*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  color: #111827;
  background: #ffffff;
}

a {
  color: #2563eb;
}

img {
  max-width: 100%;
  height: auto;
}

/* Markdown content */
article h2, article h3, article h4 {
  margin-top: 2rem;
}

article pre {
  background: #f3f4f6;
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
}

article code {
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
}

article blockquote {
  border-left: 4px solid #d1d5db;
  margin: 0;
  padding-left: 1rem;
  color: #6b7280;
}