html,
body {
    margin: 0;
    padding: 0;
}

body {
    font: 10px/1 Helvetica, Free-sans, Arial, Sans-serif;
    text-align: center;
    padding: 100px 0;
    color: #fff;
    background: #000;
}

#meter {
    width: 702px;
    height: 152px;
    margin: 0 auto;
}

#dial {
    width: 736px;
    height: 50px;
    margin: 0 auto;
    position: relative;
}

#slider {
    width: 40px;
    height: 100px;
    position: absolute;
    left: 48%;
}