body {
    background-color: #000 !important;
    background-position: center center !important;
    background-size: cover !important;
    background-repeat: no-repeat !important;
}
div.cover-container {
    height: 100vh !important;

    text-shadow: 0 .05rem .1rem rgba(0, 0, 0, .5);
    box-shadow: inset 0 0 5rem rgba(0, 0, 0, .5);

}
div.cover-container > div {
    max-width: 42em;
}
button.share-btn {
    color: #000000;
    background: -webkit-linear-gradient(top, #66ff66, #66ff33, #66ff00);
    box-shadow: 0px 0px 8px #00000042;
    border: none;
}