:root {
  --text: #1c1f3b;
  --muted: #5b6178;
  --border: #e3e6f0;
  --accent: #0073ea;
  --bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8eaf2;
    --muted: #a3a8bd;
    --border: #2c3050;
    --accent: #5aa9ff;
    --bg: #14162b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0 20px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 0 80px;
}

header {
  padding-bottom: 28px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

nav {
  margin-top: 10px;
  font-size: 15px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-right: 18px;
}

nav a:hover {
  color: var(--accent);
  text-decoration: underline;
}

h1 {
  font-size: 30px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

h2 {
  font-size: 19px;
  margin: 36px 0 10px;
  letter-spacing: -0.01em;
}

.lede {
  font-size: 19px;
  color: var(--muted);
  margin-top: 0;
}

.updated {
  font-size: 14px;
  color: var(--muted);
}

ul {
  padding-left: 22px;
}

li {
  margin-bottom: 8px;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(128, 138, 170, 0.16);
}

.callout {
  padding: 16px 20px;
  margin: 24px 0;
  border-left: 3px solid var(--accent);
  background: rgba(0, 115, 234, 0.06);
  border-radius: 0 6px 6px 0;
}

footer {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--muted);
}