:root{
  --bg:#0b1730;
  --panel:#f7f7f9;
  --ink:#101114;
  --muted:#667085;
  --primary:#2563eb;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(135deg,#081225,#10264d);color:#fff}
.app{display:grid;grid-template-columns:360px 1fr;min-height:100vh;gap:18px;padding:18px}
.panel{background:var(--panel);color:var(--ink);border-radius:22px;padding:20px;box-shadow:0 10px 30px rgba(0,0,0,.18)}
h1{margin:0 0 8px;font-size:38px}
.muted{color:var(--muted);margin:0 0 18px}
label{display:block;font-weight:700;margin:12px 0 6px}
input,select,button{width:100%;padding:12px 14px;border-radius:12px;border:1px solid #d0d5dd;font-size:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
button{background:var(--primary);color:#fff;border:none;font-weight:700;cursor:pointer}
button:nth-child(2){background:#111827}
.warn{font-size:14px;line-height:1.5;color:#475467;background:#eef2ff;padding:12px;border-radius:12px;margin-top:14px}
.stageWrap{background:rgba(255,255,255,.08);border:1px dashed rgba(255,255,255,.15);border-radius:24px;padding:16px;overflow:auto}
.status{font-weight:700;margin-bottom:12px}
.stage{min-height:700px;background:#eef0f2;border-radius:20px;display:flex;align-items:center;justify-content:center;padding:20px}
.stage svg{max-width:100%;height:auto;background:#f2f2f2}
@media (max-width: 980px){.app{grid-template-columns:1fr}.stage{min-height:500px}}