:root{--ink:#111827;--muted:#4b5563;--line:#e5e7eb;--accent:#2563eb;--bg:#fff}
@media (prefers-color-scheme:dark){:root{--ink:#f3f4f6;--muted:#9ca3af;--line:#374151;--accent:#60a5fa;--bg:#111827}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:760px;margin:0 auto;padding:48px 16px 80px}a{color:var(--accent)}
h1{font-size:2rem;line-height:1.2;margin:16px 0 4px}h2{font-size:1.15rem;margin:32px 0 8px}p,li{color:var(--muted)}
.meta{font-size:.9rem;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:16px}
.back{font-size:.95rem;text-decoration:none}