body {
  font-family: 'Arial', sans-serif;
  background-color: #111;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.clock-container {
  text-align: center;
  background-color: #222;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px #444;
}

#clock {
  font-size: 3rem;
  margin-top: 20px;
  letter-spacing: 2px;
}