body {
  background: #0f172a;
  color: #e5e7eb;
  font-family: Arial, sans-serif;
  text-align: center;
  padding-top: 50px;
}

#world {
  margin: 30px auto;
  padding: 20px;
  width: 60%;
  background: #1e293b;
  border-radius: 10px;
  font-size: 18px;
}