/* =============================================
   阿方專屬庫存管理系統 - 專業雜貨版
   CSS 主樣式
   ============================================= */

/* ---------- CSS Variables ---------- */
:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --primary-light: #eef1ff;
    --success: #2ec4b6;
    --success-dark: #25a99d;
    --success-light: #e8faf8;
    --warning: #ff9f1c;
    --warning-dark: #e68a00;
    --warning-light: #fff8eb;
    --danger: #e63946;
    --danger-dark: #cc2f3b;
    --danger-light: #fdebed;
    --purple: #7b2cbf;
    --purple-light: #f3ebfa;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #868e96;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius: 10px;
    --radius-sm: 6px;
    --transition: all 0.2s ease;
    --font: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html { font-size: 15px; }

body {
    font-family: var(--font);
    background: var(--gray-100);
    color: var(--gray-800);
    min-height: 100vh;
    line-height: 1.6;
}

/* ---------- Header ---------- */
.header {
    background: linear-gradient(135deg, var(--primary), #6c63ff);
    color: var(--white);
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-icon {
    font-size: 2rem;
    opacity: 0.9;
}

.header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.header-subtitle {
    font-size: 0.8rem;
    opacity: 0.8;
    font-weight: 300;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-date {
    font-size: 0.85rem;
    opacity: 0.85;
    background: rgba(255,255,255,0.15);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
}

/* ---------- Tab Navigation ---------- */
.tab-nav {
    display: flex;
    background: var(--white);
    border-bottom: 2px solid var(--gray-200);
    padding: 0 1.5rem;
    overflow-x: auto;
    position: sticky;
    top: 72px;
    z-index: 99;
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    padding: 1rem 1.5rem;
    border: none;
    background: transparent;
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

.tab-btn i {
    font-size: 1rem;
}

/* ---------- Main Content ---------- */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- Stats Row ---------- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--white);
    flex-shrink: 0;
}

.bg-blue { background: linear-gradient(135deg, var(--primary), #6c63ff); }
.bg-green { background: linear-gradient(135deg, var(--success), #38d9a9); }
.bg-red { background: linear-gradient(135deg, var(--danger), #ff6b6b); }
.bg-purple { background: linear-gradient(135deg, var(--purple), #9d4edd); }
.bg-orange { background: linear-gradient(135deg, #f76707, #ff922b); }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--gray-600);
    font-weight: 500;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
}

/* ---------- Card ---------- */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.card-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-header h2 i {
    color: var(--primary);
}

.card-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-body {
    padding: 1.5rem;
}

/* ---------- Forms ---------- */
.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: flex-start;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.form-group label i {
    color: var(--primary);
    font-size: 0.8rem;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group select {
    padding: 0.65rem 0.9rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.9rem;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-800);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67,97,238,0.15);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-style: italic;
}

.flex-1 { flex: 1; }
.flex-2 { flex: 2; }
.flex-3 { flex: 3; }
.flex-btn {
    flex: 0 0 auto;
    justify-content: flex-end;
}

.required-tag {
    background: var(--danger);
    color: var(--white);
    font-size: 0.65rem;
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    font-weight: 600;
}

.display-value {
    padding: 0.65rem 0.9rem;
    background: var(--gray-100);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    min-height: 42px;
    display: flex;
    align-items: center;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary {
    background: var(--primary);
    color: var(--white);
}
.btn-primary:hover { background: var(--primary-dark); box-shadow: var(--shadow); }

.btn-success {
    background: var(--success);
    color: var(--white);
}
.btn-success:hover { background: var(--success-dark); box-shadow: var(--shadow); }

.btn-warning {
    background: var(--warning);
    color: var(--white);
}
.btn-warning:hover { background: var(--warning-dark); box-shadow: var(--shadow); }

.btn-danger {
    background: var(--danger);
    color: var(--white);
}
.btn-danger:hover { background: var(--danger-dark); box-shadow: var(--shadow); }

.btn-outline {
    background: transparent;
    color: var(--gray-700);
    border: 1.5px solid var(--gray-300);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.75rem 1.8rem;
    font-size: 1rem;
}

.btn-toggle {
    background: transparent;
    border: 1.5px solid var(--gray-300);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--gray-600);
}

.btn-toggle:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

.btn-toggle.open {
    transform: rotate(180deg);
}

/* ---------- Search Box ---------- */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    color: var(--gray-500);
    font-size: 0.85rem;
}

.search-box input {
    padding: 0.5rem 0.75rem 0.5rem 2.2rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.85rem;
    width: 200px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67,97,238,0.15);
    width: 260px;
}

/* ---------- Data Table ---------- */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead th {
    background: var(--gray-50);
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.9rem;
    vertical-align: middle;
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: var(--gray-50);
}

/* ⚠️ 預警行 - 紅色背景 */
.data-table tbody tr.alert-row {
    background: var(--danger-light) !important;
    border-left: 4px solid var(--danger);
}

