:root{--bg:#f7f8f3;--fg:#17201a;--muted:#4b5a4f;--card:#fff;--line:#dfe5d8;--accent:#3d6b2f}
@media (prefers-color-scheme:dark){:root{--bg:#121a14;--fg:#eef3e8;--muted:#b3c0b3;--card:#1b261e;--line:#2c3a2f;--accent:#d9f2a0}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 16px 64px}h1{font-size:2rem;line-height:1.2;margin:0 0 8px}h2{font-size:1.2rem;margin:32px 0 8px}
p,li{color:var(--muted)}strong{color:var(--fg)}a{color:var(--accent)}nav{display:flex;gap:16px;margin-bottom:32px;font-weight:600}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin:16px 0}footer{margin-top:48px;font-size:.9rem;color:var(--muted)}