:root{color-scheme:light;--ink:#192638;--muted:#64748b;--line:#e2e8f0;--blue:#2563eb}*{box-sizing:border-box}body{margin:0;background:#f8fafc;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);line-height:1.65}main{max-width:760px;margin:5vh auto;padding:36px;background:white;border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 30px #0f172a0a}h1{font-size:2rem;line-height:1.2;margin:0 0 10px}h2{font-size:1.16rem;margin:28px 0 8px}p,li{font-size:1rem}small,.muted{color:var(--muted)}a{color:var(--blue)}nav{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:32px;font-size:.95rem}footer{border-top:1px solid var(--line);margin-top:32px;padding-top:18px;color:var(--muted);font-size:.9rem}.notice{padding:14px 18px;border:1px solid #bfdbfe;background:#eff6ff;border-radius:10px}code{background:#f1f5f9;padding:2px 5px;border-radius:4px}@media(max-width:800px){main{margin:0;min-height:100vh;border:0;border-radius:0;padding:28px 22px}}