.data-table tbody tr.alert-row:hover {
    background: #fcd5d9 !important;
}

.empty-state {
    text-align: center;
    padding: 2.5rem 1rem !important;
    color: var(--gray-500);
    font-size: 0.95rem;
}

/* ---------- Status Badges ---------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    white-space: nowrap;
}

.badge-ok {
    background: var(--success-light);
    color: var(--success-dark);
}

.badge-alert {
    background: var(--danger-light);
    color: var(--danger);
    animation: pulse 2s infinite;
}

.badge-restock {
    background: var(--success-light);
    color: var(--success-dark);
}

.badge-increase {
    background: #e0f5e9;
    color: #1a7f37;
}

.badge-decrease {
    background: var(--danger-light);
    color: var(--danger);
}

.badge-sale {
    background: #fff3e0;
    color: #e65100;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Action buttons in table */
.action-btns {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.action-btns .btn {
    padding: 0.35rem 0.7rem;
    font-size: 0.78rem;
}

/* ---------- Restock Calc Box ---------- */
.restock-calc-box {
    background: linear-gradient(135deg, var(--primary-light), #e8f4fd);
    border: 2px dashed var(--primary);
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
}

.calc-result {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    color: var(--gray-700);
}

.calc-result i {
    color: var(--primary);
    font-size: 1.2rem;
}

.calc-result .highlight {
    color: var(--primary);
    font-size: 1.3rem;
    font-weight: 700;
}

/* ---------- Notice Box ---------- */
.notice-box {
    background: var(--warning-light);
    border-left: 4px solid var(--warning);
    padding: 0.8rem 1.2rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 1.2rem;
    font-size: 0.88rem;
    color: var(--gray-700);
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
}

.notice-box i {
    color: var(--warning);
    margin-top: 2px;
    flex-shrink: 0;
}

/* ---------- Filter Row ---------- */
.filter-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.2rem;
    padding-bottom: 1.2rem;
    border-bottom: 1px solid var(--gray-200);
}

.filter-row .form-group {
    min-width: 150px;
}

.filter-row .form-group select,
.filter-row .form-group input {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
}

/* ---------- Log Summary ---------- */
.log-summary {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.log-summary-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--gray-700);
    background: var(--gray-50);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
}

.log-summary-item strong {
    color: var(--primary);
    font-size: 1.1rem;
}

/* ---------- Pagination ---------- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.3rem;
    padding: 1rem 0;
}

.pagination button {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--gray-700);
}

.pagination button:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.pagination button.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination .page-info {
    padding: 0 0.8rem;
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* ---------- Modal ---------- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.2s ease;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-sm {
    max-width: 400px;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.modal-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-header h3 i { color: var(--primary); }

.modal-header-danger {
    background: var(--danger-light);
}

.modal-header-danger h3 i { color: var(--danger); }

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.modal-body {
    padding: 1.5rem;
}

.modal-body .form-group {
    margin-bottom: 1rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.text-muted {
    color: var(--gray-500);
    font-size: 0.85rem;
}

/* ---------- Toast ---------- */
.toast-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    min-width: 300px;
    max-width: 420px;
    padding: 0.9rem 1.2rem;
    border-radius: var(--radius-sm);
    color: var(--white);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.35s ease;
    cursor: pointer;
}

.toast.removing {
    animation: toastOut 0.3s ease forwards;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }
.toast-warning { background: var(--warning); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(50px); }
}

/* ---------- Quantity Display ---------- */
.qty-positive {
    color: var(--success-dark);
    font-weight: 600;
}

.qty-negative {
    color: var(--danger);
    font-weight: 600;
}

.stock-flow {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem;
}

.stock-flow .arrow {
    color: var(--gray-500);
}

/* ---------- POS (前台販售) ---------- */
.tab-btn-pos {
    background: linear-gradient(135deg, #2ec4b6, #38d9a9) !important;
    color: var(--white) !important;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    font-weight: 700 !important;
    font-size: 1rem !important;
    border-bottom: 3px solid var(--success) !important;
}

.tab-btn-pos:hover {
    background: linear-gradient(135deg, #25a99d, #2ec4b6) !important;
    color: var(--white) !important;
}

.tab-btn-pos.active {
    background: linear-gradient(135deg, #1b9e8f, #25a99d) !important;
    color: var(--white) !important;
    border-bottom-color: #1b9e8f !important;
}

.pos-container {
    max-width: 800px;
    margin: 0 auto;
}

.pos-search-area {
    margin-bottom: 1rem;
}

.pos-search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.pos-search-box i {
    position: absolute;
    left: 1rem;
    color: var(--gray-500);
    font-size: 1.1rem;
    z-index: 1;
}

.pos-search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: 1.1rem;
    transition: var(--transition);
    background: var(--white);
}

.pos-search-box input:focus {
    outline: none;
    border-color: var(--success);
    box-shadow: 0 0 0 4px rgba(46,196,182,0.15);
}

/* 商品快選網格 */
.pos-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
    max-height: 360px;
    overflow-y: auto;
    padding: 0.25rem;
}

.pos-product-card {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    position: relative;
    min-height: 90px;
    justify-content: center;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.pos-product-card:hover {
    border-color: var(--success);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

