:root{color-scheme:light dark;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6;background:#fbf9f3;color:#263023}
*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:850px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid #d9dfd3}.brand{font-weight:800;letter-spacing:-.03em;color:#285a32;text-decoration:none;font-size:1.25rem}nav{display:flex;gap:18px;flex-wrap:wrap}a{color:#245d39}nav a{text-decoration:none;font-weight:600}nav a:hover,a:hover{text-decoration:underline}h1{font-size:clamp(2rem,5vw,3rem);line-height:1.15;letter-spacing:-.035em}h2{margin-top:2rem;font-size:1.35rem}p,li{max-width:72ch}.lead{font-size:1.18rem;color:#465444}.notice{padding:16px 20px;background:#eaf3e6;border-left:4px solid #4f8a50;border-radius:4px}.card{padding:20px;margin:20px 0;border:1px solid #d9dfd3;border-radius:16px;background:#fff}.meta{font-size:.9rem;color:#52624e}footer{border-top:1px solid #d9dfd3;font-size:.9rem;color:#52624e}footer a{margin-right:12px}ul{padding-left:1.5rem}a:focus-visible{outline:3px solid #267c46;outline-offset:3px}
@media(prefers-color-scheme:dark){:root{background:#172019;color:#eef4e8}.brand,a{color:#a9e2ae}.lead,.meta,footer{color:#c2d0bd}.notice{background:#273b2b;border-color:#80ba82}.card{background:#202d22;border-color:#445a48}header,footer{border-color:#445a48}}