body {
  min-height: 100vh;
  margin: 0;
  padding: 0;
  padding-top: 3rem;
  font-family: system-ui, Arial, sans-serif;
  text-decoration: none;
}

a {
  color: black;
}

header,
footer {
  background: #f5f5f7;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1rem;
  display: flex;
}

header a {
  margin: 0 1rem;
}

main {
  padding: 1rem;
  max-width: 800px;
}

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

@media (prefers-color-scheme: dark) {
  body,
  header a,
  a {
    color: white;
  }

  body {
    background: black;
  }

  header,
  footer {
    background: #1d1d1f;
  }
}