/* ============================================================
   POS.CSS — Point-of-Sale Page Layout, Cart Drawer, Receipt
   ============================================================ */

/* ── POS Page Layout ───────────────────────────────────────── */
.pos-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 0;
  height: calc(100vh - var(--topbar-height));
  overflow: hidden;
}

/* ── POS Product Panel ─────────────────────────────────────── */
.pos-product-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: var(--space-5);
  gap: var(--space-4);
}

.pos-search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.pos-search-wrap {
  flex: 1;
  position: relative;
}

.pos-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 16px;
  height: 16px;
  pointer-events: none;
}

#pos-search {
  width: 100%;
  padding: 10px 12px 10px 38px;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
}

.pos-filter-pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: none;
}

.pos-filter-pills::-webkit-scrollbar { display: none; }

/* ── POS Product Grid ──────────────────────────────────────── */
.pos-product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-3);
  overflow-y: auto;
  padding-right: var(--space-1);
}

.pos-product-card {
  background: var(--surface);
  border: 2px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  user-select: none;
}

.pos-product-card:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(15 118 110 / 0.1);
  transform: translateY(-1px);
}

.pos-product-card:active {
  transform: scale(0.96);
  border-color: var(--primary-dark);
}

.pos-product-card.out-of-stock {
  opacity: 0.5;
  cursor: not-allowed;
}

.pos-product-card.out-of-stock:hover {
  border-color: var(--border-soft);
  box-shadow: none;
  transform: none;
}

.pos-card-image {
  width: 100%;
  aspect-ratio: 1;
  background: var(--canvas);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.pos-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pos-card-image .cat-icon {
  width: 40px;
  height: 40px;
  color: var(--border);
}

.pos-out-of-stock-overlay {
  position: absolute;
  inset: 0;
  background: rgb(255 255 255 / 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--danger);
}

.pos-card-body {
  padding: var(--space-2) var(--space-2) var(--space-2);
}

.pos-card-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}

.pos-card-price {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
}

.pos-card-stock {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 1px;
}

/* ── Cart Panel ────────────────────────────────────────────── */
.pos-cart-panel {
  background: var(--surface);
  border-left: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid var(--border-soft);
  flex-shrink: 0;
  background: var(--canvas);
}

.cart-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cart-count {
  background: var(--primary);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  min-width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 5px;
}

.cart-clear-btn {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--danger);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.cart-clear-btn:hover { background: var(--danger-bg); }

/* ── Cart Items ────────────────────────────────────────────── */
.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.cart-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--text-muted);
  padding: var(--space-8);
  text-align: center;
}

.cart-empty svg {
  width: 40px;
  height: 40px;
  opacity: 0.4;
}

.cart-empty p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.cart-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--surface-raised);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  animation: slideInUp var(--transition-fast) ease both;
}

.cart-item-thumb {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--canvas);
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-item-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cart-item-thumb svg { width: 20px; height: 20px; color: var(--border); }

.cart-item-info { flex: 1; min-width: 0; }

.cart-item-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cart-item-price-unit {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.cart-item-controls {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-1);
}

.cart-item-total {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.cart-qty-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.cart-qty-btn {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft);
  background: var(--surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.cart-qty-btn:hover { border-color: var(--primary); color: var(--primary); }

.cart-qty-btn.remove:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-bg);
}

.cart-qty-display {
  min-width: 28px;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ── Cart Summary ──────────────────────────────────────────── */
.cart-summary {
  border-top: 1px solid var(--border-soft);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-shrink: 0;
  background: var(--canvas);
}

.cart-summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
}

.cart-summary-label { color: var(--text-secondary); }
.cart-summary-value { font-weight: 600; color: var(--text-primary); font-family: var(--font-mono); }

.cart-summary-row.total {
  padding-top: var(--space-2);
  border-top: 2px solid var(--border);
}

.cart-summary-row.total .cart-summary-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.cart-summary-row.total .cart-summary-value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
}

/* Discount and Tax inputs */
.cart-discount-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cart-discount-input {
  width: 70px;
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.8125rem;
  text-align: right;
  font-family: var(--font-mono);
  font-weight: 600;
}

/* ── Payment Methods ───────────────────────────────────────── */
.payment-methods {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}

.payment-method-btn {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 2px solid var(--border-soft);
  background: var(--surface);
  cursor: pointer;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.payment-method-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-muted);
}

.payment-method-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-muted);
}

.payment-method-btn svg { width: 18px; height: 18px; }

/* ── Cash Change Calculator ────────────────────────────────── */
.change-calculator {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: none;
}

.change-calculator.visible { display: block; }

.change-calculator-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.change-calculator-row:last-child { margin-bottom: 0; }

.change-amount {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--stock-in);
  font-family: var(--font-mono);
}

.cash-tendered-input {
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-mono);
  text-align: right;
}

/* ── Checkout Button ───────────────────────────────────────── */
.checkout-btn {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: white;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  box-shadow: 0 2px 12px rgb(15 118 110 / 0.25);
  letter-spacing: 0.01em;
}

.checkout-btn:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 18px rgb(15 118 110 / 0.35);
  transform: translateY(-1px);
}

.checkout-btn:active { transform: scale(0.98); }

.checkout-btn:disabled {
  background: var(--border);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.checkout-btn svg { width: 18px; height: 18px; }

/* ── Receipt Modal ─────────────────────────────────────────── */
.receipt-modal {
  max-width: 420px;
}

.receipt-body {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-primary);
}

.receipt-store {
  text-align: center;
  margin-bottom: var(--space-4);
}

.receipt-store-name {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.receipt-store-sub { color: var(--text-muted); font-size: 0.75rem; }

.receipt-divider {
  border-top: 1px dashed var(--border);
  margin: var(--space-3) 0;
}

.receipt-item-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.receipt-item-name { flex: 1; }
.receipt-item-qty  { color: var(--text-secondary); min-width: 40px; text-align: right; }
.receipt-item-total { font-weight: 600; min-width: 70px; text-align: right; }

.receipt-total-section { margin-top: var(--space-3); }

.receipt-total-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-1);
}

.receipt-total-row.grand {
  font-size: 1rem;
  font-weight: 700;
  border-top: 2px solid var(--text-primary);
  padding-top: var(--space-2);
  margin-top: var(--space-2);
}

.receipt-footer {
  text-align: center;
  margin-top: var(--space-4);
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* ── POS Responsive ────────────────────────────────────────── */
@media (max-width: 900px) {
  .pos-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
    height: auto;
    min-height: calc(100vh - var(--topbar-height));
    overflow: auto;
  }

  .pos-product-panel {
    overflow: visible;
    padding: var(--space-3);
  }

  .pos-cart-panel {
    border-left: none;
    border-top: 1px solid var(--border-soft);
    max-height: none;
    position: sticky;
    bottom: 0;
    z-index: 50;
    background: var(--surface);
    box-shadow: 0 -4px 24px rgb(0 0 0 / 0.1);
  }

  .pos-product-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .cart-items {
    max-height: 40vh;
  }
}

@media (max-width: 480px) {
  .pos-product-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }

  .cart-qty-btn {
    min-width: 32px !important;
    min-height: 32px !important;
    font-size: 1.1rem !important;
  }

  .pos-product-panel {
    padding: var(--space-2);
    gap: var(--space-2);
  }

  .checkout-btn {
    padding: 12px;
    font-size: 0.9375rem;
  }
}