:root {
  color-scheme: light;
  --background: #ffffff;
  --text: #111111;
  --muted: #555555;
  --border: #dddddd;
  --link: #0645ad;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 20px;
}

header {
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
  padding-bottom: 24px;
}

h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  margin: 0 0 8px;
}

h2 {
  font-size: 1.25rem;
  margin-top: 32px;
}

p,
li {
  font-size: 1rem;
}

.muted {
  color: var(--muted);
}

a {
  color: var(--link);
}

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 40px;
  padding-top: 20px;
}