body {
    margin: 0 auto;
    text-align: center;
    color: white;
    background: black;
}

#content {
    margin-top: 50px;
}

.side-panel {
    position:absolute;
    width: 200px;
    left: 20px;
    border: 2px solid blue;
}

#play-button {
    background-color: blue;
    color: white;
    padding: 15px 30px;
    border: none;
}