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

h1 {
  color: #333;
}

#time-display {
  font-size: 3rem;
  font-weight: bold;
  background: white;
  padding: 30px 60px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}