:root{
  --brand-bg:#0F172A;
  --brand-fg:#FFFFFF;
  --brand-acc:#10B981;
  --brand-accent-2:#F59E0B;
  --danger:#EF4444;
  --muted:#64748B;
  --card:#111827;
  --border:#1F2937;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;background:var(--brand-bg);color:var(--brand-fg)}
.app-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border)}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{width:40px;height:40px;border-radius:10px}
.brand-title{margin:0;font-size:18px}
.brand-subtitle{margin:0;color:var(--muted);font-size:12px}
.container{display:flex;flex-direction:column;gap:16px;padding:16px;max-width:640px;margin:0 auto}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px}
.section-title{margin:0 0 8px 0;font-size:16px}
.row{display:flex;align-items:center}
.gap{gap:8px}
.input{flex:1;padding:12px;border-radius:12px;border:1px solid var(--border);background:#0b1220;color:var(--brand-fg)}
.btn{padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:#131a2a;color:var(--brand-fg);cursor:pointer}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--brand-accent-2);color:#111}
.btn-outline{background:transparent}
.btn-success{background:var(--brand-acc);color:#111}
.status{margin-top:8px;color:var(--muted)}
.scanner-panel{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--border)}
.video{width:100%;height:auto;background:#000}
.overlay{position:absolute;inset:0}
.cart{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.cart-row{display:grid;grid-template-columns:1fr auto auto auto;gap:8px;align-items:center;padding:8px;border-radius:12px;border:1px solid var(--border);background:#0b1220}
.cart-row.red{border-color:var(--danger);box-shadow:0 0 0 2px rgba(239,68,68,.2) inset}
.cart-sku{font-weight:600}
.cart-name{color:var(--muted);font-size:12px}
.qty-editor{display:flex;align-items:center;gap:6px}
.qty-input{width:72px;text-align:center;padding:8px;border-radius:10px;border:1px solid var(--border);background:#0b1220;color:var(--brand-fg)}
.badge{font-size:11px;padding:4px 6px;border-radius:8px;background:#0f1a2f;color:#9fb0c9}
.badge.danger{background:#2a0f10;color:#f99}
.cart-footer{display:flex;justify-content:space-between;align-items:center;margin-top:12px}
.mx{margin:0 8px}
.footer{padding:16px;text-align:center;color:var(--muted)}
@media (min-width:680px){ .container{max-width:420px} }