body {
    font-family: sans-serif;
    margin: 0;
    background-color: #f8f9fa;
  }
  
  .container {
    background-color: #fff;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  }
  
  h1 {
    font-weight: 600;
  }
  
  h2 {
    margin-top: 10px;
    font-weight: 500;
  }
  
  .form-group label {
    font-weight: 500;
  }
  
  #keyboardMapping {
    border: 1px solid #ced4da; /* Light border */
    padding: 15px;
    margin-top: 15px;
    border-radius: 5px;
  }
  
  #keyboardMapping ul {
    margin-bottom: 0; /* Remove default list margin */
  }
  
  #waveform {
    width: 100%;
    height: 200px; /* Increased height */
  }