/* ═══════════════════════════════════════════════════════════════
   NOVA DESIGN — POS Design System
   Maroon + Gold | Professional POS Interface
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS Variables ─── */
:root {
    /* Brand Colors — from logo */
    --maroon-dark: #1a0505;
    --maroon: #3a0a0a;
    --maroon-mid: #5a1515;
    --maroon-light: #7a2525;
    --gold: #d4b978;
    --gold-light: #e8d5a5;
    --gold-dark: #b89a52;
    --gold-glow: rgba(212, 185, 120, 0.3);
    --cream: #f5e6c8;
    --cream-light: #faf3e5;

    /* Functional */
    --bg-primary: #0f0404;
    --bg-secondary: #1a0808;
    --bg-card: #220c0c;
    --bg-card-hover: #2d1010;
    --bg-input: #180606;
    --border-color: rgba(212, 185, 120, 0.15);
    --border-hover: rgba(212, 185, 120, 0.35);

    --text-primary: #f5e6c8;
    --text-secondary: #c4a875;
    --text-muted: #8a6e45;

    --success: #4CAF50;
    --success-bg: rgba(76, 175, 80, 0.1);
    --danger: #e53935;
    --danger-bg: rgba(229, 57, 53, 0.1);
    --warning: #FF9800;
    --info: #29B6F6;

    /* Spacing */
    --sp-xs: 4px;
    --sp-sm: 8px;
    --sp-md: 16px;
    --sp-lg: 24px;
    --sp-xl: 32px;
    --sp-2xl: 48px;

    /* Typography */
    --font-main: 'Segoe UI', 'Tahoma', 'Cairo', sans-serif;
    --font-mono: 'Consolas', 'JetBrains Mono', monospace;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-gold: 0 0 20px rgba(212, 185, 120, 0.1);

    /* Transitions */
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 15px;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    direction: rtl;
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--maroon-mid);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gold-dark);
}

/* ─── Typography ─── */
h1,
h2,
h3,
h4,
h5 {
    line-height: 1.3;
    color: var(--text-primary);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.2rem;
}

.gold {
    color: var(--gold);
}

.mono {
    font-family: var(--font-mono);
}

/* ─── Layout ─── */
.pos-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

.pos-sidebar {
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: var(--sp-md);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.pos-main {
    padding: var(--sp-xl);
    overflow-y: auto;
    max-height: 100vh;
}

/* ─── Sidebar Brand ─── */
.sidebar-brand {
    text-align: center;
    padding: var(--sp-lg) var(--sp-sm);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--sp-md);
}

.sidebar-brand img {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    border: 2px solid var(--gold);
    margin-bottom: var(--sp-sm);
}

.sidebar-brand h2 {
    font-size: 1rem;
    color: var(--gold);
}

.sidebar-brand p {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ─── Sidebar Nav ─── */
.sidebar-nav {
    list-style: none;
    flex: 1;
}

.sidebar-nav li {
    margin-bottom: 2px;
}

.sidebar-nav a,
.sidebar-nav button {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    padding: var(--sp-sm) var(--sp-md);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    background: transparent;
    width: 100%;
    font-family: inherit;
    direction: rtl;
    text-align: right;
}

.sidebar-nav a:hover,
.sidebar-nav button:hover {
    background: var(--bg-card);
    color: var(--gold);
}

.sidebar-nav a.active,
.sidebar-nav button.active {
    background: var(--maroon);
    color: var(--gold);
    border-right: 3px solid var(--gold);
}

.sidebar-nav .icon {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

/* ─── Sidebar User ─── */
.sidebar-user {
    padding: var(--sp-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
}

.sidebar-user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--maroon);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    font-weight: bold;
    font-size: 0.8rem;
}

.sidebar-user-info {
    flex: 1;
}

.sidebar-user-info .name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar-user-info .role {
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* ─── Login Screen ─── */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(ellipse at center, var(--maroon) 0%, var(--bg-primary) 70%);
}

.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--sp-2xl) var(--sp-xl);
    width: 380px;
    max-width: 90vw;
    text-align: center;
    box-shadow: var(--shadow-lg), var(--shadow-gold);
}

.login-box img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 3px solid var(--gold);
    margin-bottom: var(--sp-lg);
}

.login-box h1 {
    color: var(--gold);
    font-size: 1.4rem;
    margin-bottom: var(--sp-xs);
}

.login-box .subtitle {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: var(--sp-xl);
}

.pin-input-group {
    display: flex;
    gap: var(--sp-sm);
    justify-content: center;
    direction: ltr;
    margin-bottom: var(--sp-lg);
}

