:root {
    --ke-bg: #f4f6f8;
    --ke-surface: #ffffff;
    --ke-line: #dbe1e7;
    --ke-text: #17202a;
    --ke-muted: #6b7785;
    --ke-primary: #176b5b;
    --ke-primary-dark: #0f4e43;
    --ke-accent: #d89a24;
    --ke-danger: #bc3c3c;
}

.pos-topbar {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 22px;
    background: var(--ke-surface);
    border-bottom: 1px solid var(--ke-line);
    position: sticky;
    top: 0;
    z-index: 20;
}

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    margin-right: 10px;
    color: #fff;
    background: var(--ke-primary);
    border-radius: 8px;
    font-weight: 800;
}

.brand-name { font-size: 1.05rem; font-weight: 800; }

.topbar-brand-link {
    display: inline-flex;
    align-items: center;
    color: inherit;
    text-decoration: none;
}

.topbar-meta {
    display: flex;
    align-items: center;
    gap: 18px;
    color: var(--ke-muted);
    font-size: .92rem;
}

.topbar-meta a {
    color: inherit;
    text-decoration: none;
}

.topbar-meta a:hover { color: var(--ke-primary-dark); }

.pos-shell {
    height: calc(100vh - 64px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) 420px;
    gap: 14px;
    padding: 14px;
}

.pos-shell.has-sidebar {
    margin-left: 240px;
}

.product-pane,
.cart-pane {
    min-height: 0;
    background: var(--ke-surface);
    border: 1px solid var(--ke-line);
    border-radius: 8px;
    overflow: hidden;
}

.pane-header {
    padding: 16px;
    border-bottom: 1px solid var(--ke-line);
}

.pane-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
}

.search-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 170px;
    gap: 10px;
    margin-top: 12px;
}

.search-input,
.category-select {
    height: 46px;
    border-radius: 8px;
}

.product-grid {
    height: calc(100% - 116px);
    overflow: auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    align-content: start;
    gap: 12px;
    padding: 14px;
}

.product-card {
    min-height: 138px;
    border: 1px solid var(--ke-line);
    border-radius: 8px;
    padding: 12px;
    background: #fff;
    cursor: pointer;
    transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

.product-card:hover,
.product-card:focus {
    outline: 0;
    border-color: rgba(23, 107, 91, .45);
    box-shadow: 0 10px 24px rgba(23, 32, 42, .08);
    transform: translateY(-1px);
}

.product-name {
    min-height: 42px;
    margin-bottom: 8px;
    font-weight: 800;
    line-height: 1.2;
}

.product-code,
.product-stock {
    color: var(--ke-muted);
    font-size: .82rem;
}

.product-price {
    margin-top: 10px;
    color: var(--ke-primary-dark);
    font-weight: 900;
}

.cart-pane {
    display: flex;
    flex-direction: column;
}

.cart-list {
    flex: 1;
    min-height: 0;
    overflow: auto;
    padding: 12px 14px;
}

.cart-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 96px 32px;
    gap: 10px;
    padding: 12px 0;
    border-bottom: 1px solid var(--ke-line);
}

.cart-item-name { font-weight: 800; }

.cart-item-meta {
    color: var(--ke-muted);
    font-size: .84rem;
}

.qty-control {
    display: grid;
    grid-template-columns: 28px 38px 28px;
    height: 32px;
    border: 1px solid var(--ke-line);
    border-radius: 8px;
    overflow: hidden;
}

.qty-control button {
    border: 0;
    background: #f7f9fb;
    font-weight: 800;
}

.qty-control input {
    width: 100%;
    border: 0;
    text-align: center;
    font-weight: 800;
}

.remove-btn {
    width: 32px;
    height: 32px;
    border: 0;
    border-radius: 8px;
    color: var(--ke-danger);
    background: #fff1f1;
}

.cart-summary {
    padding: 14px;
    border-top: 1px solid var(--ke-line);
    background: #fbfcfd;
}

.summary-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    color: var(--ke-muted);
}

.summary-total {
    color: var(--ke-text);
    font-size: 1.45rem;
    font-weight: 900;
}

.checkout-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.btn-ke-primary {
    color: #fff;
    background: var(--ke-primary);
    border-color: var(--ke-primary);
}

.btn-ke-primary:hover {
    color: #fff;
    background: var(--ke-primary-dark);
    border-color: var(--ke-primary-dark);
}

.btn-ke-accent {
    color: #1d1b16;
    background: var(--ke-accent);
    border-color: var(--ke-accent);
    font-weight: 800;
}

.empty-state {
    height: 100%;
    display: grid;
    place-items: center;
    color: var(--ke-muted);
    text-align: center;
    padding: 28px;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 30px;
    padding: 4px 10px;
    border-radius: 999px;
    color: var(--ke-primary-dark);
    background: #e7f3f0;
    font-size: .82rem;
    font-weight: 800;
}

@media (max-width: 992px) {
    .pos-shell,
    .pos-shell.has-sidebar {
        height: auto;
        grid-template-columns: 1fr;
        margin-left: 0;
    }

    .product-pane { min-height: 520px; }
    .cart-pane { min-height: 560px; }
}

@media (max-width: 576px) {
    .pos-topbar {
        height: auto;
        align-items: flex-start;
        flex-direction: column;
        padding: 12px;
    }

    .topbar-meta {
        flex-wrap: wrap;
        gap: 8px 14px;
    }

    .search-row,
    .checkout-actions { grid-template-columns: 1fr; }

    .product-grid {
        grid-template-columns: 1fr 1fr;
        padding: 10px;
    }
}