:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1d1f24;
  --muted: #5b6270;
  --link: #0b5fd1;
  --border: #e3e6eb;
  --card: #f6f7f9;
  --max: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e8eaee;
    --muted: #a3aab6;
    --link: #7fb3ff;
    --border: #2b2f36;
    --card: #1c1f25;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  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, main, footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1rem;
}

header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: 0.01em;
}

nav a {
  margin-right: 1rem;
  color: var(--muted);
  text-decoration: none;
}

nav a:last-child { margin-right: 0; }

nav a:hover, nav a[aria-current="page"] { color: var(--link); }

main { padding-top: 2rem; padding-bottom: 3rem; }

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 0.5rem; }
h2 { font-size: 1.375rem; line-height: 1.3; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.125rem; margin: 1.5rem 0 0.25rem; }

p, ul, ol { margin: 0 0 1rem; }
li { margin-bottom: 0.25rem; }

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

.meta { color: var(--muted); font-size: 0.9375rem; margin-bottom: 1.5rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}

.card h3 { margin-top: 0; }

.tag {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0 0.6rem;
  margin-left: 0.5rem;
  vertical-align: middle;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9375em;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0.05rem 0.3rem;
}

table { border-collapse: collapse; width: 100%; margin: 0 0 1rem; font-size: 0.9375rem; }
th, td { text-align: left; vertical-align: top; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }

footer {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  padding-bottom: 2rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

footer a { color: var(--muted); }

@media (max-width: 480px) {
  body { font-size: 1rem; }
  h1 { font-size: 1.625rem; }
  th, td { padding: 0.4rem; }
}

.footnotes { font-size: 0.9375rem; color: var(--muted); padding-left: 1.25rem; }
sup { line-height: 0; }