html, body {
    padding: 0;
    margin: 0;
}

#earth_div {
    top: 0;
    right: 0;
    bottom: 0;
    left: 0; 
    background-color: #000;
    position: absolute !important;
}

#buttons {
    position: absolute;
    top: 10px;
    left: 10px;
}