:root{
  --nc-bg:#0f172a; --nc-card:#ffffff; --nc-ink:#0f172a; --nc-muted:#64748b;
  --nc-teal:#0ea5e9; --nc-teal-d:#0284c7; --nc-blue:#1e3a8a;
  --nc-green:#16a34a; --nc-red:#dc2626; --nc-amber:#d97706;
  --nc-line:#e2e8f0; --radius:16px;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:linear-gradient(160deg,#0f172a 0%,#0c4a6e 100%);
  min-height:100vh;color:var(--nc-ink);
  -webkit-tap-highlight-color:transparent;
}
.wrap{max-width:520px;margin:0 auto;padding:16px}
.brand{display:flex;align-items:center;gap:10px;color:#e2f5f4;padding:14px 4px 8px}
.brand .dot{width:30px;height:30px;border-radius:9px;background:var(--nc-teal);
  display:grid;place-items:center;font-weight:800;color:#042f2e}
.brand h1{font-size:19px;margin:0;font-weight:700;letter-spacing:.2px}
.brand small{display:block;color:#94c9c7;font-weight:500;font-size:12px}
.card{background:var(--nc-card);border-radius:var(--radius);padding:20px;
  box-shadow:0 10px 30px rgba(0,0,0,.25);margin-bottom:16px}
h2{margin:0 0 4px;font-size:20px}
.muted{color:var(--nc-muted);font-size:14px;margin:0 0 16px}
label{display:block;font-size:13px;font-weight:600;color:#334155;margin:12px 0 6px}
input,select{width:100%;padding:13px 14px;border:1px solid var(--nc-line);border-radius:12px;
  font-size:16px;background:#f8fafc;color:var(--nc-ink)}
input:focus,select:focus{outline:none;border-color:var(--nc-teal);background:#fff}
.btn{display:block;width:100%;border:0;border-radius:12px;padding:15px;font-size:16px;
  font-weight:700;color:#fff;background:var(--nc-teal);cursor:pointer;margin-top:16px}
.btn:active{transform:translateY(1px)}
.btn.big{padding:20px;font-size:19px}
.btn.green{background:var(--nc-green)}
.btn.red{background:var(--nc-red)}
.btn.blue{background:var(--nc-blue)}
.btn.ghost{background:#f1f5f9;color:#334155}
.btn[disabled]{opacity:.55}
.row{display:flex;gap:10px}
.row>*{flex:1}
.center{text-align:center}
.big-status{font-size:15px;font-weight:600;padding:12px;border-radius:12px;margin:8px 0}
.st-in{background:#dcfce7;color:#166534}
.st-out{background:#f1f5f9;color:#334155}
.msg{padding:12px 14px;border-radius:12px;font-size:14px;margin:12px 0;font-weight:600}
.msg.err{background:#fee2e2;color:#991b1b}
.msg.ok{background:#dcfce7;color:#166534}
.msg.warn{background:#fef3c7;color:#92400e}
.spin{width:22px;height:22px;border:3px solid #cbd5e1;border-top-color:var(--nc-teal);
  border-radius:50%;animation:sp 1s linear infinite;display:inline-block;vertical-align:middle}
@keyframes sp{to{transform:rotate(360deg)}}
.footer{text-align:center;color:#7fb3b1;font-size:12px;padding:10px}
a.link{color:var(--nc-teal);font-weight:600;text-decoration:none}
.hint{font-size:13px;color:var(--nc-muted);text-align:center;margin-top:10px}
.qrgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.big-emoji{font-size:52px;text-align:center;margin:6px 0}