app-router {
    display: block;
    height: 100%;
    width: 100%;
}

app-router > * {
    height: 100%;
    width: 100%;
    box-sizing: border-box;
    position: relative;
    display: block;
}

app-router > *[data-role="null"] [data-role]:not([data-role*="null"]) {
    display: none;
}