:root{
  --bg:#0b1020; --bg2:#131a33; --card:rgba(255,255,255,.045);
  --line:rgba(255,255,255,.10); --txt:#eef2ff; --muted:#93a0c0;
  --accent:#2ee6c5; --accent2:#5b8cff; --danger:#ff6b6b;
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(91,140,255,.22), transparent 60%),
    radial-gradient(900px 500px at 90% 0%, rgba(46,230,197,.16), transparent 55%),
    var(--bg);
  color:var(--txt); min-height:100vh; -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:760px;margin:0 auto;padding:28px 18px 64px}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:26px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;letter-spacing:-.02em}
.brand .mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#04121a;font-weight:800}
.tag{font-size:12px;color:var(--muted);border:1px solid var(--line);padding:5px 10px;border-radius:999px}
h1{font-size:clamp(24px,5vw,34px);line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}
.sub{color:var(--muted);font-size:15px;line-height:1.6;margin:0 0 26px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;backdrop-filter:blur(12px)}
.card + .card{margin-top:16px}
label{display:block;font-size:13px;color:var(--muted);margin:0 0 7px;font-weight:600}
.row{display:grid;gap:14px}
.row.two{grid-template-columns:1fr 1fr}
@media(max-width:560px){.row.two{grid-template-columns:1fr}}
input,select,textarea{
  width:100%;padding:13px 14px;border-radius:12px;border:1px solid var(--line);
  background:rgba(0,0,0,.28);color:var(--txt);font-size:15px;font-family:inherit;outline:none;
  transition:border-color .15s, box-shadow .15s;
}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(46,230,197,.12)}
textarea{min-height:76px;resize:vertical}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  width:100%;padding:14px 18px;border-radius:12px;border:0;cursor:pointer;
  font-size:15px;font-weight:700;font-family:inherit;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#06121b;
  transition:transform .08s ease, filter .15s;
}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--txt)}
.btn.small{width:auto;padding:9px 14px;font-size:13px;border-radius:10px}
.hint{font-size:12.5px;color:var(--muted);line-height:1.6;margin-top:10px}
.out{margin-top:18px;display:none}
.out.show{display:block}
.linkbox{
  display:flex;gap:8px;align-items:center;background:rgba(0,0,0,.32);
  border:1px solid var(--line);border-radius:12px;padding:10px 12px;
}
.linkbox code{flex:1;font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#b9c6ea}
.amount{font-size:clamp(34px,9vw,52px);font-weight:800;letter-spacing:-.03em;margin:4px 0 2px}
.cur{font-size:16px;color:var(--muted);font-weight:700;margin-left:6px}
.kv{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-top:1px solid var(--line);font-size:14.5px}
.kv:first-of-type{border-top:0}
.kv .k{color:var(--muted)}
.kv .v{text-align:right;word-break:break-all;max-width:62%}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px}
.qr{background:#fff;padding:12px;border-radius:14px;width:196px;height:196px;margin:18px auto 8px;display:grid;place-items:center}
.qr svg{width:100%;height:100%;display:block}
.badge{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;
  padding:6px 11px;border-radius:999px;background:rgba(46,230,197,.13);color:var(--accent);border:1px solid rgba(46,230,197,.28)}
.badge.warn{background:rgba(255,107,107,.12);color:var(--danger);border-color:rgba(255,107,107,.3)}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor}
.foot{margin-top:30px;text-align:center;color:var(--muted);font-size:12.5px;line-height:1.8}
.err{color:var(--danger);font-size:14px;line-height:1.6}
.center{text-align:center}
.copy-ok{color:var(--accent);font-size:12.5px;margin-left:8px}
.langs{display:flex;gap:6px}
.langs button{background:transparent;border:1px solid var(--line);color:var(--muted);border-radius:8px;
  padding:4px 9px;font-size:12px;cursor:pointer;font-family:inherit}
.langs button.on{color:var(--txt);border-color:var(--accent)}