body {
    background-color: #f5f5f5;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: 500px;
    margin: 20px auto;
    padding: 20px;
    background-color: #ffffff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  }
  
  h1 {
    text-align: center;
    color: #333333;
  }
  
  input[type="file"] {
    display: block;
    margin: 20px auto;
  }
  
  button {
    display: block;
    margin: 0 auto;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
  }
  
  button:hover {
    background-color: #45a049;
  }
  
  .preview-container {
    text-align: center;
    margin-top: 20px;
  }
  
  #preview {
    max-width: 100%;
    height: auto;
  }
  
  #downloadLink {
    display: block;
    margin-top: 20px;
    text-align: center;
    color: #4CAF50;
    text-decoration: none;
  }
  
  #downloadLink:hover {
    text-decoration: underline;
  }