:root{--bg:#EEF6F0;--ink:#173B2A;--sub:#5C7468;--leaf:#2B7D55;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#0F1A14;--ink:#E6F1EA;--sub:#9DB5A8;--leaf:#6FCB98;--card:#18261E}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Rounded","Segoe UI",Roboto,sans-serif}
main{max-width:640px;margin:0 auto;padding:40px 16px 64px}h1{font-size:30px;line-height:1.2;margin:8px 0 12px}h2{font-size:20px;margin:28px 0 6px}
p,li{color:var(--ink)}.sub{color:var(--sub)}a{color:var(--leaf)}img.tuck{width:120px;height:auto;display:block}
.card{background:var(--card);border-radius:20px;padding:20px 22px;margin-top:20px}nav{margin-top:36px;font-size:15px}nav a{margin-right:18px}