body {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.downloadLink {
    background: #000000;
    padding: 10px 20px;
    color: #fff;
    position: absolute;
    bottom: 10px;
    left: 10px;
    text-decoration: none;
    font-family: Arial;
    z-index: 99999;
}

#map {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}