:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666666;
  --accent: #1c5d99;
  --rule: #e5e5e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --fg: #ededed;
    --muted: #9a9a9a;
    --accent: #79b8ff;
    --rule: #2c2c2c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  max-width: 42rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

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

/* Header / nav ------------------------------------------------------------ */

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

.brand {
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding: 0.25rem 0;
  text-decoration: none;
}

.nav-list a:hover,
.nav-list a:focus {
  text-decoration: underline;
}

/* Content ---------------------------------------------------------------- */

main {
  padding: 2.5rem 0;
}

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

footer {
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.875rem;
}

footer p {
  margin: 0;
}