* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.container {
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  font-size: 3rem;
}

.stopwatch {
  background: rgba(255, 255, 255, 0.05);
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

#display {
  font-size: 4rem;
  margin-bottom: 20px;
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  from {
    transform: scale(1);
    opacity: 1;
  }
  to {
    transform: scale(1.05);
    opacity: 0.9;
  }
}

.controls button {
  background: #00c6ff;
  border: none;
  margin: 5px;
  padding: 10px 20px;
  border-radius: 30px;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

.controls button:hover {
  background: #0072ff;
}

#laps {
  list-style: none;
  margin-top: 20px;
  max-height: 150px;
  overflow-y: auto;
  padding-right: 10px;
}

#laps li {
  background: rgba(255, 255, 255, 0.1);
  margin: 5px 0;
  padding: 8px;
  border-radius: 10px;
}