.pin-digit {
    width: 56px;
    height: 64px;
    text-align: center;
    font-size: 1.8rem;
    font-weight: bold;
    font-family: var(--font-mono);
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--gold);
    outline: none;
    transition: var(--transition);
    caret-color: var(--gold);
}

.pin-digit:focus {
    border-color: var(--gold);
    box-shadow: 0 0 12px var(--gold-glow);
}

.pin-digit.filled {
    border-color: var(--gold-dark);
}

.login-name {
    font-size: 1.1rem;
    color: var(--gold);
    margin-bottom: var(--sp-md);
    min-height: 30px;
    transition: var(--transition);
}

.login-error {
    color: var(--danger);
    font-size: 0.8rem;
    min-height: 24px;
}

/* ─── Page Header ─── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-xl);
    flex-wrap: wrap;
    gap: var(--sp-md);
}

.page-header h1 {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    font-size: 1.4rem;
}

.page-header h1 .icon {
    font-size: 1.5rem;
}

/* ─── Cards ─── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--sp-lg);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-hover);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-lg);
    padding-bottom: var(--sp-md);
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1rem;
    color: var(--gold);
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
}

/* ─── Stat Cards ─── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--sp-md);
    margin-bottom: var(--sp-xl);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--sp-lg);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--gold-dark);
    box-shadow: var(--shadow-gold);
}

.stat-card .value,
.stat-card .stat-value {
    font-size: 2rem;
    font-weight: bold;
    font-family: var(--font-mono);
    color: var(--gold);
    line-height: 1;
}

.stat-card .label,
.stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--sp-xs);
}

.stat-card .icon {
    font-size: 1.5rem;
    margin-bottom: var(--sp-sm);
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-sm);
    padding: var(--sp-sm) var(--sp-lg);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.btn-gold {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--maroon-dark);
    border-color: var(--gold);
}

.btn-gold:hover {
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    box-shadow: 0 0 20px var(--gold-glow);
    transform: translateY(-1px);
}

.btn-maroon {
    background: var(--maroon);
    color: var(--gold);
    border-color: var(--maroon-mid);
}

.btn-maroon:hover {
    background: var(--maroon-mid);
    border-color: var(--gold-dark);
}

.btn-outline {
    background: transparent;
    color: var(--gold);
    border-color: var(--border-color);
}

.btn-outline:hover {
    border-color: var(--gold);
    background: rgba(212, 185, 120, 0.05);
}

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

.btn-danger {
    background: transparent;
    color: var(--danger);
    border-color: var(--danger);
}

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

.btn-sm {
    padding: var(--sp-xs) var(--sp-md);
    font-size: 0.8rem;
}

.btn-lg {
    padding: var(--sp-md) var(--sp-xl);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ─── POS Product Buttons ─── */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--sp-sm);
}

.product-btn {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--sp-md);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    color: var(--text-primary);
}

.product-btn:hover {
    border-color: var(--gold);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
}

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

.product-btn .name {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--sp-xs);
}

.product-btn .price {
    font-size: 1.1rem;
    font-family: var(--font-mono);
    color: var(--gold);
    font-weight: bold;
}

.product-btn .unit {
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* ─── Form Elements ─── */
.form-group {
    margin-bottom: var(--sp-md);
}

.form-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--sp-xs);
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: var(--sp-sm) var(--sp-md);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--gold);
    box-shadow: 0 0 8px var(--gold-glow);
}

.form-input::placeholder {
    color: var(--text-muted);
}

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23d4b978' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 12px center;
    padding-left: 32px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-md);
}

.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--sp-md);
}

/* Checkbox toggle */
.toggle-wrap {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    cursor: pointer;
}

.toggle-wrap input {
    display: none;
}

.toggle-track {
    width: 40px;
    height: 22px;
    background: var(--bg-input);
    border-radius: 11px;
    border: 1px solid var(--border-color);
    position: relative;
    transition: var(--transition);
}

.toggle-track::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--text-muted);
    border-radius: 50%;
    top: 2px;
    right: 2px;
    transition: var(--transition);
}

.toggle-wrap input:checked+.toggle-track {
    background: var(--gold-dark);
    border-color: var(--gold);
}

.toggle-wrap input:checked+.toggle-track::after {
    right: auto;
    left: 2px;
    background: var(--gold);
}

/* ─── Cart / Invoice ─── */
.cart-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.cart-header {
    padding: var(--sp-md) var(--sp-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.cart-header h3 {
    color: var(--gold);
    font-size: 1rem;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--sp-sm);
}

.cart-item {
    display: grid;
    grid-template-columns: 1fr auto auto auto;
    align-items: center;
    gap: var(--sp-sm);
    padding: var(--sp-sm) var(--sp-md);
    border-bottom: 1px solid rgba(212, 185, 120, 0.07);
    font-size: 0.85rem;
}

