body {
  font-family: Arial, sans-serif;
  background: #0b0c10;
  color: #fff;
  text-align: center;
  padding: 40px;
}
header {
  border-bottom: 2px solid #6D9651;
  padding-bottom: 20px;
}
footer {
  margin-top: 40px;
  font-size: 0.9em;
  color: #999;
}