:root {
  --text: #222222;
  --muted: #666666;
  --accent: #1e9fe2;
  --bg: #ffffff;
  --code-bg: #f2f2f2;
  --border: #eaeaea;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.65;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

header.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
}

nav.site-nav a {
  color: var(--text);
  text-decoration: none;
  margin-left: 24px;
  font-size: 16px;
}

nav.site-nav a:first-child { margin-left: 0; }

nav.site-nav a:hover { color: var(--accent); }

main {
  padding: 48px 0 64px;
}

h1 {
  font-size: 38px;
  line-height: 1.25;
  margin: 0 0 20px;
}

h2 {
  font-size: 26px;
  margin: 40px 0 16px;
}

p { margin: 0 0 20px; }

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

ul { padding-left: 22px; }
li { margin-bottom: 8px; }

code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.rule {
  width: 60px;
  height: 4px;
  background: var(--accent);
  border: none;
  margin: 0 0 28px;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--muted);
  font-size: 15px;
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  h1 { font-size: 30px; }
  h2 { font-size: 22px; }
  nav.site-nav a { margin-left: 16px; font-size: 15px; }
}