a.download{
    text-decoration: none;
    color: #fff;
    background: #FFF;
    padding: 8px 10px;
    border-radius: 3px;
    width: 120px;
    margin: 100px auto 0 auto;
    z-index: 100;
    transition: opacity .8s ease;
}

a.download.bottom{
    width: 100px;
    background: #b7d4ee;
    opacity: 0;
    margin-top: 0px;
}

a.download.bottom{
    border-radius: 0 0 3px 3px;
}