style.css

/*
 * @license
 * Copyright 2025 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */
/* [START maps_routes_route_matrix] */
/*
 * Always set the map height explicitly to define the size of the div element
 * that contains the map.
 */
/* Optional: Makes the sample page fill the window. */
html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

#container {
    height: 100%;
    display: flex;
}

#sidebar {
    flex-basis: 15rem;
    flex-grow: 1;
    padding: 1rem;
    max-width: 30rem;
    height: 100%;
    box-sizing: border-box;
    overflow: auto;
}

#map {
    flex-basis: 0;
    flex-grow: 4;
    height: 100%;
}

#sidebar {
    flex-direction: column;
}
/* [END maps_routes_route_matrix] */