body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #1e1e1e;
  margin: 0;
  font-family: 'Courier New', Courier, monospace;
}

.clock {
  font-size: 5rem;
  color: #00ffcc;
  background: #000;
  padding: 20px 40px;
  border-radius: 10px;
  box-shadow: 0 0 20px #00ffcc;
}