/* ごく簡単なベーススタイル */ 
:root { font-family: system-ui, -apple-system, Segoe UI, Roboto, Noto Sans JP, sans-serif; }
body { margin: 0; padding: 32px; }
main { max-width: 880px; margin: 0 auto; }
a { text-decoration: none; }
a:hover { text-decoration: underline; }