body {
  font-family: Arial, sans-serif;
  text-align: center;
  padding: 50px;
  background-color: #f0f0f0;
  color: #333;
  transition: background-color 0.3s, color 0.3s;
}

body.dark {
  background-color: #333;
  color: #f0f0f0;
}

.container {
  max-width: 400px;
  margin: auto;
  padding: 20px;
  border-radius: 10px;
  background-color: #fff;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

body.dark .container {
  background-color: #444;
}

.counter-display {
  font-size: 4rem;
  margin: 20px 0;
}

.buttons button {
  font-size: 1.2rem;
  margin: 5px;
  padding: 10px 20px;
  cursor: pointer;
}

.theme-toggle {
  margin-top: 20px;
}

.instructions {
  margin-top: 15px;
  font-size: 0.9rem;
  color: gray;
}