body {
    text-align: center;
    font-family: Sans-serif;
    margin: 0;
}

.axis .domain, .axis .tick line {
    stroke-width: 2px;
    stroke: DarkSlateGrey;
}

.axis .tick text {
    font-size: 15px;
}

.needle {
    fill: red;
}

.label {
    fill: #AAA;
    font-size: 18px;
}