body {
    background-color: #111;
    color: #eee;
    font-family: sans-serif;
    text-align: center;
    margin: 0;
    overflow: hidden;
}

h1 {
    font-size: 2rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
}

.controls {
    margin-bottom: 1rem;
}

.controls label {
    margin-right: 0.5rem;
}

.controls span {
    margin-left: 0.5rem;
    min-width: 30px;
    display: inline-block;
    text-align: left;
}