:root {
  color-scheme: light dark;
  --bg: #f6f4f0;
  --fg: #1c1917;
  --muted: #57534e;
  --rule: #d6d3d1;
  --link: #1d4ed8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161412;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --rule: #44403c;
    --link: #93c5fd;
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.55;
}

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

header,
main,
footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

header {
  padding-top: 1.5rem;
}

header a {
  text-decoration: none;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.2;
  margin: 0.35rem 0 0.75rem;
}

h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.6rem;
}

h3 {
  font-size: 1.02rem;
  margin: 1.4rem 0 0.45rem;
}

p,
li {
  color: var(--fg);
}

.muted,
footer,
.meta {
  color: var(--muted);
}

.meta {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

nav.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 1.25rem 0 2rem;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2rem 0;
}

footer {
  padding: 1.5rem 1.25rem 2.5rem;
  font-size: 0.92rem;
}

.card {
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin: 0.85rem 0;
}

.card h2 {
  margin-top: 0;
}