/* ============================================
   HosiO POS - Brown / Gray / White Theme
   Optimized: iPad landscape, portrait, phone
   Border radius: 4–5px | Speed-first UX
   ============================================ */

:root {
    /* Brown */
    --brown-900: #3d3429;
    --brown-700: #5D4E37;
    --brown-600: #6F5B42;
    --brown-500: #8B7355;
    --brown-400: #A0826D;
    --brown-200: #D4C4B0;
    --brown-100: #EDE6DD;
    /* Gray */
    --gray-800: #2d2d2d;
    --gray-700: #4A4A4A;
    --gray-600: #6B6B6B;
    --gray-500: #9E9E9E;
    --gray-300: #D1D1D1;
    --gray-200: #E8E8E8;
    --gray-100: #F5F5F5;
    /* White & surface */
    --white: #FFFFFF;
    --surface: #FAFAFA;
    /* UI */
    --radius-sm: 4px;
    --radius: 5px;
    --shadow-sm: 0 1px 3px rgba(61, 52, 41, 0.08);
    --shadow: 0 2px 8px rgba(61, 52, 41, 0.1);
    --shadow-md: 0 4px 12px rgba(61, 52, 41, 0.12);
    --transition: 0.15s ease;
    --transition-fast: 0.1s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Sarabun', system-ui, sans-serif;
    background: linear-gradient(160deg, var(--gray-100) 0%, var(--brown-100) 50%, var(--gray-200) 100%);
    min-height: 100vh;
    padding: 12px;
    color: var(--gray-800);
    -webkit-tap-highlight-color: transparent;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* ----- Header ----- */
header {
    background: linear-gradient(135deg, var(--brown-700) 0%, var(--brown-600) 100%);
    color: var(--white);
    padding: 14px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

header h1 {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

.nav-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-buttons a {
    color: rgba(255,255,255,0.95);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: background var(--transition-fast), transform var(--transition-fast);
    background: rgba(255, 255, 255, 0.12);
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-buttons a:hover {
    background: rgba(255, 255, 255, 0.22);
}

.nav-buttons a:active {
    transform: scale(0.98);
}

.nav-buttons a.active {
    background: var(--white);
    color: var(--brown-700);
    font-weight: 600;
    border-color: var(--white);
}

/* ----- Main layout ----- */
main {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 20px;
    padding: 20px;
    min-height: calc(100vh - 120px);
}

.admin-main {
    grid-template-columns: 1fr;
}

/* ----- Section header ----- */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.section-header h2 {
    font-size: 1.15rem;
    color: var(--gray-800);
    font-weight: 600;
    margin: 0;
}

.search-box {
    padding: 10px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.95rem;
    width: 260px;
    max-width: 100%;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    background: var(--white);
}

.search-box:focus {
    outline: none;
    border-color: var(--brown-500);
    box-shadow: 0 0 0 3px rgba(93, 78, 55, 0.12);
}

.search-box::placeholder {
    color: var(--gray-500);
}

/* ----- Products ----- */
.products-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
    overflow-y: auto;
    max-height: calc(100vh - 320px);
    padding: 4px;
    scrollbar-width: 6px;
}

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

.products-grid::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

.products-grid::-webkit-scrollbar-thumb {
    background: var(--brown-400);
    border-radius: var(--radius-sm);
}

.products-grid::-webkit-scrollbar-thumb:hover {
    background: var(--brown-500);
}

.product-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.product-card:hover {
    border-color: var(--brown-400);
    box-shadow: var(--shadow);
}

.product-card:active {
    transform: scale(0.99);
}

.product-image {
    width: 100%;
    height: 140px;
    overflow: hidden;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.2s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.03);
}

.placeholder-image {
    color: var(--gray-500);
    font-size: 0.8rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
}

.product-info {
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.product-info h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 6px;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.product-description {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin-bottom: 10px;
    line-height: 1.45;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    gap: 10px;
}

.product-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--brown-600);
    letter-spacing: -0.02em;
}

.add-to-cart {
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
    color: var(--white);
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background var(--transition), transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.add-to-cart:hover {
    background: linear-gradient(135deg, var(--brown-500) 0%, var(--brown-600) 100%);
}

