/* ===== POS Light Theme ===== */
:root {
    --pos-primary: #4f46e5;
    --pos-primary-dark: #3730a3;
    --pos-primary-light: #6366f1;
    --pos-accent: #06b6d4;
    --pos-success: #10b981;
    --pos-danger: #ef4444;
    --pos-warning: #f59e0b;
    --pos-bg: #f1f5f9;
    --pos-surface: #ffffff;
    --pos-surface-light: #f8fafc;
    --pos-text: #1e293b;
    --pos-text-muted: #64748b;
    --pos-border: #e2e8f0;
    --pos-radius: 16px;
    --pos-shadow: 0 4px 12px rgba(0,0,0,0.06);
    --pos-transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Main Container */
.pos-container {
    height: 100vh;
    display: flex;
    overflow: hidden;
    background: #f1f5f9;
    color: var(--pos-text);
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

/* Left Panel - Products */
.pos-left {
    flex: 6.5;
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
    background: #f8fafc;
    overflow: hidden;
}

/* Right Panel - Cart & Checkout */
.pos-right {
    flex: 3.5;
    display: flex;
    flex-direction: column;
    background: #ffffff;
    border-left: 1px solid var(--pos-border);
    box-shadow: -4px 0 20px rgba(0,0,0,0.05);
}

/* ===== Search Bar ===== */
.pos-search-wrapper {
    max-width: 55%;
    flex-grow: 1;
    position: relative;
}

.pos-search-input {
    padding-left: 90px !important;
    padding-right: 20px !important;
    background: #ffffff !important;
    background-image: linear-gradient(90deg, transparent 0%, transparent 100%),
        repeating-linear-gradient(90deg, #cbd5e1 0px, #cbd5e1 2px, transparent 2px, transparent 4px, #cbd5e1 4px, #cbd5e1 5px, transparent 5px, transparent 8px, #cbd5e1 8px, #cbd5e1 11px, transparent 11px, transparent 13px, #cbd5e1 13px, #cbd5e1 14px, transparent 14px, transparent 17px, #cbd5e1 17px, #cbd5e1 19px, transparent 19px, transparent 22px) !important;
    background-position: left center, left center !important;
    background-size: auto auto, 80px 28px !important;
    background-repeat: no-repeat, no-repeat !important;
    background-origin: padding-box, padding-box !important;
    border: 2px solid var(--pos-border) !important;
    border-radius: 12px !important;
    color: var(--pos-text) !important;
    height: 50px !important;
    font-size: 15px !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04) !important;
    transition: var(--pos-transition) !important;
}

.pos-search-input:focus {
    background-image: linear-gradient(90deg, transparent 0%, transparent 100%),
        repeating-linear-gradient(90deg, #94a3b8 0px, #94a3b8 2px, transparent 2px, transparent 4px, #94a3b8 4px, #94a3b8 5px, transparent 5px, transparent 8px, #94a3b8 8px, #94a3b8 11px, transparent 11px, transparent 13px, #94a3b8 13px, #94a3b8 14px, transparent 14px, transparent 17px, #94a3b8 17px, #94a3b8 19px, transparent 19px, transparent 22px) !important;
    border-color: var(--pos-primary) !important;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12) !important;
    outline: none !important;
}

.pos-search-input::placeholder {
    color: var(--pos-text-muted) !important;
}

/* ===== Categories Ribbon ===== */
.pos-categories {
    display: flex;
    overflow-x: auto;
    padding-bottom: 12px;
    margin-bottom: 16px;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 transparent;
    gap: 8px;
}

.pos-categories::-webkit-scrollbar {
    height: 5px;
}

.pos-categories::-webkit-scrollbar-thumb {
    background-color: #cbd5e1;
    border-radius: 10px;
}

.category-btn {
    white-space: nowrap;
    padding: 10px 22px;
    border-radius: 30px;
    background: #ffffff;
    border: 2px solid var(--pos-border);
    color: var(--pos-text-muted);
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: var(--pos-transition);
    user-select: none;
}

