:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c2430;
  --muted: #5a6575;
  --accent: #0b5cad;
  --rule: #d9dee5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11161d;
    --fg: #e6eaf0;
    --muted: #9aa5b4;
    --accent: #6cb2f2;
    --rule: #2a323d;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
  max-width: 44rem;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--rule);
}

.brand {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand a {
  color: inherit;
  text-decoration: none;
}

nav a {
  font-size: 0.9375rem;
}

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

main {
  padding: 1.5rem 0;
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.75rem;
  line-height: 1.25;
}

h2 {
  margin: 2rem 0 0.5rem;
  font-size: 1.2rem;
  line-height: 1.3;
}

p,
ul {
  margin: 0 0 1rem;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.4rem;
}

.meta {
  color: var(--muted);
  font-size: 0.9375rem;
}

footer {
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}

footer p {
  margin: 0 0 0.35rem;
}

@media (min-width: 40rem) {
  body {
    padding-top: 2rem;
  }

  h1 {
    font-size: 2.125rem;
  }
}