:root {
  --fg: #111;
  --bg: #fefefe;
  --muted: #666;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  color: var(--fg);
  background: var(--bg);
}

header {
  background-color: var(--bg);
  padding: 1rem;
  border-bottom: 1px solid var(--muted);
}

main {
  min-height: 100vh;
  display: grid;
  place-content: center;
  text-align: center;
}

footer {
  text-align: center;
  padding: 1rem;
  background-color: var(--muted);
  color: var(--bg);
}

.navigation{
  display: flex;
  border: 1px black solid;
  gap: 1rem;
  justify-content: center;
}
.nav-link {
  text-decoration: none;
  color: var(--fg);
  padding: 0.5rem 1rem;
  border:1px black solid;
  border-radius: 0.25rem;
  transition: background-color 0.2s;
}

.nav-link:hover {
  background-color: var(--muted);
  color: var(--bg);
}