body {
  font-family: 'Segoe UI', sans-serif;
  background: #f4f4f4;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  background: white;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

#display {
  font-size: 3rem;
  margin: 1rem 0;
  font-weight: bold;
}

.buttons button {
  padding: 0.5rem 1rem;
  margin: 0.5rem;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  background-color: #154d8a;
  color: white;
  cursor: pointer;
  transition: 0.3s ease;
}

.buttons button:hover {
  background-color: #0056b3;
}

#laps {
  list-style-type: none;
  margin-top: 1rem;
  padding: 0;
  max-height: 150px;
  overflow-y: auto;
}

#laps li {
  background: #eaeaea;
  margin: 0.3rem;
  padding: 0.5rem;
  border-radius: 5px;
}