body {
    background:black;
    color:white;
    margin: 20px;
    width: 95%;
}

header {
    font-size: 30px;
    text-align: center;
}

.footer {
    border-top: solid 3px grey;
    position: absolute;
    bottom:0;
    height: 80px;
    width: 95%;
    padding: 15px;
}

audio {
    float:left;
}