:root{color-scheme:light dark;--bg:#f6f7fb;--card:#fff;--text:#101216;--muted:#667085;--accent:#0799a9;--line:#e5e7eb}
@media(prefers-color-scheme:dark){:root{--bg:#0d1117;--card:#151b23;--text:#f5f7fa;--muted:#9aa4b2;--line:#2b3440}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
main{max-width:820px;margin:0 auto;padding:56px 20px 80px}.brand{font-size:28px;font-weight:760;letter-spacing:-.02em}.tag{color:var(--muted);margin-top:4px}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:26px;margin-top:24px}
h1{font-size:34px;line-height:1.15;letter-spacing:-.03em;margin:0 0 8px}h2{font-size:20px;margin:28px 0 8px}p,li{color:var(--text)}
small,.muted{color:var(--muted)}a{color:var(--accent);font-weight:600;text-decoration:none}a:hover{text-decoration:underline}
nav{display:flex;gap:16px;flex-wrap:wrap;margin-top:18px}.lang{border-top:1px solid var(--line);margin-top:36px;padding-top:28px}
footer{margin-top:34px;color:var(--muted);font-size:14px}