style.css

/**
 * @license
 * Copyright 2019 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */
/* [START maps_hiding_features] */
/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
#map {
  height: 100%;
}

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

.map-control {
  background-color: #fff;
  border: 1px solid #ccc;
  box-shadow: 0 2px 2px rgba(33, 33, 33, 0.4);
  font-family: "Roboto", "sans-serif";
  margin: 10px;
  padding-right: 5px;
  /* Hide the control initially, to prevent it from appearing
           before the map loads. */
  display: none;
}

/* Display the control once it is inside the map. */
#map .map-control {
  display: block;
}

.selector-control {
  font-size: 14px;
  line-height: 30px;
  vertical-align: baseline;
}

/* [END maps_hiding_features] */