/* Minimal, clean styles (no frameworks) */
:root{
  --bg:#0b0f14;
  --card:#111827;
  --muted:#94a3b8;
  --text:#e5e7eb;
  --accent:#22c55e;
  --accent-press:#16a34a;
  --danger:#ef4444;
  --warn:#f59e0b;
  --border:#1f2937;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;
  background:radial-gradient(1200px 800px at 80% -10%, #0f172a 0, #0b0f14 60%);
  color:var(--text);
}
.container{max-width:720px;margin:40px auto;padding:0 16px}
.hero h1{margin:0 0 4px;font-size:28px;letter-spacing:.2px}
.sub{color:var(--muted);margin:0}
.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:20px;margin-top:18px;box-shadow:0 10px 35px rgba(0,0,0,.2)}
.field{margin-bottom:14px}
label{display:block;margin:0 0 6px;font-weight:600}
input{
  width:100%;padding:12px 14px;border:1px solid var(--border);
  border-radius:12px;background:#0b1220;color:var(--text);outline:none
}
input:focus{border-color:#334155;box-shadow:0 0 0 3px rgba(51,65,85,.35)}
.row{display:flex;gap:10px;align-items:center}
button{
  padding:12px 16px;border-radius:12px;border:1px solid #16a34a;
  background:linear-gradient(180deg,var(--accent),var(--accent-press));
  color:#06120a;font-weight:700;cursor:pointer
}
button:disabled{opacity:.6;cursor:not-allowed}
button.secondary{background:#0b1220;color:var(--text);border:1px solid var(--border)}
.note{color:var(--muted);font-size:13px;margin-top:10px}
.status, .result{display:flex;gap:14px;align-items:flex-start;margin-top:16px}
.muted{color:var(--muted)}
.loader{
  width:22px;height:22px;border-radius:50%;
  border:3px solid #1f2937;border-top-color:#22c55e;animation:spin 1s linear infinite;flex:0 0 22px
}
@keyframes spin{to{transform:rotate(360deg)}}
.footer{margin:28px 0;color:var(--muted)}
pre{white-space:pre-wrap;word-break:break-word;background:#0b1220;border:1px solid var(--border);border-radius:12px;padding:12px}