div.inputForm > .ui-panel-content {
    grid-template-columns: max-content max-content;
    grid-auto-rows: minmax(1.5em, auto);
    grid-template-areas:
            "l_username i_username"
            ". b_submit";
}


.l_username { grid-area: l_username; }
.i_username { grid-area: i_username; }

.b_submit { grid-area: b_submit; }