body {
  margin: 0;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  font-family: Helvetica Neue;
}

#map {
  position: absolute;
  width: 100%;
  height: 100%;
}

svg {
  position: absolute;
  width: 100%;
  height: 100%;
}

.tooltip {
  position: absolute;
  padding: 10px;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-shadow: rgba(0, 0, 0, 0.16) 0px 1px 4px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -125%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}