body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #0f1012;
  color: white;
}
.site-header {
  padding: 1rem;
  background: #15171a;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav a {
  margin-left: 1rem;
  color: #6ee7ff;
}
section {
  padding: 2rem;
}
footer {
  text-align: center;
  padding: 1rem;
  background: #15171a;
  color: #aaa;
}