body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 1em;
    text-align: center;
}

section {
    padding: 20px;
    text-align: center;
}

textarea {
    width: 100%;
    height: 300px;
    padding: 10px;
    font-family: monospace;
    background-color: #f9f9f9;
    border: 1px solid #ccc;
    resize: none;
}

button {
    padding: 10px 20px;
    margin-top: 10px;
    cursor: pointer;
}