#dialog {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.8);
    padding: 1em;
    border-radius: 5px;
}

.a-enter-vr {
    display: none;
}

.a-enter-ar {
    display: none;
}