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

.pos-product-card.selected {
    border-color: var(--success);
    background: var(--success-light);
    box-shadow: 0 0 0 3px rgba(46,196,182,0.25);
}

.pos-product-card.alert-card {
    border-color: var(--danger);
    background: var(--danger-light);
}

.pos-product-card.alert-card .pos-card-alert {
    display: block;
}

.pos-card-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--gray-800);
    line-height: 1.3;
}

.pos-card-stock {
    font-size: 0.82rem;
    color: var(--gray-600);
}

.pos-card-stock strong {
    font-size: 1.05rem;
    color: var(--primary);
}

.pos-card-alert {
    display: none;
    position: absolute;
    top: 0.35rem;
    right: 0.35rem;
    background: var(--danger);
    color: var(--white);
    font-size: 0.6rem;
    padding: 0.15rem 0.4rem;
    border-radius: 10px;
    font-weight: 700;
}

/* 販售操作面板 */
.pos-action-panel {
    background: var(--white);
    border: 2px solid var(--success);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    box-shadow: var(--shadow);
}

.pos-selected-info {
    flex: 1;
    min-width: 150px;
}

.pos-selected-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.pos-selected-stock {
    font-size: 0.9rem;
    color: var(--gray-600);
}

.pos-qty-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.pos-qty-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
}

.pos-qty-row {
    display: flex;
    align-items: center;
    gap: 0;
}

.pos-qty-btn {
    width: 52px;
    height: 52px;
    border: 2px solid var(--gray-300);
    background: var(--white);
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-700);
    -webkit-tap-highlight-color: transparent;
}

.pos-qty-minus {
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    border-right: none;
}

.pos-qty-plus {
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    border-left: none;
}

.pos-qty-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

.pos-qty-btn:active {
    transform: scale(0.93);
}

.pos-qty-input {
    width: 70px;
    height: 52px;
    text-align: center;
    font-size: 1.4rem;
    font-weight: 700;
    border: 2px solid var(--gray-300);
    font-family: var(--font);
    color: var(--gray-900);
    -moz-appearance: textfield;
}

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

.pos-qty-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67,97,238,0.15);
}

.pos-confirm-btn {
    padding: 0.9rem 2.5rem;
    background: linear-gradient(135deg, #2ec4b6, #20b2aa);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    box-shadow: 0 4px 12px rgba(46,196,182,0.35);
    -webkit-tap-highlight-color: transparent;
    min-height: 56px;
}

.pos-confirm-btn:hover {
    background: linear-gradient(135deg, #25a99d, #1b9e8f);
    box-shadow: 0 6px 18px rgba(46,196,182,0.45);
    transform: translateY(-1px);
}

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

.pos-today-total {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--success-dark);
    background: var(--success-light);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
}

.pos-empty {
    text-align: center;
    padding: 2rem;
    color: var(--gray-500);
    grid-column: 1 / -1;
}

.pos-empty i {
    font-size: 2.5rem;
    color: var(--gray-400);
    display: block;
    margin-bottom: 0.5rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    html { font-size: 14px; }

    .header {
        padding: 0.8rem 1rem;
    }

    .header h1 {
        font-size: 1.1rem;
    }

    .header-date { display: none; }

    .tab-nav {
        padding: 0 0.5rem;
        top: 56px;
    }

    .tab-btn {
        padding: 0.8rem 1rem;
        font-size: 0.85rem;
    }

    .tab-btn span { display: none; }

    .main-content {
        padding: 1rem;
    }

    .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .form-row {
        flex-direction: column;
    }

    .flex-1, .flex-2, .flex-3, .flex-btn {
        flex: unset;
        width: 100%;
    }

    .card-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .card-header-actions {
        width: 100%;
    }

    .search-box {
        flex: 1;
    }

    .search-box input {
        width: 100%;
    }

    .search-box input:focus {
        width: 100%;
    }

    .filter-row {
        flex-direction: column;
    }

    .filter-row .form-group {
        min-width: unset;
        width: 100%;
    }

    .action-btns {
        flex-direction: column;
    }

    .modal {
        width: 95%;
        margin: 1rem;
    }

    .log-summary {
        flex-direction: column;
        gap: 0.5rem;
    }

    /* POS mobile */
    .pos-product-grid {
        grid-template-columns: repeat(2, 1fr);
        max-height: 280px;
    }

    .pos-action-panel {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .pos-qty-control {
        align-items: stretch;
    }

    .pos-qty-row {
        justify-content: center;
    }

    .pos-confirm-btn {
        justify-content: center;
        width: 100%;
        font-size: 1.3rem;
        padding: 1rem;
    }

    .pos-qty-btn {
        width: 60px;
        height: 56px;
        font-size: 1.5rem;
    }

    .pos-qty-input {
        width: 80px;
        height: 56px;
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .stats-row {
        grid-template-columns: 1fr;
    }

    .stat-card {
        padding: 0.8rem 1rem;
    }

    .stat-value {
        font-size: 1.4rem;
    }
}