.add-to-cart:active {
    transform: scale(0.97);
}

/* ----- Cart (ชัดเจน เข้าใจง่าย) ----- */
.cart-section {
    background: var(--white);
    border-radius: var(--radius);
    padding: 0;
    display: flex;
    flex-direction: column;
    height: fit-content;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.cart-header {
    padding: 12px 14px;
    border-bottom: 2px solid var(--gray-200);
    background: var(--gray-100);
    border-radius: var(--radius) var(--radius) 0 0;
}

.cart-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 0 0 2px 0;
    letter-spacing: 0.02em;
}

.cart-desc {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin: 0;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    max-height: calc(100vh - 360px);
    padding: 0;
    scrollbar-width: 5px;
}

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

.cart-items::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

.cart-items::-webkit-scrollbar-thumb {
    background: var(--brown-400);
    border-radius: var(--radius-sm);
}

/* หัวคอลัมน์รายการ */
.cart-list-header {
    display: grid;
    grid-template-columns: 1fr auto auto auto;
    align-items: center;
    gap: 10px 12px;
    padding: 8px 14px;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-300);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.cart-col-qty { text-align: center; min-width: 90px; }
.cart-col-total { text-align: right; min-width: 64px; }
.cart-col-action { width: 32px; }

.empty-cart {
    text-align: center;
    color: var(--gray-500);
    padding: 28px 16px;
    font-size: 0.9rem;
    margin: 0;
    background: transparent;
    border: none;
}

.cart-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto auto;
    align-items: start;
    gap: 10px 12px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--white);
    transition: background var(--transition-fast);
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-item:hover {
    background: var(--gray-100);
}

.item-info {
    min-width: 0;
}

/* ชื่อรายการให้แสดงเต็ม อ่านชัด ไม่ตัดด้วย ... */
.item-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0 0 4px 0;
    line-height: 1.4;
    white-space: normal;
    word-break: break-word;
}

.item-price {
    font-size: 0.8rem;
    color: var(--brown-600);
    font-weight: 600;
    margin: 0;
}

.item-price-unit {
    font-weight: 400;
    color: var(--gray-500);
    font-size: 0.75rem;
}

.item-quantity {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
    min-width: 90px;
    justify-content: center;
    align-self: center;
}

.qty-btn {
    width: 30px;
    height: 30px;
    min-width: 30px;
    min-height: 30px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.qty-btn:hover {
    background: var(--brown-500);
    color: var(--white);
    border-color: var(--brown-500);
}

.qty-btn:active {
    transform: scale(0.92);
}

.qty-input {
    width: 44px;
    height: 30px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-800);
    transition: border-color var(--transition);
}

.qty-input:focus {
    outline: none;
    border-color: var(--brown-500);
}

.item-subtotal {
    text-align: right;
    min-width: 64px;
    flex-shrink: 0;
    align-self: center;
}

.item-subtotal-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-800);
}

.remove-btn {
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    background: var(--gray-100);
    color: var(--gray-500);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    flex-shrink: 0;
    align-self: center;
}

.remove-btn:hover {
    background: #c0392b;
    color: var(--white);
    border-color: #c0392b;
}

.remove-btn:active {
    transform: scale(0.92);
}

/* บล็อกรวม + ปุ่มชำระ */
.cart-summary {
    padding: 14px;
    border-top: 2px solid var(--gray-300);
    background: var(--gray-100);
    border-radius: 0 0 var(--radius) var(--radius);
}

.cart-total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.cart-total-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-700);
}

.cart-total-amount {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--brown-600);
    letter-spacing: -0.02em;
}

.checkout-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
    color: var(--white);
    border: none;
    padding: 12px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: background var(--transition), transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.checkout-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--brown-500) 0%, var(--brown-600) 100%);
}

.checkout-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.checkout-btn:disabled {
    background: var(--gray-500);
    cursor: not-allowed;
    opacity: 0.7;
}

/* ----- Modals ----- */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(45, 45, 45, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--white);
    margin: 5% auto;
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(61, 52, 41, 0.2);
    max-width: 520px;
    width: 92%;
    animation: slideDown 0.2s ease;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes slideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--brown-700) 0%, var(--brown-600) 100%);
    border-radius: var(--radius) var(--radius) 0 0;
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin: 0;
}

