:root{--bg:#fff;--fg:#14171f;--mute:#5b6270;--line:#e3e6ec;--card:#f6f7fa;--acc:#2f5bea;--code:#0d1117}@media (prefers-color-scheme:dark){:root{--bg:#0b0d12;--fg:#e8eaf0;--mute:#9aa3b2;--line:#222732;--card:#12151c;--acc:#6b8cff}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,Segoe UI,sans-serif}a{color:var(--acc)}.wrap{max-width:880px;margin:0 auto;padding:0 16px}.nav{display:flex;justify-content:space-between;align-items:center;padding-top:20px;padding-bottom:20px}.brand{font-weight:700;color:var(--fg);font-family:ui-monospace,Menlo,monospace}.brand,.btn{text-decoration:none}.btn{display:inline-block;background:var(--acc);color:#fff;border:0;border-radius:8px;padding:12px 20px;font:600 15px system-ui;cursor:pointer}.btn.small{padding:8px 14px;font-size:14px}.btn:disabled{opacity:.6}.hero{padding:72px 0 40px}.hero h1{font-size:clamp(2.2rem,6vw,3.6rem);line-height:1.1;margin:0 0 20px}.hero p{font-size:1.15rem;max-width:640px;margin:0 0 28px}.badge,.hero p{color:var(--mute)}.badge{display:inline-block;border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:13px;margin-bottom:20px}section{padding:36px 0}h2{font-size:1.5rem;margin:0 0 16px}.grid{display:grid;grid-gap:16px;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px}.card h3{margin:0 0 8px;font-size:1.05rem}.card p{margin:0;color:var(--mute);font-size:.95rem}pre{background:var(--code);color:#d6deeb;border-radius:12px;padding:20px;overflow-x:auto;font:13px/1.6 ui-monospace,Menlo,monospace;margin:0}.note{font-size:13px;color:var(--mute);margin-top:8px}form{grid-gap:14px;gap:14px;max-width:440px}form,label{display:grid}label{font-size:14px;color:var(--mute);grid-gap:6px;gap:6px}input,select{background:var(--bg);color:var(--fg);border:1px solid var(--line);border-radius:8px;padding:11px 12px;font:16px system-ui}.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.foot{border-top:1px solid var(--line);margin-top:48px;padding-top:24px;padding-bottom:40px;color:var(--mute);font-size:13px}.legal{padding:32px 0}.legal h1{font-size:2rem}.legal h2{font-size:1.2rem;margin-top:28px}.legal table{border-collapse:collapse;width:100%;font-size:14px;display:block;overflow-x:auto}.legal td,.legal th{border:1px solid var(--line);padding:8px 10px;text-align:left}.legal blockquote{border-left:3px solid var(--line);margin:16px 0;padding:2px 14px;color:var(--mute)}