body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f0f2f5;
}

.container {
  text-align: center;
  padding: 2rem;
  background: white;
  border-radius: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  width: 90%;
  max-width: 320px;
}

h1 {
  font-size: 1.5rem;
  color: #333;
  margin: 0;
}

.subtitle {
  color: #666;
  font-size: 0.9rem;
  margin: 0.5rem 0 1.5rem;
}

.timer {
  font-size: 4rem;
  font-weight: bold;
  margin: 1.5rem 0;
  color: #333;
}

#status {
  color: #666;
  font-size: 1.2rem;
  margin: 1rem 0 1.5rem;
}

.buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

button {
  padding: 0.75rem;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  color: white;
  font-size: 1rem;
  width: 180px;
}

#startBtn {
  background: #4caf50;
}
#pauseBtn {
  background: #ffc107;
}
#resetBtn {
  background: #f44336;
}

.footer {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: #666;
}

.footer a {
  color: #4caf50;
  text-decoration: none;
}