body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #121212;
  color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  text-align: center;
}

.container {
  max-width: 600px;
}

h1 {
  font-size: 3rem;
  margin-bottom: 10px;
}

#countdown {
  font-size: 2rem;
  margin-top: 20px;
  font-weight: bold;
  letter-spacing: 1px;
}