:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --rule: #e4e4e7;
  --accent: #1a9c4c;
  --card: #f7f7f8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131316;
    --fg: #ececee;
    --muted: #9a9aa0;
    --rule: #2c2c31;
    --accent: #34d06f;
    --card: #1b1b1f;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 3rem 1.25rem 5rem;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
        "Apple SD Gothic Neo", "Hiragino Sans", sans-serif;
}

main { max-width: 44rem; margin: 0 auto; }

h1 {
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
}

.sub { color: var(--muted); margin: 0 0 2.5rem; font-size: 0.95rem; }

h2 {
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  margin: 2.75rem 0 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

h2:first-of-type { border-top: none; padding-top: 0; }

p { margin: 0 0 1rem; }

ul { margin: 0 0 1rem; padding-left: 1.25rem; }

li { margin-bottom: 0.4rem; }

strong { font-weight: 600; }

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

.lede {
  background: var(--card);
  border-radius: 12px;
  padding: 1.25rem 1.4rem;
  margin: 0 0 2.5rem;
}

.lede p:last-child { margin-bottom: 0; }

.langs {
  margin: 0 0 2.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.langs a { margin-right: 0.85rem; }

footer {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}

code {
  background: var(--card);
  padding: 0.1em 0.4em;
  border-radius: 5px;
  font-size: 0.9em;
}