body {
    padding: 0;
    margin: 0;
}
html, body, #map {
    height: 100%;
    width: 100vw;
}

#instruction {
  position: absolute;
  top: 10px;
  left: 60px;
  right: 60px;
  background-color: #FFF;
  z-index: 999999999;
  text-align: center;
  padding: 5px;
}