styles.css

@import "./button-help.css";
.bd-example {
    position: relative;
    padding: 1rem;
    margin: 1rem -.75rem 0;
    border: solid #dee2e6;
    border-width: 1px 0 0;
}

.col,
.row>[class^="col-"] {
    padding-top: .75rem;
    padding-bottom: .75rem;
    background-color: rgba(39, 41, 43, 0.03);
    border: 1px solid rgba(39, 41, 43, 0.1);
}

#grid-show-system [class^="col-"] {
    text-align: center;
}

html,
body {
    height: 100%;
}

.app-container {
    height: 100%;
    padding: 5%;
}

.row {
    border: solid #dee2e6;
}

.button-container {
    margin: 20px auto;
    text-align: center;
}

.selectedRow {
    border: solid black 5px !important;
}

h1 {
    text-align: center;
}

.contextual-menu {
    position: absolute;
    display: none;
    z-index: 5;
}