body {
    font-family: Arial, sans-serif;
    text-align: center;
    padding: 10px;
}

h2 {
    color: gray;
    font-weight: medium;
}
  
textarea {
    width: 100%;
    resize: none;
}
  
pre {
    background-color: #f0f0f0;
    padding: 1rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    text-align: left;
    padding: 30px;
}
  
.invalid-json {
    color: red;
}