:root { color-scheme: light; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  line-height: 1.7;
  max-width: 1000px;
  margin: 24px auto;
  padding: 0 16px;
  color: #111;
  background: #fff;
}
img { max-width: 100%; height: auto; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
pre { background: #f6f8fa; padding: 12px; overflow: auto; border-radius: 8px; }
blockquote { border-left: 4px solid #d0d7de; padding-left: 12px; color: #57606a; }
table { border-collapse: collapse; }
th, td { border: 1px solid #d0d7de; padding: 6px 10px; }
a { color: #0969da; }