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

.cart-item .item-name {
    font-weight: 500;
}

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

.cart-item .item-qty button {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--gold);
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.cart-item .item-qty button:hover {
    border-color: var(--gold);
}

.cart-item .item-qty span {
    min-width: 24px;
    text-align: center;
    font-family: var(--font-mono);
    font-weight: bold;
}

.cart-item .item-price {
    font-family: var(--font-mono);
    color: var(--gold);
    font-weight: 600;
    min-width: 70px;
    text-align: left;
}

.cart-item .item-remove {
    color: var(--danger);
    cursor: pointer;
    background: none;
    border: none;
    font-size: 1rem;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}

.cart-item .item-remove:hover {
    background: var(--danger-bg);
}

.cart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--sp-2xl);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.cart-empty .icon {
    font-size: 2.5rem;
    margin-bottom: var(--sp-md);
    opacity: 0.5;
}

.cart-footer {
    border-top: 2px solid var(--gold-dark);
    padding: var(--sp-md) var(--sp-lg);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--sp-md);
}

.cart-total .label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.cart-total .amount {
    font-size: 1.8rem;
    font-weight: bold;
    font-family: var(--font-mono);
    color: var(--gold);
}

.cart-total .currency {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-right: var(--sp-xs);
}

.cart-actions {
    display: flex;
    gap: var(--sp-sm);
}

.cart-actions .btn {
    flex: 1;
}

/* ─── Tables ─── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-table th {
    text-align: right;
    padding: var(--sp-sm) var(--sp-md);
    background: var(--bg-secondary);
    color: var(--gold);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.data-table td {
    padding: var(--sp-sm) var(--sp-md);
    border-bottom: 1px solid rgba(212, 185, 120, 0.05);
    color: var(--text-primary);
}

.data-table tr:hover td {
    background: rgba(212, 185, 120, 0.03);
}

.data-table .mono {
    font-family: var(--font-mono);
}

.data-table .actions {
    display: flex;
    gap: 4px;
}

.data-table .actions button {
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition);
}

.data-table .actions button:hover {
    border-color: var(--gold);
    color: var(--gold);
}

.data-table .actions .delete-btn:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* ─── Tabs ─── */
.tabs {
    display: flex;
    gap: 2px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 3px;
    margin-bottom: var(--sp-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--sp-sm) var(--sp-md);
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--text-secondary);
}

.tab-btn.active {
    background: var(--maroon);
    color: var(--gold);
    box-shadow: var(--shadow-sm);
}

.tab-content {
    display: none;
}

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

/* Page content visibility */
.page-content {
    display: none;
}

.page-content.active {
    display: block;
}

/* ─── Modal ─── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--sp-xl);
    width: 500px;
    max-width: 90vw;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-lg);
    padding-bottom: var(--sp-md);
    border-bottom: 1px solid var(--border-color);
}

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

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger);
}

/* ─── Invoice Print ─── */
.invoice-preview {
    background: #fff;
    color: #111;
    padding: var(--sp-xl);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    direction: rtl;
}

.invoice-preview h2 {
    color: var(--maroon);
    text-align: center;
    margin-bottom: var(--sp-xs);
}

.invoice-preview .store-sub {
    text-align: center;
    color: #666;
    font-size: 0.75rem;
    margin-bottom: var(--sp-lg);
}

.invoice-preview .inv-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #555;
    margin-bottom: var(--sp-md);
    border-bottom: 1px dashed #ccc;
    padding-bottom: var(--sp-sm);
}

.invoice-preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--sp-md);
}

.invoice-preview th {
    background: #f0f0f0;
    padding: 6px 8px;
    font-size: 0.75rem;
    text-align: right;
    border-bottom: 2px solid #ddd;
}

.invoice-preview td {
    padding: 6px 8px;
    border-bottom: 1px solid #eee;
    font-size: 0.8rem;
}

.invoice-preview .inv-total {
    text-align: left;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--maroon);
    border-top: 2px solid var(--maroon);
    padding-top: var(--sp-sm);
}

/* ─── Badges ─── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

.badge-gold {
    background: var(--gold-glow);
    color: var(--gold);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

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

.badge-info {
    background: rgba(41, 182, 246, 0.1);
    color: var(--info);
}

/* ─── Toast ─── */
.toast-container {
    position: fixed;
    top: var(--sp-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--sp-md) var(--sp-lg);
    color: var(--text-primary);
    font-size: 0.85rem;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    pointer-events: all;
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--danger);
}

