:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --fg: #1a1d26;
  --muted: #5c6370;
  --border: #d8dce3;
  --card: #fff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141a;
    --fg: #e8eaef;
    --muted: #9aa3b2;
    --border: #2a303c;
    --card: #1a1d26;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
}
main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3rem;
}
header {
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}
h1 {
  font-size: 1.65rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}
.meta {
  color: var(--muted);
  font-size: 0.9rem;
}
h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.75rem;
  font-weight: 650;
}
h3 {
  font-size: 1rem;
  margin: 1.35rem 0 0.5rem;
  font-weight: 600;
}
p,
ul {
  margin: 0.5rem 0;
}
ul {
  padding-left: 1.25rem;
}
li {
  margin: 0.35rem 0;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.15rem;
  margin: 1rem 0;
}
.note {
  font-size: 0.9rem;
  color: var(--muted);
}
code {
  font-size: 0.88em;
  padding: 0.12em 0.35em;
  border-radius: 4px;
  background: color-mix(in srgb, var(--border) 55%, transparent);
}
a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}
a:hover {
  text-decoration-thickness: 2px;
}