:root {
  --bg: #ffffff;
  --text: #1f2937;
  --text-muted: #4b5563;
  --border: #e5e7eb;
  --link: #1d4ed8;
  --link-hover: #1e40af;
  --card-bg: #f9fafb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111827;
    --text: #f9fafb;
    --text-muted: #9ca3af;
    --border: #374151;
    --link: #60a5fa;
    --link-hover: #93c5fd;
    --card-bg: #1f2937;
  }
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  background-color: var(--bg);
  color: var(--text);
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px 16px;
}

header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

nav {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

nav a {
  color: var(--link);
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

h1 {
  font-size: 24px;
  margin-top: 0;
  margin-bottom: 8px;
}

h2 {
  font-size: 18px;
  margin-top: 24px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
}

p, ul, ol {
  margin-top: 0;
  margin-bottom: 16px;
}

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

li {
  margin-bottom: 6px;
}

code {
  font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  background: var(--card-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  border: 1px solid var(--border);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  margin-bottom: 20px;
}

footer {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 40px;
  font-size: 13px;
  color: var(--text-muted);
}