:root {
  --bg: #fff;
  --fg: #24292e;
  --muted: #586069;
  --border: #e1e4e8;
  --link: #0366d6;
  --code-bg: #f6f8fa;
  --nav-bg: #fafbfc;
  --nav-active: #0366d6;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
nav {
  width: 240px;
  min-height: 100vh;
  background: var(--nav-bg);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  align-self: flex-start;
}

nav .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  display: block;
  margin-bottom: 24px;
}

nav ul {
  list-style: none;
}

nav ul li {
  margin-bottom: 4px;
}

nav ul li a {
  display: block;
  padding: 6px 12px;
  color: var(--muted);
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.875rem;
}

nav ul li a:hover {
  color: var(--fg);
  background: var(--border);
}

nav ul li a.active {
  color: var(--nav-active);
  font-weight: 600;
  background: #e8f0fe;
}

nav .github {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

nav .github a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8125rem;
}

nav .github a:hover {
  color: var(--link);
}

/* Main content */
main {
  flex: 1;
  max-width: 800px;
  padding: 40px 48px;
}

h1 { font-size: 2rem; margin-bottom: 16px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
h2 { font-size: 1.5rem; margin-top: 32px; margin-bottom: 12px; }
h3 { font-size: 1.125rem; margin-top: 24px; margin-bottom: 8px; }

p { margin-bottom: 12px; }

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

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.8125rem;
  line-height: 1.5;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

th, td {
  text-align: left;
  padding: 8px 12px;
  border: 1px solid var(--border);
  font-size: 0.875rem;
}

th {
  background: var(--code-bg);
  font-weight: 600;
}

ul, ol {
  margin-bottom: 12px;
  padding-left: 24px;
}

li { margin-bottom: 4px; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.warning {
  background: #fff8e1;
  border-left: 4px solid #f9a825;
  padding: 12px 16px;
  margin-bottom: 16px;
  border-radius: 0 6px 6px 0;
  font-size: 0.875rem;
}

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8125rem;
}