:root {
  --bg: #fbfaf7;
  --fg: #1a1a1a;
  --muted: #666;
  --accent: #B07C3B;
  --border: #e6e3dc;
  --code-bg: #f3f1ec;
  --max-width: 1100px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  font-size: 16px;
}
.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  max-width: var(--max-width);
  margin: 0 auto;
  min-height: 100vh;
}
nav.sidebar {
  border-right: 1px solid var(--border);
  padding: 32px 24px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
nav.sidebar h1 {
  font-size: 16px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 24px 0;
  color: var(--accent);
}
nav.sidebar h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 24px 0 8px 0;
}
nav.sidebar ul { list-style: none; padding: 0; margin: 0; }
nav.sidebar li { margin: 6px 0; }
nav.sidebar a {
  color: var(--fg);
  text-decoration: none;
  font-size: 14px;
}
nav.sidebar a:hover, nav.sidebar a.active { color: var(--accent); }
main {
  padding: 48px 56px;
  max-width: 760px;
}
main h1 { font-size: 36px; line-height: 1.2; margin: 0 0 16px 0; }
main h2 { font-size: 22px; margin: 32px 0 12px 0; }
main h3 { font-size: 18px; margin: 24px 0 8px 0; }
main p { margin: 12px 0; }
main a { color: var(--accent); }
main code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.9em;
}
main pre {
  background: var(--code-bg);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
}
main pre code { background: transparent; padding: 0; }
main table { border-collapse: collapse; margin: 16px 0; width: 100%; font-size: 14px; }
main th, main td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
main th { background: var(--code-bg); font-weight: 600; }
main blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  border-left: 4px solid var(--accent);
  background: var(--code-bg);
  font-size: 14px;
}
.banner {
  background: #fff8ed;
  border: 1px solid #f5d9a3;
  padding: 12px 16px;
  border-radius: 8px;
  margin: 0 0 24px 0;
  font-size: 14px;
}