.category-btn:hover {
    background: var(--pos-surface-light);
    color: var(--pos-text);
    border-color: var(--pos-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.1);
}

.category-btn.active {
    background: linear-gradient(135deg, var(--pos-primary) 0%, var(--pos-primary-dark) 100%);
    color: white;
    border-color: var(--pos-primary);
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
}

/* ===== Products Grid ===== */
.pos-products {
    flex: 1;
    overflow-y: auto;
    padding-right: 8px;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 transparent;
}

.pos-products::-webkit-scrollbar {
    width: 6px;
}

.pos-products::-webkit-scrollbar-thumb {
    background-color: #cbd5e1;
    border-radius: 10px;
}

/* Product grid - custom CSS grid for bigger cards */
.pos-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
    padding-bottom: 10px;
}

.pos-item-card {
    background: #ffffff;
    border-radius: var(--pos-radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--pos-transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border: 2px solid var(--pos-border);
    overflow: hidden;
    position: relative;
    min-height: 200px;
}

.pos-item-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--pos-primary), var(--pos-accent));
    opacity: 0;
    transition: var(--pos-transition);
}

.pos-item-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.1);
    border-color: var(--pos-primary-light);
}

.pos-item-card:hover::before {
    opacity: 1;
}

.pos-item-card:active {
    transform: scale(0.97);
}

.pos-item-icon {
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    color: white;
    border-radius: 12px;
    margin-bottom: 12px;
    width: 100%;
    text-shadow: 0 2px 4px rgba(0,0,0,0.15);
    position: relative;
    overflow: hidden;
}

.pos-item-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    pointer-events: none;
}

.pos-item-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--pos-text);
    margin-bottom: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.3;
    min-height: 39px;
}

.pos-item-price {
    font-size: 18px;
    font-weight: 800;
    color: var(--pos-primary);
}

.pos-item-stock {
    font-size: 12px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 4px;
}

.pos-item-stock.in-stock {
    background: #dcfce7;
    color: #16a34a;
}

.pos-item-stock.low-stock {
    background: #fef3c7;
    color: #d97706;
}

.pos-item-stock.out-of-stock {
    background: #fee2e2;
    color: #dc2626;
}

.pos-item-stock.neg-stock {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fca5a5;
}

.pos-item-info-btn {
    border: none;
    border-radius: 50%;
    background: #e2e8f0;
    color: #475569;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 13px;
    width: 22px;
    height: 22px;
    margin-top: 4px;
    transition: var(--pos-transition);
    padding: 0;
}

.pos-item-info-btn:hover {
    background: #1565c0;
    color: white;
}

.pos-item-promo {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 4px;
    background: linear-gradient(135deg, #6366f1, #4f46e5);
    color: white;
}

/* ===== Cart Area ===== */
.cart-header {
    padding: 1.1rem;
    border-bottom: 1px solid var(--pos-border);
    background: #f8fafc;
}

.customer-dropdown-item:hover {
    background: #f1f5f9;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    margin: 0;
    list-style: none;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 transparent;
}

.cart-items::-webkit-scrollbar {
    width: 5px;
}

.cart-items::-webkit-scrollbar-thumb {
    background-color: #cbd5e1;
    border-radius: 10px;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid #f1f5f9;
    cursor: pointer;
    transition: var(--pos-transition);
    position: relative;
}

.cart-item:hover {
    background: #f8fafc;
}

.cart-item.selected-item {
    background: rgba(79, 70, 229, 0.06);
    border-left: 4px solid var(--pos-primary);
    padding-left: 14px;
}

.cart-item-info {
    flex: 1;
}

.cart-item-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--pos-text);
    margin-bottom: 2px;
}

.cart-item-price {
    font-size: 13px;
    color: var(--pos-text-muted);
}

.cart-unit-select {
    font-size: 11px;
    border: 1px solid var(--pos-border);
    border-radius: 6px;
    padding: 1px 4px;
    color: var(--pos-text);
    background: #f8fafc;
    margin-left: 4px;
    cursor: pointer;
}

