body {
  max-width: 800px;
  margin: 2em auto;
  padding: 0 1em;
  font: 16px/1.5 -apple-system, system-ui, "Segoe UI", sans-serif;
  color: #222;
}
h1, h2, h3 { font-weight: 600; line-height: 1.25; margin-top: 1.5em; }
h1 { border-bottom: 1px solid #eee; padding-bottom: 0.3em; }
code { background: #f4f4f4; padding: 0.1em 0.3em; border-radius: 3px; font-size: 0.92em; }
pre { background: #f7f7f7; padding: 1em; overflow-x: auto; border-radius: 4px; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; margin: 1em 0; }
th, td { border: 1px solid #ddd; padding: 0.4em 0.8em; text-align: left; }
th { background: #f4f4f4; }
a { color: #0366d6; text-decoration: none; }
a:hover { text-decoration: underline; }
blockquote { border-left: 4px solid #ddd; margin: 0; padding: 0 1em; color: #666; }