/* 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;
      }
      
      .custom-map-control-button {
        background-color: #fff;
        border: 0;
        border-radius: 2px;
        box-shadow: 0 1px 4px -1px rgba(0, 0, 0, 0.3);
        margin: 10px;
        padding: 0 0.5em;
        font: 400 18px Roboto, Arial, sans-serif;
        overflow: hidden;
        height: 40px;
        cursor: pointer;
      }
      .custom-map-control-button:hover {
        background: #ebebeb;
      }