html body {
    font-family: Arial, sans-serif;
    margin: 20px;
    padding: 0;
    display: flex;
    justify-content: center;
    font-size: 2rem;
    height: 100vh;
    background-color: #f0f0f0;
}

#controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

button {
    padding: 5px 10px;
    margin: 0 5px;
}

input {
    width: 50px;
}