body{font-family:system-ui,-apple-system,"Segoe UI","Hiragino Sans","Noto Sans JP",sans-serif;max-width:720px;margin:40px auto;padding:0 20px;line-height:1.7;color:#1d2b26}
h1{color:#0f3d30;font-size:1.6em}h2{color:#1f7a5c;font-size:1.15em;margin-top:1.8em}
code{background:#eef5f2;padding:1px 5px;border-radius:4px}nav{font-size:.9em;margin-bottom:24px}a{color:#1f7a5c}
footer{margin-top:40px;font-size:.85em;color:#5b6b65}