.ol-gauge {
  top: 0.5em;
  left: 50%;
  -webkit-transform: translateX(-50%);
  transform: translateX(-50%);
  background-color: rgba(255,255,255,.5);
  padding: 0.1em 0.5em;
}

.ol-gauge > * {
  display: inline-block;
  vertical-align: middle;
}
.ol-gauge > span {
  margin: 0 0.5em 0 0;
}
.ol-gauge > div {
  display: inline-block;
  width: 200px;
  border: 1px solid rgba(0,60,136,.5);
  border-radius: 3px;
  padding:1px;
}
.ol-gauge button {
  height: 0.8em;
  margin:0;
  max-width:100%;
}