html, body {
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 20px;
    font-family: Arial, sans-serif;
}

#controls {
    margin-bottom: 20px;
}

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

#result {
    padding: 20px;
    border: 1px solid #ccc;
    margin-top: 20px;
}