.leaflet-container {
  height: 100%;
  min-height: 60vh;
  width: 100%;
  min-width: 75vw;
  display: flex;
  margin: 30px auto;
}

@media only screen and (max-width: 400px) {
  .leaflet-container {
     height: 400px;
     width: 85vw;
  }
}