html, body {
    height: 100%;
    padding: 0;
    margin: 0;
  }
  #map {
    /* configure the size of the map */
    position: absolute;
    left: 0;
    top: 0;
    z-index: 1;
    width: 50%;
    height: 100%;
  }
  #container {
      position:absolute;
      right: 0px;
      height: 100%;
      margin: 0 auto 0 auto;
      width: 50%;
    }
  #controls {
    position: absolute;
    z-index: 10000;
    top: 20px;
    width: 100%;
    text-align: center;
  }
  #controls span {
    padding: 0px 10px;
    cursor: pointer;
    text-align: center;
    display: inline-block;
    background-color: #2d697b;
    border: 2px solid #cccccc;
    text-transform: uppercase;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: white;
    font-weight: bold;
    border-radius: 20px;
    line-height: 36px;
    text-align: center;
  }

  @media only screen and (max-width: 768px) {
    /* For mobile phones: */
    #map {
      width: 100%;
      height: 50%;
    }
    #container {
        width: 100%;
        height: 50%;
        top: 50%;
    }
}