body {
    color: #000;
    font-size: 16px;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.8;
    position: relative;
    text-align: center;
}

.headline {
    font-size: 1.5rem;
}

#gauge {
    width: 100%;
}

#valueTextfield {
    font-size: 1.2rem;
}

.button {
    font-size: 1.5rem;
    width: 45%;
}