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.8rem;
    cursor: pointer;
  }

  .clear-log-button:hover {
    background: #c53030;
  }

  .log-content {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.4;
  }

  .log-entry {
    color: #4a5568;
    margin-bottom: 2px;
    padding: 2px 0;
  }

  .button-section {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 12px;
  }

  .button-section h5 {
    margin: 0 0 8px 0;
    color: #2d3748;
    font-size: 0.9rem;
  }

  .button-section:first-child {
    background: linear-gradient(135deg, #ebf8ff 0%, #f7fafc 100%);
    border-color: #bee3f8;
  }

  .button-section:last-child {
    background: linear-gradient(135deg, #f0fff4 0%, #f7fafc 100%);
    border-color: #9ae6b4;
  }

  .new-method-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
  }

  .new-method-button:hover:not(:disabled) {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
  }

  .kit-pure-button {
    background: linear-gradient(135deg, #38b2ac 0%, #319795 100%);
    color: white;
  }

  .kit-pure-button:hover:not(:disabled) {
    background: linear-gradient(135deg, #319795 0%, #2c7a7b 100%);
  }

  .architecture-info {
    background: linear-gradient(135deg, #fed7d7 0%, #fbb6ce 100%);
    border: 1px solid #feb2b2;
    border-radius: 6px;
    padding: 12px;
    margin-top: 16px;
    text-align: center;
  }

  .architecture-info p {
    margin: 4px 0;
    font-size: 0.9rem;
    color: #742a2a;
  }

  .architecture-info strong {
    color: #c53030;
  }