body {
    background: #f4f6f9;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
}
.topbar { background: #1e3a5f; }
.sidebar {
    width: 230px;
    min-height: calc(100vh - 56px);
    background: #22375a;
    padding-top: 15px;
    flex-shrink: 0;
}
.sidebar a {
    display: block;
    color: #cfd8e3;
    padding: 12px 22px;
    text-decoration: none;
    font-size: 15px;
    border-left: 3px solid transparent;
    transition: 0.15s;
}
.sidebar a i { margin-right: 8px; width: 18px; display: inline-block; }
.sidebar a:hover { background: #2c4874; color: #fff; }
.sidebar a.active { background: #2c4874; color: #fff; border-left-color: #4da3ff; font-weight: 600; }
.card { border: none; border-radius: 12px; box-shadow: 0 2px 10px rgba(0,0,0,0.06); }
.stat-card { border-radius: 14px; color: #fff; padding: 22px; }
.stat-card h3 { font-size: 28px; margin: 0; font-weight: 700; }
.stat-card p { margin: 0; opacity: 0.9; }
.badge-active { background: #2ecc71; }
.badge-inactive { background: #95a5a6; }
.badge-paid { background: #2ecc71; }
.badge-pending { background: #f39c12; }
.badge-delivered { background: #3498db; }
.badge-cancelled { background: #e74c3c; }
@media (max-width: 767px) {
    .sidebar { position: fixed; top: 56px; left: -230px; z-index: 999; transition: 0.25s; }
    .sidebar.show { left: 0; }
}

/* ---- Trang bán hàng (public) ---- */
.shop-hero {
    background: linear-gradient(135deg,#1e3a5f,#2c4874);
    color: #fff;
    padding: 60px 0;
}
.product-card { border-radius: 16px; overflow: hidden; transition: 0.2s; }
.product-card:hover { transform: translateY(-4px); }
.product-card img { height: 200px; object-fit: cover; width: 100%; background: #e9ecef; }
.price-tag { font-size: 26px; font-weight: 700; color: #e74c3c; }
.qr-box { background: #fff; border-radius: 16px; padding: 20px; text-align: center; }

/* ---- Trang chi tiết sản phẩm ---- */
.product-thumb-box {
    background: linear-gradient(135deg, #1e3a5f, #2c4874);
    border-radius: 18px;
    min-height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
}
.product-thumb-box img {
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
    border-radius: 8px;
}
.product-title { font-weight: 700; font-size: 2rem; color: #1c2b3a; }
.product-subtitle { color: #7a8699; font-size: 0.95rem; margin-top: 4px; }
.order-card {
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(30, 58, 95, 0.10);
    padding: 28px !important;
}
.order-card h6 { font-weight: 700; font-size: 1.05rem; color: #1c2b3a; }
.order-card label { font-weight: 500; color: #33404f; margin-bottom: 6px; }
.order-card .form-control { border-radius: 8px; border: 1px solid #dbe1e8; padding: 10px 12px; }
.order-card .btn-primary { background: #2f6fed; border: none; border-radius: 8px; padding: 12px; font-weight: 600; }
.desc-block h5 { font-weight: 700; color: #1c2b3a; }
.desc-block p { color: #33404f; line-height: 1.8; }
.btn-back { border-radius: 8px; color: #33404f; border-color: #cfd8e3; }