body {
    background-color: #f4f6f9;
}
.card {
    border: none;
    border-radius: 12px;
}
.stat-card {
    border-radius: 14px;
    color: #fff;
    padding: 1.25rem 1.5rem;
}
.stat-card h3 { font-weight: 700; margin: 0; }
.stat-card small { opacity: .85; }
.bg-grad-blue   { background: linear-gradient(135deg,#4e73df,#3654b0); }
.bg-grad-green  { background: linear-gradient(135deg,#1cc88a,#159a68); }
.bg-grad-orange { background: linear-gradient(135deg,#f6c23e,#dda520); }
.bg-grad-red    { background: linear-gradient(135deg,#e74a3b,#c0392b); }

#qr-reader {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
}
.cart-table tbody tr td { vertical-align: middle; }
.low-stock-row { background-color: #fff3cd !important; }
.out-of-stock-row { background-color: #f8d7da !important; }
.qr-thumb { width: 60px; height: 60px; object-fit: contain; }
.table-responsive { border-radius: 10px; overflow: hidden; }