* {
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  padding: 24px 12px;
  background-color: #2c1d48;
  font-family: Arial, sans-serif;
}

.stopwatch {
  background-color: #6664a4;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.18);
  text-align: center;
  font-family: monospace;
  font-weight: bold;

  width: min(520px, 92%);
}

.stopwatch .display {
  font-size: clamp(36px, 8vw, 72px);
  margin-bottom: 18px;
}

.stopwatch .buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.stopwatch button {
  padding: 10px 18px;
  font-size: clamp(16px, 2.6vw, 22px);
  margin: 0;
  font-family: monospace;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.stopwatch button#start {
  background-color: #2b532d;
  color: white;
}
.stopwatch button#stop {
  background-color: #8d3a35;
  color: white;
}
.stopwatch button#reset {
  background-color: #145489;
  color: white;
}