phadej/menrva

.container {
  width: 200px;
  box-sizing: border-box;
  padding: 5px;
  border: 1px solid #eee;
  text-align: center;
}
.container div {
  padding: 5px;
}
#counter {
  border-bottom: 1px solid #ccc;
  font-weight: bold;
  font-family: sans-serif;
  font-size: 20px;
}
button {
  background-color: #369;
  color: white;
  border: none;
  border-radius: 5px;
  font-size: 20px;
}
button:active {
  background-color: #69c;
}
button:disabled {
  background-color: #999;
}