.leaflet-control-velocity {
  background-color: rgba(222, 222, 222, 0.7);
  padding: 0 5px;
  margin: 0 !important;
  color: #333;
  font: 1.5rem "Helvetica Neue", Arial, Helvetica, sans-serif;
  text-align: left;
}

.velocity-overlay {
  position: absolute;
  z-index: 1;
}

@media only screen and (max-width: 800px) {
  .leaflet-control-velocity {
    font-size: 1.3rem;
  }
}

@media only screen and (max-width: 420px) {
  .leaflet-control-velocity {
    font-size: 1.2rem;
  }
}