:root {
  --bg: #ffffff;
  --bg-muted: #f6f8fa;
  --text: #1f2328;
  --text-muted: #59636e;
  --border: #d0d7de;
  --link: #0969da;
  --code-bg: #f6f8fa;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-muted);
  padding: 1.25rem 1rem;
}

.brand {
  margin: 0 0 1rem;
  font-size: 1.2rem;
}

.brand a {
  color: var(--text);
}

.sidebar .meta {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.nav-section {
  margin-bottom: 1.2rem;
}

.nav-section h2 {
  margin: 0 0 0.45rem;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-section li {
  margin: 0.2rem 0;
}

.main {
  padding: 1.5rem 2rem;
  max-width: 980px;
}

.breadcrumbs {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.main h1 {
  margin-top: 0;
  font-size: 1.9rem;
}

.note,
.tip,
.warning {
  border-left: 4px solid var(--border);
  background: var(--bg-muted);
  padding: 0.75rem 0.9rem;
  margin: 1rem 0;
}

.tip {
  border-left-color: #1a7f37;
}

.warning {
  border-left-color: #cf222e;
}

pre {
  margin: 0.8rem 0;
  padding: 0.9rem;
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

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

.on-this-page {
  border: 1px solid var(--border);
  background: var(--bg-muted);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  margin: 1rem 0 1.5rem;
}

.on-this-page h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.on-this-page ul {
  margin: 0;
  padding-left: 1.1rem;
}

.footer-note {
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 0.86rem;
}

@media (max-width: 900px) {
  .layout {
    display: block;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .main {
    padding: 1.2rem 1rem 1.6rem;
  }
}


table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.8rem 0 1rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--bg-muted);
}