body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 1rem;
    background-color: #f0f0f0;
  }
  
  h1 {
    text-align: center;
  }
  
  .file-inputs {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
  }
  
  .panels {
    display: flex;
    width: 100%;
    height: 80vh;
    border-top: 1px solid #ccc;
  }
  
  .panel {
    flex: 1;
    overflow-y: auto;
    background: white;
    padding: 1rem;
    border-right: 1px solid #ccc;
  }
  
  .panel:last-child {
    border-right: none;
  }
  
  .node {
    padding: 0.25rem;
    margin: 0.1rem 0;
    border-radius: 4px;
    font-family: monospace;
  }
  
  .equal {
    background-color: #d4edda;
  }
  
  .different {
    background-color: #fff3cd;
  }
  
  .only-one {
    background-color: #f8d7da;
  }