:root{--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--brand:#2563eb}*{box-sizing:border-box}
body{margin:0;font:15px/1.65 Inter,Segoe UI,Arial,sans-serif;color:var(--ink);background:#f8fafc}
header{background:#fff;border-bottom:1px solid var(--line)}header .bar{max-width:860px;margin:auto;padding:12px 20px;display:flex;gap:12px;align-items:center}
.logo{width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:13px;text-decoration:none}
header nav{margin-left:auto;display:flex;gap:14px;font-size:14px}header nav a{color:var(--muted);text-decoration:none}header nav a:hover{color:var(--brand)}
main{max-width:860px;margin:24px auto;background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px 32px}
h1{font-size:24px;margin:0 0 4px}h2{font-size:17px;margin:26px 0 6px}p,li{color:#334155}.muted{color:var(--muted);font-size:13px}
.en{border-top:1px dashed var(--line);margin-top:30px;padding-top:6px}code{background:#f1f5f9;padding:1px 6px;border-radius:5px}
.claim{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}.claim input{flex:1;min-width:260px;border:1px solid var(--line);border-radius:9px;padding:9px 12px;font:inherit}.claim button,#copy{border:0;border-radius:9px;padding:9px 16px;background:var(--brand);color:#fff;font:inherit;font-weight:600;cursor:pointer}#copy{padding:3px 10px;font-size:13px}
.state{font-weight:600;background:#f8fafc;border:1px solid var(--line);border-radius:9px;padding:9px 12px}#link{border:0;border-radius:9px;padding:10px 18px;background:var(--brand);color:#fff;font:inherit;font-weight:600;cursor:pointer}#link:disabled{opacity:.5}.token{word-break:break-all;font-size:12.5px}
.fbbtn{display:inline-flex;align-items:center;gap:8px;background:#1877f2;color:#fff!important;text-decoration:none;font-weight:600;border-radius:10px;padding:11px 20px}.fbbtn:hover{background:#166fe5}details.legacy{margin-top:30px;border-top:1px dashed var(--line);padding-top:10px}details.legacy summary{cursor:pointer;color:var(--muted)}