body {
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
}

#display {
  font-size: 3rem;
  margin: 20px 0;
}

button {
  margin: 5px;
  padding: 10px 20px;
  border: none;
  background: #3b82f6;
  color: white;
  cursor: pointer;
  border-radius: 5px;
}

button:hover {
  background: #2563eb;
}

#laps {
  margin-top: 20px;
  list-style: none;
  padding: 0;
}