* {
    font-family: Verdana, Lucida Sans, Arial, Helvetica, sans-serif;
}

body {
    margin: 0px auto;
    background-color: #222;
    text-align: center;
}

#content-speed {
    margin: auto;
    font-size: 2.5em;
    color: black;
    width: 50%;
    background-color: white;
}

#content-speed-unit {
    font-size: 1.5em;
}

#content-settings {
    font-size: 1em;
    text-decoration: underline;
}

p {
    margin: 0px auto;
}

input[type=range] {
    margin: auto;
    width: 60%;
}

.content-interval-value {
    font-size: 0.5em;
    font-weight: bold;
}