:root {
  --fg: #111;
  --fg-muted: #555;
  --bg: #fff;
  --accent: #0a5fff;
  --border: #e5e5e5;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial,
    sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

body {
  padding: 48px 24px 96px;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
}

header {
  max-width: var(--max-width);
  margin: 0 auto 32px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

header .brand {
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
}

header nav a {
  color: var(--fg-muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
}

header nav a:hover {
  color: var(--fg);
}

h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 16px 0 24px;
}

h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 12px;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 16px;
}

ul {
  padding-left: 24px;
  margin: 0 0 16px;
}

li {
  margin-bottom: 6px;
}

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

.lead {
  font-size: 18px;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

.meta {
  font-size: 13px;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

footer {
  max-width: var(--max-width);
  margin: 64px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--fg-muted);
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

footer a {
  color: var(--fg-muted);
  text-decoration: none;
  margin-left: 16px;
}

footer a:hover {
  color: var(--fg);
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f0f0f0;
    --fg-muted: #a0a0a0;
    --bg: #0e0e10;
    --border: #262626;
    --accent: #6aa3ff;
  }
}