.close {
    font-size: 1.5rem;
    cursor: pointer;
    color: rgba(255,255,255,0.9);
    font-weight: 300;
    line-height: 1;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.close:hover {
    opacity: 1;
}

.close:active {
    transform: scale(0.9);
}

.modal-body {
    padding: 20px;
}

/* Payment modal – แค่ที่จำเป็น กระชับมาก */
#paymentModal .modal-content {
    max-width: 340px;
}

#paymentModal .modal-header {
    padding: 8px 12px;
}

#paymentModal .modal-header h2 {
    font-size: 0.95rem;
}

#paymentModal .modal-body {
    padding: 12px;
}

#paymentModal .payment-details {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#paymentModal .amount-display {
    text-align: center;
    padding: 10px 12px;
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
    border-radius: var(--radius);
    color: var(--white);
}

#paymentModal .amount-display h3 {
    display: none;
}

#paymentModal .amount {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.02em;
}

#paymentModal .bank-info {
    padding: 0;
}

#paymentModal .bank-info h3 {
    display: none;
}

#paymentModal .payment-bank-line {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin: 0 0 2px 0;
    line-height: 1.35;
}

#paymentModal .payment-bank-label {
    color: var(--gray-500);
    margin-right: 4px;
}

#paymentModal .payment-error {
    font-size: 0.8rem;
    color: #c0392b;
    text-align: center;
    margin: 0;
    padding: 8px;
}

#paymentModal .qr-code {
    text-align: center;
    padding: 8px 10px;
    background: var(--gray-100);
    border-radius: var(--radius);
}

#paymentModal .payment-qr-hint {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin: 0 0 6px 0;
}

#paymentModal .qr-image {
    max-width: 180px;
    width: 100%;
    height: auto;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
}

#paymentModal .payment-actions {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

#paymentModal .confirm-btn {
    flex: 2;
    padding: 10px 14px;
    font-size: 0.9rem;
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 700;
    transition: background var(--transition), transform var(--transition-fast);
}

#paymentModal .cancel-btn {
    flex: 1;
    padding: 10px 12px;
    font-size: 0.85rem;
    background: var(--gray-600);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition), transform var(--transition-fast);
}

#paymentModal .confirm-btn:hover {
    background: linear-gradient(135deg, var(--brown-500) 0%, var(--brown-600) 100%);
}

#paymentModal .confirm-btn:active,
#paymentModal .cancel-btn:active {
    transform: scale(0.98);
}

#paymentModal .cancel-btn:hover {
    background: var(--gray-700);
}

/* Success modal */
.success-modal {
    max-width: 380px;
}

.success-modal .modal-header {
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
}

.success-icon {
    width: 64px;
    height: 64px;
    background: var(--brown-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--brown-600);
    margin: 0 auto 16px;
    animation: scaleIn 0.2s ease;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.success-modal p {
    font-size: 0.95rem;
    color: var(--gray-600);
    text-align: center;
    margin: 10px 0;
    line-height: 1.5;
}

.success-modal strong {
    color: var(--brown-600);
    font-weight: 700;
    font-size: 1rem;
}

.close-success-btn {
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
    color: var(--white);
    border: none;
    padding: 10px 28px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: transform var(--transition-fast);
    margin: 16px auto 0;
    display: block;
}

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

/* ----- Admin ----- */
.admin-nav {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: var(--gray-100);
    padding: 12px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.admin-tab {
    padding: 10px 20px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-600);
    transition: background var(--transition), border-color var(--transition), color var(--transition);
    flex: 1;
    text-align: center;
}

.admin-tab:hover {
    background: var(--gray-100);
    border-color: var(--brown-400);
    color: var(--brown-600);
}

.admin-tab.active {
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
    color: var(--white);
    border-color: var(--brown-600);
}

.admin-tab-content {
    display: none;
    animation: fadeIn 0.2s ease;
}

.admin-tab-content.active {
    display: block;
}

/* Admin: รายการแนวนอน (ไม่ใหญ่แบบหน้าขาย) */
.admin-products-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-top: 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--white);
}

.admin-products-grid .admin-product-row {
    display: grid;
    grid-template-columns: 48px 1fr auto auto auto;
    align-items: center;
    gap: 12px 16px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--white);
    transition: background var(--transition-fast);
}

