body {
    font-family: Arial, sans-serif;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px;
    margin: 0;
}

#app {
    max-width: 400px;
}

#output {
    margin-top: 10px;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 5px;
}