:root{color-scheme:light dark;--bg:#fafaf8;--fg:#141414;--muted:#5c5c5c;--accent:#0A8A66;--line:#e4e4e0;--card:#ffffff}
@media(prefers-color-scheme:dark){:root{--bg:#101012;--fg:#f2f2f0;--muted:#a3a3a0;--accent:#3DD598;--line:#26262a;--card:#18181b}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Helvetica,Arial,sans-serif}
main{max-width:680px;margin:0 auto;padding:32px 20px 64px}
header{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:28px}
header a.brand{font-weight:700;text-decoration:none;color:var(--fg);letter-spacing:-.01em}
nav a{color:var(--muted);text-decoration:none;margin-left:14px;font-size:15px}nav a:hover,nav a[aria-current]{color:var(--accent)}
.lang{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang button{background:none;border:0;color:var(--muted);padding:6px 12px;font:600 13px inherit;cursor:pointer}
.lang button[aria-pressed=true]{background:var(--accent);color:#fff}
h1{font-size:30px;line-height:1.2;letter-spacing:-.02em;margin:0 0 8px}h2{font-size:20px;margin:32px 0 8px}h3{font-size:17px;margin:24px 0 4px}
p,li{color:var(--fg)}.muted{color:var(--muted)}a{color:var(--accent)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin:20px 0}
.cta{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;padding:12px 18px;border-radius:12px}
footer{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
[hidden]{display:none!important}
dl dt{font-weight:600;margin-top:14px}dl dd{margin:2px 0 0}