/* styles.css v4.4 - blanco + azul */
:root{
  --bg:#f6f8fc;
  --surface:#ffffff;
  --surface2:#f2f6ff;
  --stroke: rgba(15, 23, 42, 0.10);
  --text:#0f172a;
  --muted: rgba(15,23,42,.65);
  --primary:#2563eb;
  --primary2:#60a5fa;
  --accent:#16a34a;
  --danger:#dc2626;
  --shadow: 0 10px 24px rgba(2, 6, 23, .08);
  --radius: 18px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial;color:var(--text);background:var(--bg)}

.topbar{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.78);backdrop-filter: blur(10px);border-bottom:1px solid var(--stroke)}
.topbar__inner{max-width:960px;margin:0 auto;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__logo{width:44px;height:44px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg, var(--primary), var(--primary2));color:#fff;box-shadow:var(--shadow);font-weight:800}
.brand__title{font-weight:900}
.brand__subtitle{font-size:12px;color:var(--muted)}
.chip{padding:8px 10px;border:1px solid var(--stroke);background:rgba(37,99,235,.06);border-radius:999px;font-size:12px;color:rgba(37,99,235,.9);max-width:55%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.wrap{max-width:960px;margin:0 auto;padding:14px 16px 28px}
.card{background:var(--surface);border:1px solid var(--stroke);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin:14px 0}
.card__title{margin:0 0 8px;font-size:16px}
.card__head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;flex-wrap:wrap}
.muted{color:var(--muted);margin:0 0 10px;line-height:1.35}
.small{font-size:12px}
.sub{margin:4px 0 0;font-size:14px}

.label{display:block;font-size:12px;color:var(--muted);margin:10px 0 6px}
.input,.select{width:100%;padding:12px;border-radius:14px;border:1px solid var(--stroke);background:#fff;color:var(--text);outline:none}
.input:focus,.select:focus{border-color:rgba(37,99,235,.55);box-shadow:0 0 0 4px rgba(37,99,235,.12)}

.btn{padding:12px 14px;border-radius:14px;border:1px solid var(--stroke);background:var(--surface2);color:var(--text);cursor:pointer;font-weight:800}
.btn:active{transform:translateY(1px)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn--primary{background:linear-gradient(135deg, var(--primary), var(--primary2));border-color:rgba(37,99,235,.35);color:#fff}
.btn--accent{background:linear-gradient(135deg, #16a34a, #4ade80);border-color:rgba(22,163,74,.35);color:#fff}
.btn--ghost{background:transparent;border-color:rgba(15,23,42,.18)}

.keyrow{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.keyrow__left{flex:1 1 240px}

/* selector de cámara */
.camera-picker{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap;min-width:260px}
.camera-picker .select{min-width:220px}

/* visor */
.scanner__box{width:100%;max-width:520px;margin:0 auto;border-radius:18px;overflow:hidden;border:1px dashed rgba(15,23,42,.18);background:rgba(2,6,23,.05);
  aspect-ratio: 4/3; height:auto; max-height:320px;}
.scanner__box video,.scanner__box canvas{width:100% !important;height:100% !important;object-fit:cover;}

.scanner__meta{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.status{padding:10px 12px;border-radius:14px;border:1px solid var(--stroke);background:rgba(15,23,42,.03);color:var(--muted);flex:1 1 240px;min-width:220px}
.status.ok{color:rgba(22,163,74,.95)}
.status.err{color:rgba(220,38,38,.95)}
.status.warn{color:rgba(217,119,6,.95)}
.btnrow{display:flex;gap:10px}

.notice{border-radius:16px;padding:12px;border:1px solid var(--stroke);background:rgba(15,23,42,.03)}
.notice.ok{border-color:rgba(22,163,74,.25);background:rgba(22,163,74,.08)}
.notice.err{border-color:rgba(220,38,38,.25);background:rgba(220,38,38,.08)}
.notice.warn{border-color:rgba(217,119,6,.25);background:rgba(217,119,6,.08)}

.product__row{display:grid;grid-template-columns:1.3fr .7fr;gap:12px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}

.kv{padding:12px;border:1px solid var(--stroke);border-radius:16px;background:rgba(15,23,42,.02)}
.kv__k{font-size:12px;color:var(--muted);margin-bottom:6px}
.kv__v{font-size:14px;font-weight:900;word-break:break-word}
.kv__v--big{font-size:22px}
.sep{border:0;border-top:1px solid rgba(15,23,42,.10);margin:10px 0}
.stock{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.stock__btn{display:flex;gap:10px}
.footer-actions{display:flex;justify-content:center}
.foot{padding:8px 4px 0;text-align:center}

@media (max-width:768px){
  .product__row{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .btnrow{width:100%}
  .btnrow .btn{flex:1}
  .scanner__box{max-height:280px; aspect-ratio:16/9;}
  .camera-picker{width:100%}
  .camera-picker .select{flex:1; min-width:180px}
}