body {
    margin: 0;
    overflow: hidden;
}

#container {
    position: absolute;
    width: 100%;
    height: 100%;
}

#ui {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 1;
    background-color: rgba(255, 255, 255, 0.7);
    padding: 10px;
    border-radius: 5px;
}

#ui > * {
    margin: 4px 0 0 0;
}