.cart-qty-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    background: #f1f5f9;
    border-radius: 8px;
    padding: 2px;
}

.cart-qty-btn {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: var(--pos-transition);
    padding: 0;
    line-height: 1;
}

.cart-qty-minus {
    background: #fee2e2;
    color: #dc2626;
}

.cart-qty-minus:hover {
    background: #fecaca;
}

.cart-qty-plus {
    background: #d1fae5;
    color: #059669;
}

.cart-qty-plus:hover {
    background: #a7f3d0;
}

.cart-qty-input {
    width: 42px;
    text-align: center;
    font-weight: 600;
    font-size: 13px;
    color: var(--pos-text);
    border: none;
    background: transparent;
    outline: none;
    -moz-appearance: textfield;
}

.cart-qty-input::-webkit-outer-spin-button,
.cart-qty-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.item-total {
    font-weight: 700;
    font-size: 15px;
    width: 75px;
    text-align: right;
    color: var(--pos-primary);
}

.remove-item {
    color: var(--pos-danger);
    cursor: pointer;
    font-size: 20px;
    transition: var(--pos-transition);
    opacity: 0.5;
}

.remove-item:hover {
    opacity: 1;
    transform: scale(1.2);
}

/* ===== Cart Summary ===== */
.cart-summary {
    background: #f8fafc;
    padding: 16px 18px;
    border-top: 1px solid var(--pos-border);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--pos-text-muted);
}

.summary-total {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    padding-top: 12px;
    border-top: 2px dashed var(--pos-border);
    font-size: 26px;
    font-weight: 800;
    color: var(--pos-success);
}

/* ===== Numpad ===== */
.persistent-numpad-container {
    background: #ffffff;
    padding: 12px 16px;
    border-top: 1px solid var(--pos-border);
}

.numpad-display {
    background: #f8fafc;
    border: 1px solid var(--pos-border);
    border-radius: 10px;
    padding: 6px 16px;
    margin-bottom: 10px;
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.numpad-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.numpad-btn {
    background: #f1f5f9;
    color: var(--pos-text);
    border: 1px solid var(--pos-border);
    border-radius: 10px;
    padding: 14px 0;
    font-size: 22px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 2px 0 #cbd5e1;
    transition: all 0.08s ease;
    user-select: none;
}

.numpad-btn:hover {
    background: #e2e8f0;
}

.numpad-btn:active {
    transform: translateY(2px);
    box-shadow: none;
    background: var(--pos-primary);
    color: white;
}

/* ===== Payment Buttons ===== */
.payment-actions {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
    padding: 14px 16px;
    background: #f8fafc;
    border-top: 1px solid var(--pos-border);
}

.btn-pay {
    padding: 22px 10px;
    font-size: 15px;
    font-weight: 700;
    border-radius: var(--pos-radius);
    cursor: pointer;
    border: none;
    transition: var(--pos-transition);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.btn-pay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.btn-pay:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(0,0,0,0.12);
}

.btn-pay:active:not(:disabled) {
    transform: translateY(2px);
    box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}

.btn-pay:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

.btn-pay-cash {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-pay-card {
    background: linear-gradient(135deg, #4f46e5 0%, #3730a3 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.btn-pay-multi {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.2);
}

/* ===== Modal Numpad ===== */
.modal-numpad-btn {
    border: 1px solid var(--pos-border);
    background: #f1f5f9;
    color: var(--pos-text);
    border-radius: 14px;
    height: 54px;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    transition: var(--pos-transition);
    cursor: pointer;
}

.modal-numpad-btn:hover {
    background: #e2e8f0;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.modal-numpad-btn:active {
    transform: translateY(1px);
    box-shadow: none;
}

.modal-numpad-btn.btn-c {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border: none;
}

.modal-numpad-btn.btn-c:hover {
    background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .pos-product-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}

@media (max-width: 768px) {
    .pos-container {
        flex-direction: column;
    }
    .pos-left { flex: 1; }
    .pos-right { flex: 1; border-left: none; border-top: 1px solid var(--pos-border); }
    .pos-product-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
}