html, body {
      height: 100%;
      margin: auto;
    }
    .center {
      margin: auto;
      width: 60%;
      border: 2px solid Azure;
      padding: 10px;
    }
    .leaflet-container {
      height: 480px;
      width: 720px;
      max-width: 100%;
      max-height: 100%;
      /*display: inline-block;*/
    }