:root {
  --bg: #0f1116;
  --panel: #161a22;
  --fg: #e8eaf0;
  --muted: #9aa3b2;
  --accent: #6aa8ff;
  --line: #242a36;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --panel: #ffffff;
    --fg: #1a1d23;
    --muted: #5b6472;
    --accent: #1f6feb;
    --line: #e3e6ec;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0 auto;
  max-width: 46rem;
  padding: 2.5rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

header {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0 0 0.4rem;
  font-size: 1.55rem;
  line-height: 1.3;
}

h2 {
  margin: 2.2rem 0 0.6rem;
  font-size: 1.15rem;
}

.lede {
  margin: 0 0 0.6rem;
  color: var(--muted);
}

.links a {
  margin-right: 0.9rem;
  font-size: 0.92rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

pre {
  padding: 0.85rem 1rem;
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

li {
  margin: 0.35rem 0;
}

dt {
  font-weight: 600;
  margin-top: 0.9rem;
}

dd {
  margin: 0.15rem 0 0;
  color: var(--muted);
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}