body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

#container {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 300px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

select {
    width: 100%;
    padding: 8px;
    margin: 10px 0;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
}

button:hover {
    background-color: #45a049;
}

pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}