.toast.info {
    border-color: var(--info);
}

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

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: var(--sp-2xl);
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: var(--sp-md);
    opacity: 0.4;
}

.empty-state p {
    font-size: 0.85rem;
}

/* ─── Loading ─── */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: inline-block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ─── Calculator Display ─── */
.calc-display {
    background: var(--bg-secondary);
    border: 2px solid var(--gold-dark);
    border-radius: var(--radius-lg);
    padding: var(--sp-xl);
    text-align: center;
    margin-bottom: var(--sp-lg);
}

.calc-display .result {
    font-size: 2.5rem;
    font-family: var(--font-mono);
    font-weight: bold;
    color: var(--gold);
    line-height: 1;
}

.calc-display .unit {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: var(--sp-xs);
}

.calc-display .formula {
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    margin-top: var(--sp-sm);
}

/* ─── Filter Bar ─── */
.filter-bar {
    display: flex;
    gap: var(--sp-sm);
    margin-bottom: var(--sp-lg);
    flex-wrap: wrap;
}

.filter-bar .form-input {
    max-width: 200px;
}

/* ─── Print Styles ─── */
@media print {
    body * {
        visibility: hidden;
    }

    .invoice-preview,
    .invoice-preview * {
        visibility: visible !important;
    }

    .invoice-preview {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        padding: 20px;
    }
}

/* ─── Calculator + Cart Grid ─── */
.calc-cart-grid {
    display: grid;
    grid-template-columns: 1fr clamp(220px, 35%, 380px);
    gap: var(--sp-lg);
    align-items: start;
}

.cart-section {
    position: sticky;
    top: var(--sp-md);
}

.calc-display .result {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
}

/* ─── Responsive (Tablet) ─── */
@media (max-width: 900px) {
    .pos-layout {
        grid-template-columns: 1fr;
    }

    .pos-sidebar {
        position: fixed;
        right: -280px;
        top: 0;
        width: 260px;
        height: 100vh;
        z-index: 500;
        transition: right 0.3s ease;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.5);
    }

    .pos-sidebar.open {
        right: 0;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 499;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .mobile-toggle {
        display: flex !important;
    }

    .form-row,
    .form-row-3 {
        grid-template-columns: 1fr;
    }

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

    .page-header {
        flex-direction: column;
        gap: var(--sp-sm);
        align-items: stretch;
    }

    .page-header h1 {
        font-size: 1.2rem;
    }

    .data-table {
        font-size: 0.8rem;
    }

    .data-table th,
    .data-table td {
        padding: 8px 6px;
        white-space: nowrap;
    }

    .calc-cart-grid {
        grid-template-columns: 1fr clamp(180px, 40%, 300px);
        gap: var(--sp-md);
    }
}

/* ─── Responsive (Phone ≤600px) ─── */
@media (max-width: 600px) {
    html {
        font-size: clamp(11px, 3vw, 14px);
    }

    /* ── Calculator + Cart stack vertically ── */
    .calc-cart-grid {
        grid-template-columns: 1fr;
        gap: clamp(8px, 2vw, 14px);
    }

    .cart-section {
        position: static;
    }

    .cart-header h3 {
        font-size: clamp(0.85rem, 3vw, 1rem);
    }

    .cart-items {
        max-height: 30vh;
        overflow-y: auto;
    }

    .cart-total .amount {
        font-size: clamp(1.2rem, 5vw, 1.8rem);
    }

    .cart-actions {
        flex-wrap: wrap;
        gap: 6px;
    }

    .cart-actions .btn {
        flex: 1;
        min-width: 0;
    }

    .calc-display .result {
        font-size: clamp(1.2rem, 6vw, 2rem);
    }

    .calc-display .formula {
        font-size: clamp(0.65rem, 2.5vw, 0.8rem);
    }

    /* ── Login ── */
    .login-screen {
        padding: 4vw;
    }

    .login-box {
        padding: clamp(1rem, 5vw, 1.5rem);
        width: 100%;
        max-width: 100%;
    }

    .login-box img {
        width: clamp(50px, 15vw, 70px);
        height: clamp(50px, 15vw, 70px);
    }

    .login-box h1 {
        font-size: clamp(1rem, 4vw, 1.4rem);
    }

    .login-box .subtitle {
        font-size: clamp(0.7rem, 2.5vw, 0.9rem);
    }

    .pin-input-group {
        gap: clamp(4px, 2vw, 8px);
    }

    .pin-digit {
        width: clamp(38px, 12vw, 50px) !important;
        height: clamp(42px, 13vw, 55px) !important;
        font-size: clamp(1rem, 4vw, 1.5rem) !important;
    }

