:root{--bg:#f4f6f3;--card:#fff;--ink:#16211c;--muted:#5b6b63;--pine:#2f6b57;--line:#dde5e1}
@media (prefers-color-scheme:dark){:root{--bg:#121816;--card:#1b2320;--ink:#e8efeb;--muted:#9fb0a8;--pine:#6cc0a0;--line:#2a3531}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 18px 64px}
h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:40px;line-height:1.15;margin:0 0 6px}
h2{font-size:19px;margin:32px 0 8px}p,li{color:var(--ink)}.muted{color:var(--muted)}
a{color:var(--pine);font-weight:600}nav{display:flex;gap:18px;margin-bottom:28px;font-size:15px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 20px;margin:16px 0}
ul{padding-left:22px}footer{margin-top:48px;font-size:13px;color:var(--muted)}