.admin-products-grid .admin-product-row:last-child {
    border-bottom: none;
}

.admin-products-grid .admin-product-row:hover {
    background: var(--gray-100);
}

.admin-product-thumb {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
}

.admin-product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.admin-product-thumb .admin-no-img {
    font-size: 0.85rem;
    color: var(--gray-400);
}

.admin-product-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-800);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.admin-product-price {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--brown-600);
    white-space: nowrap;
}

.admin-product-stock {
    font-size: 0.8rem;
    color: var(--gray-600);
    white-space: nowrap;
}

.admin-products-grid .admin-product-actions {
    display: flex;
    gap: 6px;
    margin: 0;
}

/* Form: อัพโหลดรูป + URL */
.form-group-image .image-upload-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.image-upload-btn {
    cursor: pointer;
    display: inline-block;
}

.image-upload-label {
    display: inline-block;
    padding: 8px 14px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-700);
    transition: background var(--transition), border-color var(--transition);
}

.image-upload-btn:hover .image-upload-label {
    background: var(--gray-200);
    border-color: var(--brown-400);
}

.image-upload-or {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.image-url-input {
    flex: 1;
    min-width: 140px;
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.image-preview {
    margin-top: 10px;
    max-width: 120px;
    max-height: 120px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    background: var(--gray-100);
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.admin-product-actions {
    display: flex;
    gap: 8px;
}

.btn-edit {
    flex: 1;
    background: var(--brown-200);
    color: var(--brown-900);
    border: 1px solid var(--brown-400);
    padding: 8px 14px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: background var(--transition), transform var(--transition-fast);
}

.btn-edit:hover {
    background: var(--brown-400);
    color: var(--white);
}

.btn-edit:active {
    transform: scale(0.97);
}

.btn-delete {
    flex: 1;
    background: #c0392b;
    color: var(--white);
    border: none;
    padding: 8px 14px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: background var(--transition), transform var(--transition-fast);
}

.btn-delete:hover {
    background: #a53226;
}

.btn-delete:active {
    transform: scale(0.97);
}

/* สรุปรายการขาย */
.sales-summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.sales-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    box-shadow: var(--shadow-sm);
}

.sales-card-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.sales-card-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--brown-600);
    letter-spacing: -0.02em;
}

.sales-list-wrap {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--white);
}

.sales-list-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    margin: 0;
    padding: 10px 14px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-100);
}

.sales-orders-list {
    max-height: 400px;
    overflow-y: auto;
}

.sales-orders-header {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: 12px 16px;
    padding: 8px 14px;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-300);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.sales-order-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: 12px 16px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.9rem;
    align-items: center;
    transition: background var(--transition-fast);
}

.sales-order-row:last-child {
    border-bottom: none;
}

.sales-order-row:hover {
    background: var(--gray-100);
}

.sales-col-num {
    font-weight: 600;
    color: var(--gray-800);
}

.sales-col-date {
    color: var(--gray-600);
    font-size: 0.85rem;
}

.sales-col-amount {
    font-weight: 700;
    color: var(--brown-600);
    text-align: right;
}

.sales-col-status {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-600);
}

.sales-no-orders {
    text-align: center;
    color: var(--gray-500);
    padding: 32px 16px;
    font-size: 0.9rem;
    margin: 0;
}

.btn-refresh {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.no-products {
    text-align: center;
    color: var(--gray-600);
    padding: 48px 24px;
    font-size: 0.95rem;
    background: var(--gray-100);
    border-radius: var(--radius);
    border: 1px dashed var(--gray-300);
}

/* ----- Forms ----- */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--brown-500);
    box-shadow: 0 0 0 3px rgba(93, 78, 55, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group small {
    display: block;
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.btn-primary {
    flex: 1;
    background: linear-gradient(135deg, var(--brown-600) 0%, var(--brown-700) 100%);
    color: var(--white);
    border: none;
    padding: 12px 20px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background var(--transition), transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--brown-500) 0%, var(--brown-600) 100%);
}

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

.btn-secondary {
    flex: 1;
    background: var(--gray-600);
    color: var(--white);
    border: none;
    padding: 12px 20px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: background var(--transition), transform var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--gray-700);
}

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

/* Bank settings */
.bank-settings-form {
    background: var(--gray-100);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    margin-bottom: 20px;
}

