:host {
    display: flex;
    flex-direction: column;
    padding: 2px 0;
}
div#ui {
    display: inline-block;
    width: 30em;
    border: 1px solid gray;
    background: #BFBFBF;
    color: black;
}
#ui button { width: 2em; }
div#graphView {

}
div a { color: #007; }
.expander {
    display: inline-block;
    padding: 3px;
}