html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

#compose-app {
    width: 100%;
    height: 100%;
}

#compose-app + svg {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#compose-app:not(:empty) + svg {
    display: none;
}