.info-box {
    background: var(--brown-100);
    padding: 14px 16px;
    border-radius: var(--radius);
    border-left: 4px solid var(--brown-500);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.info-box p {
    margin: 0;
    color: var(--brown-900);
    font-size: 0.9rem;
    line-height: 1.5;
}

.bank-preview {
    background: var(--white);
    border: 1px solid var(--brown-400);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow-sm);
}

.bank-preview h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0 0 12px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--brown-400);
}

.bank-info-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bank-info-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin: 0;
    line-height: 1.5;
}

/* Product modal */
#productModal {
    display: none;
}

#productModal .modal-content {
    max-width: 480px;
}

#productModal .modal-body {
    padding: 20px;
}

#productModal .modal-header {
    background: linear-gradient(135deg, var(--brown-700) 0%, var(--brown-600) 100%);
}

/* ----- Loading ----- */
.loading {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--brown-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ----- Toast ----- */
.toast {
    position: fixed;
    top: 14px;
    right: 14px;
    background: var(--white);
    padding: 12px 18px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    z-index: 9999;
    animation: slideIn 0.2s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--gray-200);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--brown-600);
}

.toast.error {
    border-left: 4px solid #c0392b;
}

.toast.info {
    border-left: 4px solid var(--brown-500);
}

/* ----- Accessibility ----- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--brown-500);
    outline-offset: 2px;
}

/* ============================================
   RESPONSIVE: iPad landscape (1024px)
   ============================================ */
@media (max-width: 1024px) {
    body {
        padding: 10px;
    }

    main {
        grid-template-columns: 1fr 300px;
        padding: 16px;
        gap: 16px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 12px;
        max-height: calc(100vh - 300px);
    }

    .product-image {
        height: 120px;
    }

    .admin-products-grid .admin-product-row {
        gap: 10px 12px;
        padding: 6px 10px;
    }
    .admin-product-thumb {
        width: 44px;
        height: 44px;
    }

    .cart-section {
        padding: 14px;
    }

    .cart-items {
        max-height: calc(100vh - 360px);
    }
}

/* ============================================
   RESPONSIVE: iPad portrait (768px)
   ============================================ */
@media (max-width: 768px) {
    body {
        padding: 8px;
    }

    .container {
        border-radius: var(--radius);
    }

    header {
        padding: 12px 16px;
    }

    header h1 {
        font-size: 1.2rem;
    }

    .nav-buttons a {
        padding: 10px 14px;
        font-size: 0.85rem;
    }

    main {
        grid-template-columns: 1fr;
        padding: 14px;
        gap: 14px;
    }

    .cart-section {
        position: sticky;
        bottom: 12px;
        z-index: 100;
        box-shadow: var(--shadow-md);
        max-height: 45vh;
        display: flex;
        flex-direction: column;
    }

    .cart-title {
        font-size: 0.95rem;
    }

    .cart-items {
        flex: 1;
        min-height: 100px;
        max-height: 28vh;
    }

    .section-header {
        margin-bottom: 12px;
    }

    .section-header h2 {
        font-size: 1.05rem;
    }

    .search-box {
        width: 100%;
        padding: 10px 14px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 10px;
        max-height: calc(100vh - 280px);
    }

    .product-card {
        max-width: 100%;
    }

    .product-image {
        height: 100px;
    }

    .product-info {
        padding: 10px 12px;
    }

    .product-info h3 {
        font-size: 0.85rem;
    }

    .product-price {
        font-size: 1rem;
    }

    .add-to-cart {
        padding: 10px 14px;
        font-size: 0.85rem;
        min-height: 44px;
    }

    .admin-nav {
        flex-direction: row;
        gap: 8px;
        padding: 10px;
    }

    .admin-tab {
        padding: 12px 16px;
        font-size: 0.85rem;
        min-height: 44px;
    }

    .admin-products-grid .admin-product-row {
        grid-template-columns: 44px 1fr auto auto;
        gap: 8px 12px;
        padding: 8px 10px;
    }
    .admin-product-stock {
        display: none;
    }
    .admin-product-thumb {
        width: 40px;
        height: 40px;
    }

    .sales-summary-cards {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .sales-card-value {
        font-size: 1.2rem;
    }
    .sales-orders-header,
    .sales-order-row {
        grid-template-columns: 1fr auto auto;
        gap: 8px 12px;
    }
    .sales-col-date {
        display: none;
    }