    /* ── Main Content ── */
    .pos-main {
        padding: clamp(4px, 2vw, 12px);
    }

    .card {
        border-radius: 8px;
    }

    .card-header {
        padding: clamp(6px, 2vw, 10px) clamp(8px, 3vw, 14px);
    }

    .card-header .card-title {
        font-size: clamp(0.75rem, 2.8vw, 1rem);
    }

    /* ── Page Header ── */
    .page-header {
        flex-direction: column;
        gap: 8px;
        padding: clamp(8px, 2vw, 12px) 0;
    }

    .page-header h1 {
        font-size: clamp(0.9rem, 3.5vw, 1.3rem);
    }

    .page-header .btn {
        width: 100%;
        text-align: center;
    }

    /* ── Stats Grid ── */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: clamp(4px, 1.5vw, 8px);
    }

    .stat-card {
        padding: clamp(6px, 2vw, 10px);
    }

    .stat-card .value {
        font-size: clamp(1rem, 4vw, 1.4rem);
    }

    .stat-card .label,
    .stat-card .change {
        font-size: clamp(0.6rem, 2vw, 0.75rem);
    }

    /* ── Sidebar Brand ── */
    .sidebar-brand {
        padding: clamp(8px, 2vw, 14px);
    }

    .sidebar-brand img {
        width: clamp(35px, 10vw, 50px);
        height: clamp(35px, 10vw, 50px);
    }

    .sidebar-brand h2 {
        font-size: clamp(0.85rem, 3vw, 1.1rem);
    }

    /* ── Tables ── */
    .data-table {
        font-size: clamp(0.65rem, 2.2vw, 0.8rem);
    }

    .data-table th,
    .data-table td {
        padding: clamp(4px, 1.5vw, 8px) clamp(3px, 1vw, 6px);
        white-space: nowrap;
    }

    /* ── Chart grids stack on phone ── */
    div[style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }

    div[style*="grid-template-columns: repeat(3"] {
        grid-template-columns: 1fr !important;
    }

    div[style*="grid-template-columns: repeat(4"] {
        grid-template-columns: 1fr 1fr !important;
    }

    /* ── Modal ── */
    .modal-content {
        width: 94vw !important;
        max-width: 94vw !important;
        margin: 3vw auto;
        max-height: 90vh;
        padding: clamp(0.8rem, 3vw, 1.2rem);
    }

    .modal-content .form-group {
        margin-bottom: clamp(8px, 2vw, 14px);
    }

    .modal-content .form-label {
        font-size: clamp(0.75rem, 2.5vw, 0.9rem);
    }

    .modal-content .form-input {
        padding: clamp(6px, 2vw, 10px);
        font-size: 16px;
        /* Prevents iOS zoom */
    }

    /* ── Filter Bar ── */
    .filter-bar {
        flex-direction: column;
        gap: 6px;
    }

    .filter-bar .form-input {
        width: 100%;
    }

    /* ── Buttons ── */
    .btn {
        padding: clamp(6px, 2vw, 10px) clamp(10px, 3vw, 16px);
        font-size: clamp(0.7rem, 2.5vw, 0.85rem);
    }

    .btn-sm {
        padding: clamp(3px, 1vw, 6px) clamp(6px, 2vw, 10px);
        font-size: clamp(0.6rem, 2vw, 0.75rem);
    }

    .btn-block {
        padding: clamp(8px, 2.5vw, 12px);
    }

    /* ── Invoice area ── */
    .invoice-actions {
        flex-wrap: wrap;
        gap: 6px;
    }

    .invoice-actions .btn {
        flex: 1;
        min-width: 45%;
        text-align: center;
    }

    /* ── Heatmap hide on phone ── */
    .heatmap-grid {
        display: none;
    }

    /* ── Subscription / info bars ── */
    div[style*="display: flex; justify-content: space-between"] {
        flex-direction: column !important;
        gap: 8px;
        text-align: center !important;
    }

    /* ── Notification cards ── */
    .system-notification {
        padding: clamp(8px, 2.5vw, 12px) !important;
        font-size: clamp(0.75rem, 2.5vw, 0.9rem) !important;
    }

    /* ── Chart height ── */
    canvas {
        max-height: 200px !important;
    }
}

/* ─── Mobile Toggle Button ─── */
.mobile-toggle {
    display: none;
    position: fixed;
    top: var(--sp-md);
    right: var(--sp-md);
    z-index: 600;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--gold);
    font-size: 1.3rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
}

/* ─── PWA / Touch optimizations ─── */
body {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

.btn,
button {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

input,
select,
textarea {
    font-size: 16px;
    /* Prevents iOS zoom on focus */
}