.stopwatch {
  text-align: center;
}

.display {
  font-size: 4em;
  margin-bottom: 20px;
}

button {
  font-size: 1.5em;
  padding: 10px 20px;
  margin-right: 10px;
  background-color: #ccc;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #ddd;
}

.start {
  border: 2px solid #1111;
  border-radius: 5px;
  color: #111;
}

.stop {
  border: 2px solid #1111;
  border-radius: 5px;
  color: #222;
}

.reset {
  border: 2px solid #1111;
  border-radius: 5px;
  color: #333;
}