body {
  font-family: Helvetica, Arial, sans-serif;
  padding: 20px;
}

.counter {
  text-align: center;
  width: 200px;
  height: 200px;
  background-color: #afa;
  font-size: 100px;
  border-radius: 20px;
  line-height: 200px;
}

.toolbar {
  width: 200px;
  text-align: center;
}

.toolbar button {
  font-size: 20px;
  padding: 10px;
  width: 95px;
  margin-top: 5px;
  border-radius: 10px;
}