    .cart-item {
        padding: 8px 10px;
        gap: 8px 10px;
    }

    .item-name {
        font-size: 0.9rem;
    }

    .qty-btn,
    .remove-btn {
        min-width: 40px;
        min-height: 40px;
        width: 40px;
        height: 40px;
    }

    .qty-input {
        height: 40px;
        width: 44px;
        font-size: 0.9rem;
    }

    .checkout-btn {
        padding: 14px 16px;
        font-size: 1rem;
        min-height: 46px;
    }

    .modal-content {
        margin: 8% auto;
        width: 94%;
        max-height: 85vh;
    }

    .modal-body {
        padding: 16px;
    }

    .modal-header {
        padding: 12px 16px;
    }

    .modal-header h2 {
        font-size: 1rem;
    }

    .amount {
        font-size: 1.6rem;
    }

    .form-group input,
    .form-group textarea {
        padding: 12px 14px;
        font-size: 16px;
        min-height: 44px;
    }

    .form-actions {
        flex-direction: row;
        gap: 10px;
    }

    .form-actions button {
        min-height: 44px;
    }
}

/* ============================================
   RESPONSIVE: Phone (480px)
   ============================================ */
@media (max-width: 480px) {
    body {
        padding: 6px;
    }

    header {
        flex-direction: column;
        align-items: stretch;
        padding: 10px 12px;
    }

    header h1 {
        font-size: 1.1rem;
        text-align: center;
    }

    .nav-buttons {
        justify-content: center;
        gap: 8px;
    }

    .nav-buttons a {
        flex: 1;
        text-align: center;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    main {
        padding: 10px;
        gap: 10px;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        max-height: calc(100vh - 260px);
    }

    .product-image {
        height: 90px;
    }

    .product-info h3 {
        -webkit-line-clamp: 1;
        line-clamp: 1;
    }

    .product-description {
        display: none;
    }

    .product-footer {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .add-to-cart {
        width: 100%;
        min-height: 44px;
    }

    .cart-section {
        bottom: 8px;
        max-height: 42vh;
    }

    .cart-header {
        padding: 8px 10px;
    }

    .cart-title {
        font-size: 0.9rem;
        margin-bottom: 0;
    }

    .cart-desc {
        display: none;
    }

    .cart-list-header {
        padding: 6px 10px;
        font-size: 0.7rem;
    }

    .cart-items {
        max-height: 22vh;
    }

    .cart-item {
        grid-template-columns: 1fr auto auto auto;
        padding: 8px 10px;
        gap: 6px 10px;
    }

    .item-name {
        font-size: 0.85rem;
    }

    .item-subtotal-value {
        font-size: 0.9rem;
    }

    .admin-products-grid .admin-product-row {
        grid-template-columns: 36px 1fr auto;
        gap: 6px 10px;
        padding: 6px 8px;
    }
    .admin-product-price {
        display: none;
    }
    .admin-product-thumb {
        width: 36px;
        height: 36px;
    }
    .admin-product-name {
        font-size: 0.85rem;
    }
    .admin-products-grid .btn-edit,
    .admin-products-grid .btn-delete {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .sales-summary-cards {
        grid-template-columns: 1fr;
    }
    .sales-orders-header,
    .sales-order-row {
        grid-template-columns: 1fr auto;
        font-size: 0.85rem;
        padding: 8px 10px;
    }
    .sales-col-date,
    .sales-col-status {
        display: none;
    }

    .admin-nav {
        flex-direction: column;
    }

    .admin-tab {
        min-height: 44px;
    }

    .payment-actions {
        flex-direction: column;
    }

    .confirm-btn,
    .cancel-btn {
        min-height: 48px;
    }

    #paymentModal .modal-content {
        width: 96%;
        max-width: 320px;
    }

    #paymentModal .qr-image {
        max-width: 200px;
    }

    .modal-content {
        margin: 5% auto;
        width: 96%;
    }
}

/* ----- Print ----- */
@media print {
    body {
        background: var(--white);
    }

    .container {
        box-shadow: none;
    }

    header,
    .cart-section,
    .admin-nav {
        display: none;
    }

    main {
        padding: 0;
    }

    .modal {
        display: none !important;
    }
}