body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

header {
  padding: 2rem;
  background: #020617;
}

nav {
  padding: 1rem;
  background: #020617;
}

nav a {
  margin-right: 1rem;
  color: #38bdf8;
  text-decoration: none;
}

nav a.active {
  text-decoration: underline;
}

main {
  padding: 2rem;
}

footer {
  padding: 1rem;
  text-align: center;
  opacity: 0.6;
}